Accelerator Physics Section

Section is involved in physics design of circular accelerators such as booster synchrotron, Indus-1 & Indus-2 and beam transfer lines connecting various accelerators namely TL-1, TL-2 & TL-3. It provide beam dynamics support towards the improvement and upgradation of the accelerator facility. Also participates in round the clock operation, where main objective is to provide the photon beam to the beam line users from all corners of India for carrying out scientific research using Synchrotron Radiation (SR) in various domain.


Group Activities
Publications
Group Members

Design, commissioning and operation of Indus-1 and Indus-2

Two SR sources namely Indus-1 (450 MeV electron storage ring) and Indus-2 (2.5 GeV electron storage ring) are housed in RRCAT. A beam dynamics based lattice design of these SR sources along with their common injector namely booster synchrotron was evolved. The design study of the lattice is being carried out using various computational code named as MAD, ORBIT, AT and RACETRACK. Apart from the lattice design, study of beam injection, extraction and study of different beam instabilities are also been carried out. These studies are made using the centralized scientific computing servers (BETA, CHI, DELTA, and AMOGH) and scientific computing clusters (KSHITIJ) at RRCAT. These simulations helps in finalizing the design and tolerances of various component of the accelerator. These radiation sources have been commissioned successfully and being operated near to the design beam parameter. Both the sources Indus-1 & Indus-2 are now operational in round the clock mode since Feb 2010. Most of the members of our section had undergone the rigorous training and qualification tests for the operation of these sources and contributing as beam physicists for reliable and smooth operation. Indus-2 is successfully operated with a beam current of ~200 mA at 2.5 GeV as shown in figure below

Operation of Indus-2 at 200 mA @ 2.5 GeV
Operation of Indus-2 at 200 mA @ 2.5 GeV

Design and commissioning of undulators in Indus-2

Specification of two planer undulators U1& U2 and one helical undulator U3 were evolved using beam dynamics simulation in Indus-2. With the designed specifications, these magnets are installed and commissioned. All three undulators have been successfully operated with the beam in Indus-2. Their effects on electron beam are measured and found to be in good agreement with the model predictions. Both the planer undulators U1 & U2 are operated with stored beam current of 150 mA and Apple-II undulator (U3) was operated with 100 mA at 2.5 GeV.

High current operation in Indus-2

Synchrotron Radiation flux from a synchrotron radiation source increases at higher beam current, however increasing stored beam current poses challenges due to beam instabilities and heat load on the components. Indus-2 operates in ramp mode, i.e. the injection energy of electron beam (550 MeV) is lower than the final energy (2.5 GeV) in user mode. Therefore, high current operation includes a proper optics and instability control over the energy ramp also. Proper tuning of the different quadrupole magnets, i.e. keeping the betatron tunes away from dangerous resonances, mitigating higher order mode problems to suppress the instabilities by optimized settings of RF cavities temperature and bunch by bunch feedback system in the entire ramping made it possible to increase the beam current to 200 mA at 2.5 GeV, in-spite of varying over voltage factor during energy ramping. Routinely, Indus-2 is now operating at higher beam current for users.

Closed orbit correction

In real operation of any circular accelerator, there are magnet-to-magnet field errors, stability errors of power supplies driving the magnets, misalignment of the magnetic elements etc. These errors distorts the ideal path known as closed orbit distortion (COD). The COD degrades performance of the storage ring in terms of poor beam injection, reduced beam lifetime and most importantly, improper photon beam delivery to the users. Therefore, it is necessary to correct the COD all over the ring. For the measurement of COD, there 56-beam position monitors (BPMs) distributed all over the ring and for its correction, 48 horizontal and 40 vertical orbit corrector magnets are installed. It is a COD minimisation problem based on orbit response matrix (ORM) between changes in orbit at BPMs with known change in corrector current. The SVD of the model and measured ORM in both the planes is shown in figure-1. The RMS COD was reduced to 0.3 mm and 0.2 mm from 4.5 mm and 1.7 mm after integrating the BPM offsets determined by beam based alignment (BBA) technique and taking corrective action, which is shown in figure-2.

Figure -1: Comparison of singlura value decompostion of the measured and model ORM.
Figure -1: Comparison of singlura value decompostion of the measured and model ORM.
Figure-2:  Corrected horizontal and vertical COD before and after incorporating the BPM offsets
Figure-2:  Corrected horizontal and vertical COD before and after incorporating the BPM offsets
Figure-2: Corrected horizontal and vertical COD before and after incorporating the BPM offsets

Beam Based Alignment (BBA)

The main objective of this BBA is to pass the electron beam through centre of magnetic elements of the Indus-2 ring. For this, the offsets of all the 56 beam position monitors (BPM) distributed over the ring were determined using beam-based alignment (BBA) technique. The process of finding the offset was very cumbersome and hence made fully automated. One such offset measurement is shown in figure below. After the BBA measurement, the offsets were incorporated in BPM system for further COD correction. This exercise, resulted into reduction of COD of Indus-2 substantially in both the horizontal and vertical plane. With this correction, more aperture was available to the beam and that enhances beam lifetime in Indus-2 significantly.

Offset determination for the BPM in Indus-2 using beam based alignment (BBA)
Offset determination for the BPM in Indus-2 using beam based alignment (BBA)

Impact of undulator on Beam dynamics in Indus-2

The magnetic field of undulator introduces perturbations in the path of the circulating electron beam and hence affect the linear and nonlinear beam dynamics of the electron beam in a storage ring. Study of the perturbations is essential for two purposes: first, to avoid degradation in the performance of the storage ring and second, to avoid any variation in the synchrotron radiation photon beam characteristics, which are primarily defined by the electron beam parameters at the radiation source point. In this context, study of tune, beta, emittance, and energy spread variation was carried out. Measurement results of tune and beta variations are in good agreement with the theoretical calculations. Emittance and energy spread variations are found to be very small. The impact of nonlinear perturbations are analysed with the help of Frequency Map Analysis (FMA), and is shown in figure-1. This reveals that the nonlinear perturbations induced by undulators fields are not affecting the performance of the storage ring. The measured orbit variation with different pole gaps of undulator is shown in figure-2. Also, the variation in betatron tune in operating the undulator is measured and shown in figure-3.

Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2
Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2
(a)

(b)

Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2
Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2
(c)

(d)

Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2
Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2
(e)

(f)

Figure-1. Frequency map analysis and dynamic aperture of Indus-2 ring before and after having undulators U1 and U2


Figure 2: Orbit variation with the pole gap of undulators U1 and U2
Figure 2: Orbit variation with the pole gap of undulators U1 and U2
Figure 2: Orbit variation with the pole gap of undulators U1 and U2
Figure 2: Orbit variation with the pole gap of undulators U1 and U2
Figure 2: Orbit variation with the pole gap of undulators U1 and U2


Figure 3: Vertical tune variation with the pole gap of undulators U1 and U2
Figure 3: Vertical tune variation with the pole gap of undulators U1 and U2
Figure 3: Vertical tune variation with the pole gap of undulators U1 and U2

Ion trapping investigation

In Indus-2, beam current saturation was observed when the stored beam current reached around 100 mA. After several experimentation and simulation, it was concluded the presence of ion trapping is the main cause behind it. To overcome the effect of ion trapping, simulation study was carried out and a suitable bunch filling scheme was evolved by which the disturbing effects caused by the ions were mitigated. The stability of ion species throughout the Indus-2 ring was estimated using various configuration of bunch train and the simulation result for the CO+ ion is shown in adjoining figure. This figure suggests that to mitigate the ion trapping problem, a bunch filling pattern consists of a long train of 150 consecutive bunches out of total 291 bunches is an optimized solution. With this optimal partial bunch filling pattern, higher beam current accumulation was achieved in Indus-2.

Percentage of region of ring circumference where the CO ions are trapped for various length of bunch train in the Indus-2
Percentage of region of ring circumference where the CO ions are trapped for various length of bunch train in the Indus-2

Low emittance optimization and operation of Indus-2

The spectral brightness of photon beam from bending magnet and insertion devices can be increased by reducing the stored electron beam emittance. In order to operate indus-2 at reduced emittance, a very ambitious operation method is evolved and implemented at final beam energy to reduce beam emittance one third of its present operating value (135 nm-rad) without any additional beam loss. For switching over to the low emittance mode, strengths of quadrupole and sextupole magnets are adjusted as shown in the figure-1. Smooth switch over is ensured, without extra close orbit distortion, beta-beating and drifts in the tunes. The beam sizes are measured on X- ray diagnostic beam line at bending magnet during the process of emittance reduction. The variation of beam size, during switch over is shown in the figure-2.

Figure-1: Variation of strengths of quadrupole and sextupole magnets during switch over from nominal operating emittance to reduced emittance
Figure-2: Variation of horizontal and vertical measured beam sizes during switch over.
Figure-1: Variation of strengths of quadrupole and sextupole magnets during switch over from nominal operating emittance to reduced emittance
Figure-2: Variation of horizontal and vertical measured beam sizes during switch over.

Beam injection dynamics

In booster, Indus-1 and Indus-2, three, single and four injection kicker schemes are adopted respectively to carry out multi-turn beam injection. The performance of booster in terms of accelerated beam current is better in uncompensated bump injection scheme as compared to compensated bump injection scheme. Indus-2 was commissioned and operated with moderate optics to overcome several difficulties faced in the beam injection with a low beam emittance optics. These difficulties are mainly governed by the higher strength of chromaticity correcting sextupole magnets. In the low emittance optics, due to higher strength of chromaticity correcting sextupole magnets, dynamic aperture is smaller as well as during beam injection injected and stored beam oscillations are higher as compared to the moderate optics. Even for the moderate optics, the maximum amplitude of injected and stored beam oscillations are reaching near to the septum magnet, which is shown in adjoining figure. The amplitude of these oscillations are reduced with the help of off momentum beam injection.

Injected beam oscillation
Stored beam oscillation
Injected beam oscillation
Stored beam oscillation
Injected and stored beam oscillations in the presence of mismatch between injection kickers

Beam lifetime

The lifetime of the stored electron beam in a synchrotron radiation source is mainly dominated by beam-gas interactions (vacuum lifetime) and electron-electron interactions within a beam bunch (Touschek lifetime). It depends on the dynamic aperture available for on-momentum and off-momentum electrons for stable motion in storage ring. Horizontal and vertical aperture available for beam motion has been measured using horizontal and vertical scrapers installed in one of the long straight sections in the ring. The vacuum pressure in the ring was not uniform and at ~100 mA stored current at 2.5 GeV was ~ 2*10-9 mbar at most of the places in the ring except at four injection kicker location where it was ~1*10-8 mbar. After the replacement of vacuum chamber of all four kicker magnets, the vacuum pressure everywhere in the ring was reduced to ~ 1*10-9 mbar. As a result, beam lifetime at 100 mA stored current at beam energy 2.5 GeV increased to ~32 hours which was ~22 hours before replacement of the vacuum chambers at kicker locations. A comparison in beam current decay and vacuum pressure before and after vacuum chamber replacement is shown in figure. With this continuous improved condition, beam lifetime more than 40 hours has been achieved at 100 mA stored current at 2.5 GeV beam energy.

Comparison in beam current decay before and after vacuum chamber replacement
Comparison in beam current decay before and after vacuum chamber replacement
Comparison in beam current decay before and after vacuum chamber replacement
Comparison in vacuum pressure before and after vacuum chamber replacement

LOCO analysis

The estimation and correction of the beam optics errors in the operational storage ring is always vital to achieve the design performance. To achieve this task, a method based on linear optics from closed orbit (LOCO) is used in Indus-2 storage ring. In this technique, based on the response matrix fit, errors in the quadrupole strengths, BPM gains, orbit corrector calibration factors etc. are obtained. The methods based on Gauss-Newton and Levenberg Marquadt are used for fitting. For correction of the optics, suitable changes in the quadrupole strengths are applied through the changes in currents of the 26 quadrupole power supplies to achieve the desired optics. The beta function and betatron tunes before and after optics correction are shown in figure. Betabeat, which is the relative deviation of the beta function, has been reduced to better than 1% from uncorrected values of ~9% in horizontal and ~ 6% in vertical plane. After the optics correction, the performance of the storage ring is improved in terms of beam accumulation, reduced beam loss during energy ramping, and beam lifetime etc.

Betatron function in both horizontal and vertical planes before and after applying the LOCO correction.
Tune diagram up to the 5th order resonances. At 2.5 GeV, the theoretical betatron tune is shown by a plus symbol, the square and the diamond symbols show the measured betatron tunes before and after optics correction using 26 quadrupole power supplies. The corrected betatron tune matches very closely to the theoretical model value.
Betatron function in both horizontal and vertical planes before and after applying the LOCO correction.
Tune diagram up to the 5th order resonances. At 2.5 GeV, the theoretical betatron tune is shown by a plus symbol, the square and the diamond symbols show the measured betatron tunes before and after optics correction using 26 quadrupole power supplies. The corrected betatron tune matches very closely to the theoretical model value.

