Head - C. Mallik
Accelerator Physics Section
We are working on a project "Development of high current cyclotron for ADSS" of Department of Atomic Energy, Government of India. In the first phase we are developing a ion source, a low energy beam injection line and a 10 MeV, 5mA compact proton cyclotron to study the injection and extraction related problems associated with high beam intensities.
The main limitation of a compact cyclotron is the acceleration of high intensity beam due to transverse space charge effect at low energy. Transverse space charge force increases the beam size and reduces the free axial focusing frequency available from the electromagnetic field. If this reduction is significant axial beam loss could occur.
The development of high current cyclotron and transport of beam needs detailed simulation of the beam dynamics including the effect of space charge. This group is involved in the simulation of space charge effect in the beam dynamics using analytical as well as PIC simulation techniques and also studying the beam formation, transport and injection at high current experimentally.
Recent Publications in Journals: 1. Estimation of the transverse space charge limiting current in a compact isochronous cyclotron, V. S. Pandit and P. Sing Babu, Nuclear Instruments and methods in Physics Research, A 523 (2004) 19 – 24. 2. Behavior of space charge dominated beam in a high current compact cyclotron, A, Goswami, P. Sing Babu , V. S. Pandit, Nuclear Instruments and methods in Physics Research, A 562 (2006) 34 – 40. 3. Simulation of beam bunching in the presence of space charge effects, P. Sing Babu, A. Goswami, V. S. Pandit. Nuclear Instruments and methods in Physics Research, A 603 (2009) 222-227. 4. Optimization of sector geometry of a compact cyclotron by random search and matrix methods P. Sing Babu, A. Goswami, P. R. Sarma and V. S. Pandit. Nuclear Instruments and methods in Physics Research, A 624 (2010) 560 - 566. 5. Behavior of space charge dominated beam during longitudinal compression in a bunching system P. Sing Babu, A. Goswami, V. S. Pandit Nuclear Instruments and methods in Physics Research, A 642 (2011) 1- 9. 6. Envelope equations for cylindrically symmetric space charge dominated multi species beam P. Sing Babu, A. Goswami, V. S. Pandit, Physics of Plasmas 18, 103117 ( 2011) 7. Effect of nonuniform radial density distribution on space charge dominated beam bunching P. Sing Babu, A. Goswami, V. S. Pandit, Physics of Plasmas 18, 113104 (2011) 8. Transfer matrix of a Glaser magnet to study the dynamics of non-axisymmetric beam A. Goswami, P. Sing Babu, V. S. Pandit, Nuclear Instruments and methods in Physics Research, A 678 (2012) 14- 20. 9. Investigation on beam envelope oscillations and amplitude growth in a high-current compact cyclotron A. Goswami, P. Sing Babu, V. S. Pandit, Eur. Phys. J. Plus (2012) 127: 47
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| VIJAY SHANKER PANDIT (HEAD) | PARITOSH SING BABU | ANIMESH GOSWAMI | SAURABH SRIVASTAVA |