Betatron coupling

The achievement of bright beam with a better lifetime are one of the challenges in designing synchrotron radiation sources. In a real machine, there may exist rotation error about the longitudinal axis in normal quadrupoles and because of that the electron displaced in horizontal plane experience an extra force in vertical plane and vice-versa. Due to this coupling phenomena between horizontal and vertical motion of electrons, it give rise to vertical emittance in storage ring. The rotated quadrupole in dispersive region will give rise to vertical dispersion and due to this, there is also an increase in vertical beam emittance. For getting bright beam, vertical emittance should be minimum. Betatron coupling and residual vertical dispersion has been measured in Indus-2 storage ring. The measurements of betatron coupling was carried out using tune split method and using Cross Talk Closed Orbit (CTCO) method. The results are shown in figure. The measured betatron coupling was found to be less than 1%.

Betatron coupling measurement using tune split method
Measured vertical dispersion at all BPM locations in Indus-2
Betatron coupling measurement using tune split method
Measured vertical dispersion at all BPM locations in Indus-2

Tune feedback

Betatron tune is a key beam parameter, and a fixed desired tune is essential in a synchrotron radiation facility. In Indus-2, difficulty was faced in smooth accumulation of beam current and it was observed, shifting of betatron tune in a random manner is the main cause behind it. Thus, to control the shift in tune, a betatron tune feedback system was implemented for which, two appropriate quadrupoles families were identified by analyzing machine response matrix. Tune feedback system is able to control the betatron tune in both the transverse plane within the range of 0.001. This helps in smooth accumulation of beam current in Indus-2 as shown in figure.

a)	Tune feedback OFF
b)	Tune feedback ON
a) Tune feedback OFF
b) Tune feedback ON
Beam current accumulation with tune feedback ON and OFF

Beam instability

For a well-designed electron storage ring, there are two main causes for electron losses; first is due to scattering of particles in the beam with the residual gas molecules and second is due to beam instabilities. While the electron losses due to scattering is a single-particle phenomena leading to a gradual loss of electrons whereas electron losses due to beam instabilities is a multi-particle effect and it can lead to a partial or complete loss of the electron beam. The multi-particle effect arises due to electromagnetic interaction of the high intensity electron beam with its wake fields which are induced due to resistive wall of vacuum chamber, broad band impedance and narrow band impedance of the various storage ring components. The broad band impedance of the ring arises due to non-uniform cross section of the components in the ring like bellows, kickers and beam position indicators whereas narrow band impedance of the ring arises mainly due to RF cavities. The wake fields due to broad band impedance are short range and it causes single bunch instability whereas the wake fields due to narrow band impedance are long ranges and it causes coupled multi-bunch beam instability. In Indus-2 transverse multi-bunch feedback has been installed and is operational whereas longitudinal multi-bunch feedback is to be installed. The longitudinal coupled bunch instabilities arises due to RF cavities higher order modes are suppressed by optimizing the water temperature in the individual RF cavities. With these conditions a beam current ~200 mA at beam energy 2.5 GeV has been stored in Indus-2 storage ring.

Fast ion Instability

Recently, the beam emittance of Indus-2 was reduced to one third of the nominal optics and at this low emittance optics, likelihood of fast beam ion instability (FBII) is being explored using simulation study. FBII is generated due to the cascading interaction of electron beam and ions comes across in the path of the beam. This interaction induces centre of mass oscillation in bunches of electron beam and thus increases its transverse beam size, which spoils the effort made for achieving the low emittance beams. One effective way to suppress this instability is the operation of storage ring with optimized multi-bunch train filling pattern. The study of this phenomenon is being carried out via numerical analysis and particle tracking.

Pinger Magnet

For the nonlinear beam dynamics studies, a pair of pinger magnet will be installed, one for each transverse plane, in Indus-2 storage ring. Pinger magnet is a pulsed dipole magnet which deflects the bunch train in transverse direction with the pulse width comparable to one revolution time period of the beam circulation in the storage ring. The beam will be kicked transversally by means of pinger magnets up to the aperture limit where the magnetic fields of the optics exhibits strong nonlinearities. The excited betatron oscillations around the reference orbit will then be sampled, turn after turn, by beam position monitors (BPM). From the analysis of turn-by-turn data, the nonlinear parameters of Indus-2 storage ring such as dynamic aperture, frequency map analysis (FMA) and resonance driving terms (RDT) will be extracted and will be further optimised.

Harmonic Sextupole

Two families of harmonic sextupole will be accommodated in the dispersion free straight section of Indus-2 lattice in order to enhance the dynamic aperture. A large negative chromaticity is anticipated during the low emittance operation of Indus-2 storage ring due to tight focussing. To avoid single bunch head tail beam instability, the chromaticity needs to be slightly positive leading to high magnetic strength of chromaticity correcting sextupoles. Due to its nonlinear nature the sextupole magnets imposes a limitation on the dynamic aperture which has to be sufficient in order to have good injection efficiency and better beam lifetime.

Low alpha lattice configuration

Low alpha lattice configuration will be used for compressing the electron bunch length in Indus-2 storage ring. Operation of Indus-2 in this configuration will provide Indus-2 synchrotron radiaiton users, an additional tools to perform the frontline experiments with short x ray pulses as well as coherent terahertz radiation. Presently, the low alpha lattices are being evolved and study related to various challenges during operation is being carried out. When alpha is sufficiently reduced, the higher order alpha (momentum dependant) plays a key role in deciding the energy acceptance.

Microtron beam emittance measurement

In a charged particle accelerator, beam, emittance is a very important parameter. Phase space area occupied by the beam is called beam emittance. There are different methods of beam emittance measurement like pepper pot, single slit method, quadrupole scan method etc. Quadrupole scan method is one of the most commonly used methods for beam emittance measurement for lepton injector systems at medium beam energy range in which the beam is not primarily space-charge dominated. In the quadrupole scan method, the rms beam size is measured as a function of the strength of one or more quadrupoles situated upstream to a beam profile monitor (BPM) in a beam transfer line. This method was used to measure the beam emittance of the 20 MeV Microtron in Indus accelerator complex. The measured emittance in horizontal and vertical plane is 1.21mm mrad and 4.16 mm mrad respectively.

Beam optimization with new microtron

First the beam which is coming out from the new microtron was centred in horizontal as well as in the vertical plane using microtron external channel, VSC, HSC and combined function steering magnet located in the beam transport line-1. Beam emittance and Twiss parameters measurement was carried out of this new microtron using quadrupole scan method. Based on the measured values, new beam optics for TL1 was calculated and applied. With this new optics of TL1, a maximum of 6.5 mA accelerated booster current was achieved.

Lattice design for HBSRS

For the high brilliance light source with the aim of achieving brightness > 1022 [ph/sec.mm2. mrad2. (0.1%BW)], in the photon energy range 10-200 keV from insertion devices, the lattice design studies are being performed. The lattice design should satisfy following constraints and challenges:

  • Beam Energy: 6 GeV
  • Warm magnets: the strengths of the magnets must be well within the reasonably achievable
  • More no. of straight sections,
  • Length of straight sections 5-6 [m]
  • Smaller ring size,
  • Minimum Synchrotron Radiation (SR) loss
  • Off axis injection
  • Larger Dynamic Aperture (DA) for on and off momentum particles


  • Such a low emittance storage rings results in large negative chromaticities, and for their correction, strong sextupole magnets are used. The lattice is based on multi-bend achromat concept. These makes the beam dynamic nonlinear and ultimately reduce the available aperture, called dynamic aperture to the beam. Optimization of dynamic aperture is a challenging task and a class of multi-objective and multivariable optimisation. Advanced techniques based on evolutionary algorithms like, genetic algorithms, particle swarm optimization, differential evolution etc are being used. The glimpse of tentative lattice design and optimized dynamic aperture for HBSRS to achieve beam emittance of 150 pm. rad at 6.0 GeV energy is shown in figure.


    Tentative 7BA lattice of HBSRS producing 150 pm.rad beam emittance. Blue rectangles show dipole magnets, red- quadrupole magnets and green- sextupole magnets.
    Tentative 7BA lattice of HBSRS producing 150 pm.rad beam emittance. Blue rectangles show dipole magnets, red- quadrupole magnets and green- sextupole magnets.


    Dynamic aperrture at centre of the stright section calculated using OPA code.
    Dynamic aperrture at centre of the stright section calculated using OPA code.

    Booster Design for HBSRS

    A booster, which will serve as top-up injector for high brilliance synchrotron radiation source is under design. For booster, a 200 MeV linac will serve as a pre-injector. Presently, a modified FODO lattice having a periodicity of 104 has been chosen. The preliminary design provides about 2 nm-rad beam emittance at the top energy with sufficient dynamic aperture and optimal optical properties at straight section for effective extraction. Its lattice functions are shown in figure. Each unit cell contains one bending magnet (BM) integrated with defocusing quadrupole (QD) & defocusing sextupole gradients (SD) and one focusing quadrupole magnet (QF) combined with focusing sextupole gradients (SF). For further adjustment in optics, additional defocusing quadrupole family and sextupole (focusing and defocusing) families are also predicted

    Lattice functions of booster for two unit cells
    Lattice functions of booster for two unit cells

    CTF-3 design at CERN

    CLIC Test Facility-3 (CTF3) is a project of CERN to demonstrate the proof of principle of two beam acceleration scheme, which will be used in future electron positron collider, CLIC. Under DAE-CERN collaboration, optics design of a bunch compressor cum transfer line, namely TL-2 is carried out for CTF3 and the line is shown in figure. This line is able to tune R56 in a very wide range (from -0.25 m to +0.25 m) with suppression of second order aberration T566 in the entire range. Such wide range of tuning and optimization of sextupole scheme to make T566 nearly zero, are some of the important and unique features of this line. On the basis of the optics design, the transport line TL-2 has been installed and commissioned successfully at CERN.

    Optics design of TL-2 for CTF-3
    Optics design of TL-2 for CTF-3


    Publications

    A. Journal Article

    1. Kumar Pradeep, Singh G., Ghodke A. D. , Vaishnav H., Singh P.,
      Dependence of loss rate of electron due to elastic gas scattering on the shape of vacuum chamber ,
      VACUUM 120, 67 (2015)

    2. Sharma Amalendu, Tyagi Deepak Kumar and Ghodke A. D.,
      Optimization of harmonic sextupoles in Indus-2 electron storage ring,
      Nuclear Instruments and Methods in Physics Research A, 782 (2015)

    3. Fakhri Ali Akbar , Kant Pradeep, Singh Gurnam and Ghodke A. D.,
      An analysis of double bend achromat lattice,
      Review of Scientific Instruments, 86, 0333304 (2015)

    4. Fakhri Ali Akbar , Kant Pradeep, Singh Gurnam and Ghodke A. D.,
      Beam emittance reduction during operation of Indus-2,
      Review of Scientific Instruments, 86, 0333304 (2015)

    5. Jena S. K., Husain Riyasat, Gandhi M. L.,  Agrawal R. K., Yadav S.,  Ghodke  A. D.,
      Beam based alignment and its relevance in Indus-2,
      Review of Scientific Instruments. 86, 093303 (2015)

    6. Jena S. K., Ghodke A. D.,
      Observation and mitigation of ion trapping in Indus-2,
      PRAMANA-  Journal of physics Vol. 85, No. 6 (2015)

    7. Husain, Riyasat, Ghodke A. D., Singh G.,
      Optimal placement of the magnets in Indus-2 storage ring,
      Chinese Phys. C, Vol. 39(3) (2015).

    8. Abdurrahim & Ghodke A. D.,
      Effect of undulators on the stored electron beam of Indus-2,
      Chinese Physics C Vol. 39 (7) (2015)

    9. Saini R.S., Tyagi Y., and Puntambekar T. A.,
      Enhancing the Accelerated Beam Current in the Booster Synchrotron by Optimizing the Transport line Beam Propagation.
      PRAMANA- Journal of physics, 2015

    10. Jena S. K., Yadav S., Agrawal R. K., Ghodke A. D., Fatnani P. & Puntambekar T. A.,
      Stabilization of betatron tune in Indus-2 storage ring,
      Chinese Physics C Vol. 38(6) (2014)

    11. Fakhri Ali Akbar, Prajapati S. K., Ghodke A. D. and Singh Gurnam,
      Studies of beam injection with a compensated bump and uncompensated bump in a synchrotron,
      Review of Scientific Instruments, 84, 083303 (2013)

    12.  Sharma Amalendu, Singh P., Abdurrahim, Ghodke A. D. and Singh Gurnam,
      Analytical expressions of transfer functions for a hard edge dipole magnet using a basic geometrical approach ,
      Physical Review Special Topics- Accelerators and Beams, 16, 014001 (2013)

    13. Kumar Pradeep, Ghodke A. D. & Singh G.,
      Beam lifetime measurement and analysis in Indus-2 electron storage ring,
      PRAMANA-  Journal of physics., 80(5), 855 (2013)

    14. Kumar Pradeep, Ghodke A. D., Karnewar A.K., Holikatti A. C., Yadav S., Puntambekar T.A., Singh G. & Singh P.,
      Measurements of aperture and beam lifetime using movable beam scrapers in Indus-2 electron storage ring,
      Review of Scientific Instruments. 84, 123301 (2013)

    15. Husain Riyasat, Ghodke A. D., Yadav S., Holikatti A. C., Yadav R. P., Fatnani P., Puntambekar T. A. & Hannurkar P. R.,
      Measurement, analysis and correction of the closed orbit distortion in Indus-2 synchrotron radiation source,
      PRAMANA-  Journal of physics., 80, 2 (2013)

    16. Fakhri Ali Akbar , Ghodke A. D. and Singh Gurnam,
      Effect of Wavelength Shifter in Indus-1,
      Nuclear Instruments and Methods in Physics Research A, 613 (2010)

    17. Ghodke A. D., Husain Riyasat, Kumar P., Yadav S. & Puntambekar T. A.,
      Measurement of parameters in Indus-2 synchrotron radiation source,
      Review of Scientific Instruments. 83, 103303 (2012)

    18. Jain V.K., Bhandarkar U.V., Yadav S., Joshi S. C., Ghodke A. D., Lad M., Hannurkar P. R.,
      Estimation of higher order modes of Indus-2 RF cavity using combined electromagnetic-thermal-structural simulations,
      Nuclear Instruments and Methods in Physics Research A,  612, (2010).

    19. Sharma Amalendu, Abdurrahim, Ghodke A. D. and Singh Gurnam,
      Optics design and second order longitudinal dispersion minimization in a bunch compressor transfer line for CTF3,
      Nuclear Instruments and Methods in Physics Research A, 602, Issue 2, (342-351), (2009)

    20. Ghodke A. D., Husain Riyasat, Singh G.,
      Indus-2 commissioning team, Progress in Commissioning of Indus-2,
      ICFA, Beam Dynamics Newsletter No.-41, Dec. (2006)

    21. Singh G.,
      et.al,  Commissioning status of Indus-1 SR facility,
      Indian Journal of Pure &  Applied Physics, 39, (2001)

    22. Angal-Kalinin D., Singh G.,
      Emittance measurements of microtron beam,
      Indian Journal of Pure and Applied Physics, 38 (2000)

    23. Sahoo G. K. and  Singh G. ,
      Design studies of Indus-2 storage ring lattice using the code ESRO,
      Indian Journal of Pure & Applied Physics, 37 (1999)

    24. Bhawalkar D.D., Singh G. & Nandedkar R. V.,
      Synchrotron Radiation Source INDUS-1  and INDUS-2, ,
      Pramana 50 (1998)

    25. Singh G., Angal D., Singh B. and Kant P.,
      Synchrotron Radiation Source Indus-2,
      Indian Journal of Pure and Applied Physics, 35 (1997)

    26. Ramamurthi S. S. & Singh G. ,
      Status of Indus-1 SR source,
      Nuclear Instrumentation Methods A 359  (1992)

    27. Angal D., Singh G. and Ramamurthi S. S.,
      Design of transfer lines for Indus-1,
      Indian Journal of Physics 65 A (6), (1991)

    28. Singh B., Singh G. and Ramamurthi S. S.,
      Injection into the synchrotron for Indus-1 and Indus-2,
      Indian Journal  of Physics 65 A (6), (1991)

    29. Sahoo G.K., Singh G. and Ramamurthi S. S.,
      Variation of beam emittance during acceleration cycle of the synchrotron for Indus-1 and Indus-2,
      Indian J  Physics 65 A (5), (1991)

    30. Singh G., Sahoo G.K. and Ramamurthi S. S.,
      Spectral brilliance of a weak focusing electron storage ring for synchrotron radiation,
      Indian Journal of Physics 62A (1988)

    31. Singh G., Sahoo G.K. and Ramamurthi S. S.,
      Spectral brilliance of a weak focusing electron storage ring for synchrotron radiation,
      Indian Journal of Physics 62A (1988)

    32. Sahoo G.K., Singh G. and Ramamurthi S. S.,
      Beam lifetime calculations for an electron storage ring for synchrotron radiation,
      Indian journal of physics, 62A (1988)

    B. Conference papers

    1. Husain Riyasat, & Ghodke A. D.,
      Indus-2 lattice optimization using multi-objective optimization algorithm
      Indian Particle Accelerator Conference (InPAC), Mumbai, Dec 21-24, 2015.
    1. Husain Riyasat, Jena S. K., Meena V. K., Kant P. K. & Ghodke A. D.
      Beta beat correction and improvement in Indus-2 storage ring performance
      Indian Particle Accelerator Conference (InPAC), Mumbai, Dec 21-24, 2015.
    1. Abdurrahim & Ghodke A. D. et.al.
      Beam Dynamics Studies during Commissioning of Two Undulators in Indus-2
      Indian Particle Accelerator Conference (InPAC), Mumbai, Dec 21-24, 2015
    1. Kumar Pradeep, Ghodke A. D., Singh G. & Singh
      P.Effect of RF phase modulation on longitudinal parameters in Indus-2 electron storage ring
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013
    1. Saini R. S. and Ghodke A. D. 
      Beam optics design of electron beam transport line from proposed injector linac to the booster synchrotron.
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    2. Tyagi Y.*, Saini R.S., Ghodke A. D. & Singh Gurnam
      Development of a Transverse beam emittance and Twiss parameters measurement system for Transport line-1
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    3. Fakhri Ali Akbar & Ghodke A. D.
      Electron Beam Optics of Indus-2 in Presence of Insertion Devices
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    4. Sharma Amalendu and Ghodke A. D.
      Application Program Development and its use in Indus-2
      Indian Particle Accelerator Conference, VECC (InPAC), Kolkata, Nov. 19-22, 2013

    5. Sharma Amalendu, Singh P., Ghodke A. D. & Singh Gurnam
      CSR studies for transfer line-2 at CTF3, CERN
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    6. Husain Riyasat & Ghodke A. D.
      Orbit response matrix analysis in Indus-2 at 2.5 GeV
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    7. Husain Riyasat, Vats D. K. & Ghodke A. D.
      Chromaticity measurement during beam energy ramp in Indus-2
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    8. Jena S., Fakhri Ali Akbar & Ghodke A. D.
      Beam Dynamics Requirement for Proposed Booster Extraction Septum Magnet
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    9. Kant Pradeep, Fakhri Ali Akbar & Ghodke A. D.
      Exploration of tune point for Booster
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    10. Kant Pradeep, Fakhri Ali Akbar & Ghodke A. D.
      Field error tolerances of eddy current thin septum for Indus-2
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, Nov. 19-22, 2013

    11. Fakhri Ali Akbar, Kant P., Ghodke A. D. & Singh G.
      Low emittance electron beam optics commissioning in Indus-2
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    12. Saini R. S., Ghodke A. D. and Singh Gurnam.
      Scheme for Beam Energy Spread Measurement of 20 MeV Microtron. 
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    13. Saini R. S., Biswas B.*, Pant K. K., Ghodke A. D. & Singh Gurnam. 
      Electron Beam Optics Design of Variable Energy Beam Transport Line for a Tunable Infra-Red Free Electron Laser at RRCAT.     
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    14. Prajapati Sanjay Kumar, Fakhri Ali Akbar, Ghodke Ajay. D. and Singh Gurnam
      Modified Bunch Filling Scheme for Indus-2
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    15. Singh G., et al.
      Status of Indus-2 Synchrotron Radiation Source
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    16. Husain Riyasat, Ghodke A. D.  & Singh Gurnam
      Exploring Storage Ring Lattices, Indus-1 & Indus-2
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    17.  Husain Riyasat, Kant Pradeep, Ghodke A. D. & Singh Gurnam
      Beam Dynamics with New Booster Dipoles
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    18. Abdurrahim, Jain V. K., Ghodke A. D. and Singh Gurnam.
      Optimization of Ti Coating Thickness for Indus-2 Injection Kicker Ceramic Chamber
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    19. Jena Saroj, Ghodke A. D. & Singh G.
      Study of Ion trapping phenomena in Indus-2 storage ring
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    20. Saini R. S., Biswas B., Pant K. K., Ghodke A. D. & Singh Gurnam
      Electron beam optics design of variable energy beam transport line for a tunable infra-red free-electron laser at RRCAT
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    21. Kumar Pradeep, Ghodke A. D. & Singh Gurnam
      Studies of beam lifetime in Indus-2 electron storage ring
      Indian Particle Accelerator Conference (InPAC), IUAC, Delhi, Feb., 15-18, 2011

    22. Singh Gurnam, Ghodke A. D. & et al,
      Current status and improvements planned in Indus‐2
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    23. Saini R. S., Ghodke A. D. & Singh Gurnam
      Beam transmission in Beam Transfer Line-3 (TL-3) for Indus-2 storage ring.
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    24. Sharma A, Goyal P. K., Ghodke A. D. and Singh Gurnam.
      Magnet field tolerances of dipole and quadrupole magnets for 1 GeV proton synchrotron
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    25. Abdurrahim, Sharma A, Ghodke A. D. & Singh Gurnam
      Optimization strategy for Transfer Line-2 for CTF3
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    26. Jena S., Ghodke A. D. & Singh Gurnam
      Quadrupole to beam offset determination in Indus-2
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    27. Kant Pradeep, Husain Riyasat, Ghodke A. D. & Singh Gurnam
      Effect of quadrupole fringing field on the tune of Indus-2
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    28. Husain Riyasat, Ghodke A. D. & Singh Gurnam
      Closed orbit correction in Indus-2 using MICADO and SVD algorithms
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    29. Husain Riyasat, Ghodke A. D. &Singh G.
      Tune Dependent Beam Parameters Measurements in Indus-2
      Indian Particle Accelerator Conference (InPAC), RRCAT, Indore, Feb 10-13, 2009

    30. Sharma A., Ghodke A. D., Abdurrahim & Singh G.
      Design of the Transfer line-2 for the CTF-3 at CERN
      Asian Particle Accelerator conference (APAC), RRCAT, Indore, Jan 29- Feb 02, 2007

    31. Husain R., Ghodke A. D. & Singh G.
      Analysis and correction of the measured COD in Indus-2
      Asian Particle Accelerator conference, RRCAT (APAC), Indore, Jan 29- Feb 02, 2007

    32. Singh G., et al.
      Indus-2: Machine Performance and Improvement studies,
      Indian Particle Accelerator Conference, Mumbai (InPAC), November 1-4, 2006

    33. Riyasat Husain, Fakhri A. A., Ghodke A. D. & Singh G.
      Four Orbit Bump and Injection Software for Indus-2 storage ring
      Indian Particle Accelerator Conference (InPAC), Mumbai, November 1-4, 2006

    34. Husain R., Ghodke A. D. & Singh G.
      Tracking through Injection Septa and Indus-2 ring for few turn circulation of the electron beam
      Indian Particle Accelerator Conference (InPAC), Mumbai, November 1-4, 2006

    35. Husain R., Ghodke A. D. & Singh G.
      Variation of the beam emittance and the energy spread during RAMP cycle in the booster synchrotron
      Indian Particle Accelerator Conference (InPAC), Mumbai, November 1-4, 2006

    36.  Kumar Pradeep, Husain R., Ghodke A. D. & Singh G.
      Beam lifetime studies in Indus-2 electron storage ring
      Indian Particle Accelerator Conference (InPAC), Mumbai, November 1-4, 2006

    37. G. Singh, et al.
      Status of Synchrotron Radiation Source Indus-1
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, March 01-05, 2005

    38. Vats D. K., Ghodke A. D. & Singh G.
      Trajectory calculation for the dipole magnets of Indus-2 storage ring
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, March 01-05, 2005

    39. Sharma Amalendu, Ghodke A. D. & Singh G.
      Preliminary non-linear studies of a 1 GeV proton synchrotron for spallation neutron source
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, March 01-05, 2005

    40. Kumar Pradeep, Ghodke A. D. & Singh Gurnam
      Vertical emittance control in Indus-2
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, March 01-05, 2005

    41. Sharma Amalendu, Ghodke A. D. & Singh G.
      Relaxed lattices for commissioning of Indus-2
      Indian Particle Accelerator Conference (InPAC), VECC, Kolkata, March 01-05, 2005

    42. Husain Riyasat, Ghodke A. D. & Singh Gurnam
      Sorting of magnets in Indus-2 storage ring
      DAE-BRNS Symposium on Nuclear Physics, BHU, Banaras, 2004

    43. Fakhri A. A., Ghodke A. D. & Singh G.
      Injection into Indus-2,
      Asian Particle Accelerator conference (APAC), Gyengju, Korea, 2004

    44. Ghodke A. D., Sharma Amalendu & Singh G.
      Lattice design of a 1 GeV proton synchrotron
      Asian Particle Accelerator conference (APAC), Gyengju, Korea, 2004

    45. Singh G., et al.
      Status of Indus-2 Synchrotron Radiation Source
      Indian Particle Accelerator Conference (InPAC), Indore, Feb 2003

    46. Singh G., et al.
      Synchrotron radiation source Indus-1 
      Indian Particle Accelerator Conference (InPAC), Indore, Feb 2003

    47. Ghodke A. D., Walia A. A. S., Singh Gurnam, & Bhujle A.G.
      INDUS-2 orbit control – Algorithms and strategies
      Indian Particle Accelerator Conference (InPAC), Indore, Feb 2003

    48. Kumar Pradeep, Ghodke A. D. & Singh Gurnam
      Linear betatron coupling and decoupling in INDUS-2 storage ring
      Indian Particle Accelerator Conference (InPAC), Indore, Feb 2003

    49. Kumar Pradeep, Ghodke A. D. & Singh Gurnam
      Closed Orbit Correction in INDUS-2 Storage ring using Singular Value Decomposition
      Technique
      Indian Particle Accelerator Conference (InPAC), Indore, Feb 2003

    50. Sahoo Gajendra Kumar, Amalendu Sharma, Ghodke Ajay D. and Singh G.
      Preliminary Lattice for 1 GeV Proton Synchrotron
      Indian Particle Accelerator Conference (InPAC), Indore, Feb 2003

    51.  Kumar Pradeep, Ghodke A. D. & Singh G.
      Effect of linear betatron coupling on amplitude beta function in Indus-2 storage ring
      Proceeding of DAE-BRNS symposium on Nuclear Physics, Vol 46 B, BARC, Mumbai, 2003

    52. Ghodke A. D., et al.
      Status of Indus-1 synchrotron radiation source
      Asian Particle Accelerator conference (APAC), China, 2001

    53.  Fakhri A. A., Ghodke A. D. & Singh G.
      Local orbit correction scheme for the storage ring Indus-2
      DAE-BRNS Symposium on Nuclear Physics, Kolkata, 26-30 Dec. 2001

    54. Sahoo G. K., et al.
      Commissioning of the Indus-1 storage ring
      European Particle Accelerator Conference (EPAC), Vienna, June 2000

    55. Ghodke A. D., Fakhri A. A. & Singh G.
      Beam Position Stability in Indus-2 Storage ring
      International Symposium on Nuclear Physics, BARC, Mumbai, India, 18 -22 Dec. 2000,

    56. Sahoo G.K., Ghodke A. D. & Singh G.
      Study of Indus-2 Lattice with finite dispersion
      Asian Particle Accelerator conference (APAC), Tsukuba, Japan, Mar., 23-27, 1998

    57. Sahoo G. K., Kalinin D. A., Ghodke A. D. , Kant P., Singh B., Singh G.
      Commissioning of synchrotron of Indus1 synchrotron radiation facility 
      CERN Accelerator School, Gjovik, Oslo, Norway, Sep., 1-12, 1997

    58. Kalinin D.A., Ghodke A. D., Singh G. 
      Collective beam instabilities in booster synchrotron 
      Physics and Technology of Particle Accelerators and Their Applications, Calcultta, Nov., 26-29, 1996

    59. Ghodke A. D., Singh G., Ramamurthi S.S.
      Trajectory calculations for dipole magnets of 700 MeV synchrotron
      IIIrd National seminar on physics and technology of particle accelerators and their applications (PATPAA-93), Calcutta, Nov., 25-27, 1993

    60. Singh G., Sahoo G.K., Ghodke A. D., Ramamurthi S.S. 
      Design features of Indus-2 
      International Conference on Synchrotron Radiation Sources, CAT, Indore, India, Feb., 3-6, 1992

    61. Ghodke A. D., Singh G., Ramamurthi S.S. 
      The closed orbit distortion and its correction in Indus-1 
      International Conference on Synchrotron Radiation Sources, CAT, Indore, India, Feb., 3-6, 1992

    62. Singh G., Sahoo G.K., Kalinin D.A., Singh B., Ghodke A. D., Ramamurthi S.S. 
      Design of Indus-I 
      Indo-USSR seminar on SRS physics technology and engineering, CAT Indore, India, Jan., 30-Feb.02, 1989

    C. Internal Reports

    1. Sharma Amalendu, Goyal P. K., Kumar Vinit & Ghodke A. D.
      Preliminary lattice design of Accumulator Ring for Indian Spallation Neutron Source
      RRCAT/ 2014-02

    2. Jena S. K. & Ghodke A. D.
      Investigation of Ion Trapping and its Cure for Indus-2 Storage Ring,
      RRCAT/2012-07

    3. Kant Pradeep, Fakhri Ali Akbar , Ghodke A. D. & Singh Gurnam
      Study of Dynamic Aperture of Booster Synchrotron at Injection with New Magnets
      RRCAT/2012-06

    4. Husain Riyasat, Ghodke A. D. & Singh G.
      Chromaticity and Central RF Frequency Measurements in Indus-2
      RRCAT/2012-01

    5. Sharma Amalendu, Vats Deepak Kumar, Ghodke A. D. & Singh Gurnam
      Application software MEI (MAD Extended Interface) and its use in nonlinear beam dynamics studies of Indus-2
      RRCAT/2011-04

    6. Kumar Pradeep, Ghodke A. D. & Singh G.
      Effect of closed orbit correction on stored beam lifetime in Indus-2 electron storage ring at beam energy 2 GeV
      RRCAT/2011-03

    7. Kumar Pradeep, Ghodke A. D., Singh G.
      Measurement of beam lifetime in Indus-1 electron storage ring
      RRCAT/2010-12

    8. Hussain Riyasat, Ghodke A. D. & Singh Gurnam
      Indus-2 Tune measurement/ correction during beam energy ramp COD measurement/correction at injection and at 2.0 GeV
      RRCAT/2010-10

    9. Hussain Riyasat, Ghodke A. D. & Singh G. 
      Tune variation during ramp cycle in booster synchrotron
      RRCAT/2006-14

    10.  Hussain Riyasat, Ghodke A. D. & Singh G.
      Ramp software upgradation and beam energy ramp to 2 GeV
      RRCAT/2006-13

    11. Hussain Riyasat, Ghodke A. D. & Singh G.
      COD correction algorithms for Indus-2 ring
      RRCAT/2006-12

    12. Husain Riyasat, Ghodke A. D. & Singh G.
      Beam emittance, energy spread and beam size variation during ramp cycle in booster synchrotron
      RRCAT/2006-11

    13. Sharma Amalendu, Rahim A., Ghodke A. D. & Singh Gurnam
      Design of optics and beam transport in Transfer Line – 2 of CLIC Testing Facility – 3 at CERN
      RRCAT/2006-10

    14. Sharma Amalendu, Rahim A., Ghodke A. D. and Singh Gurnam
      Preliminary beam optics design of Transfer Line – 2 for CLIC Testing Facility – 3 of CERN
      RRCAT/2006-09

    15. Saini R.S., et al.
      Commissioning of Beam Transport Line-3
      CAT/2005-13

    16. Sharma Amalendu, Ghodke Ajay D. and Singh G.
      Working point selection based on nonlinear studies of Indus-2
      CAT/2005-11

    17. Sharma Amalendu, Ghodke A. D. & Singh G.
      Relaxed optics for commissioning of Indus-2
      CAT/2004-05

    18. Husain Riyasat, Ghodke A. D. & Singh G.
      Sorting strategy of dipoles and quadrupoles in Indus-2
      CAT/2004/06

    19. Abdurrahim, Husain Riyasat, Ghodke A. D. and Singh Gurnam.
      Chromaticity Correction Package in Indus-2
      CAT/2005-09

    20. Saini R. S., Ghodke A. D.  & Singh Gurnam.
      Preliminary design aspects of a beam transfer line from 50 MeV electron linac to the booster synchrotron.
      CAT /2005-14

    21. Saini R. S., Ghodke A. D., Singh G. & et al
      Commissioning of Beam Transfer Line-3
      CAT/2005-13

    22. Husain Riyasat, Ghodke A. D. & Singh Gurnam
      Current setting software for Indus-2 Magnets
      CAT/2005-08

    23. Jena S. K., Husain, Riyasat, Ghodke A. D., Singh G.
      Tune Correction in Indus-2
      CAT/2005-12.

    24. Husain Riyasat, Ghodke A. D. & Singh Gurnam
      Final placement of magnets in Indus-2
      CAT/2005-07

    25. Kumar Pradeep, Ghodke A. D. & Singh Gurnam
      Vertical emittance control in Indus-2 electron storage ring
      CAT/2005-1.

    26. Vats D. K., Ghodke A. D. & Singh G.
      Trajectory calculation for Indus-2 dipole magnets
      CAT/2004-21

    27. Saini R.S., Ghodke A. D.  & Singh Gurnam
      Preliminary Design Aspects of a High Energy Beam Transfer Line (HEBT) from a 100 MeV H¯ LINAC to a 1 GeV Synchrotron.
      CAT /2004-04

    28. Kant P., et al.,
      Studies of dynamic aperture for Synchrotron Radiation Source, INDUS-2,
      CAT/2002-17

    29. Kumar Pradeep, Ghodke A. D. & Singh G.
      Analysis of Linear Betatron Coupling and its Correction for Indus-2 electron storage ring
      CAT-2002-15

    30. Kumar Pradeep, Ghodke A. D. & Singh G.
      Studies of Transverse coupling and its correction for Indus-2 storage ring
      CAT/2001-12

    31. Kumar Pradeep, Ghodke A. D. & Singh G.
      Spectral decomposition of closed orbit distortion and its correction through the analysis of Singular value decomposition for Indus-2 storage ring
      CAT/2000-13

    32. Fakhri A. A., Ghodke A. D. and Singh G.,
      Study of beam position stability for storage ring Indus-2
      CAT/2000-02

    33. Sahoo G.K., Kumar P. and Singh G.,
      Determination of dynamic aperture for Indus-2
      CAT/99-10

    34. Kumar P., Sahoo G K. and Singh G.,
      Effect of coupled synchro-betatron oscillations in Indus-2
      CAT/99-14

    35. Fakhri A. A., Singh B. and Singh G.
      Effects of insertion devices on betatron functions and betatron tunes and method of correction for Indus-2
      CAT/98-6

    36. Singh B., and Singh G
      Effects of insertion devices on beam dynamics of Indus-2
      CAT/98-7

    37. Singh B., and Singh G,
      Modified injection scheme for Indus-1
      CAT/98-8

    38. Singh B., and Singh G, & Ghodke A D
      5T wiggler for Indus-1 and Indus-2
      CAT/98-9

    39. Kant Pradeep, Angal D. and Singh G.
      Design of transfer line for radiotherapy microtron
      CAT/97-1

    40. Ghodke A. D., Angal D. and Singh G.
      Studies of collective effects in booster synchrotron
      CAT/96-5

    41. Singh B., and Singh G, Ramamurthi S. S.
      Scheme of injection in Indus-2
      CAT/I/93-3

    42. Singh B., and Singh G, Ramamurthi S. S.
      Nonlinear dynamics with sextupoles in Indus-2
      CAT/I/93-2

    43. Ghodke A D, Singh G and Ramamurthi S S
      Flux and brightness calculations of Indus-2
      CAT/I/92-5

    44. Angal D, Singh G and Ramamurthi S S
      Ion trapping studies for Indus-1
      CAT/I/91-4

    45. Singh G and Ramamurthi S S
      Reduction of beam emittance of an electron storage ring by combination of focusing and defocusing gradient in bending magnets

    46. Ghodke A. D., Singh G. & Ramamurthi S.S.
      Correction of closed orbit distortion in booster synchrotron and Indus-I
      CAT/I/90-3

    47. Ghodke A. D., Singh G. & Ramamurthi S.S.
      Calculation of closed orbit distortion in the synchrotron and Indus-I
      CAT/I/90-7

    48. Angal D, Singh G and Ramamurthi S S,  
      Stability requirement of magnet power supplies of Indus-1
      CAT/I/89-7

    49. Singh G., Sahoo G. K., Kalinin D. A., Singh B., Ghodke A. D.
      Conceptual design of INDUS-I Beam Dynamics considerations
      88/CAT/EAP/30000/0001/D

    Group Members

    1 Shri A.D. Ghodke SOH
    2 Shri Pramod Radheshyam SOG
    3 Shri Ali Akbar Fakhri SOF
    4 Dr. Pradeep Kumar SOF
    5 Shri Riyasat Husain SOF
    6 Shri Abdurrahim SOF
    7 Shri Saroj Kumar Jena SOE
    8 Shri Pradeep Kant SOE
    9 Shri Deepak Kumar Tyagi SOD
    10 Shri Vijay Kumar Meena SOD
    11 Shri Debasis Sinhamahapatra SOD
    12 Shri Sanjay Kumar Prajapati SAD

    For more details, please contact:

    Shri A.D. Ghodke
    Head, Accelerator Physics Section
    Phone: +91-731-248-2701
    Fax: +91-731-248-8046
    Email: ghodke (at) rrcat.gov.in
    Content Manager: Sh. Saroj Kumar Jena
    Email: s_jena (at) rrcat.gov.in

    Last updated: September 2017
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