Superconducting linac booster to NSC pelletron

Nuclear Science Centre (NSC) is an autonomous organization of the University Grants Commission to provide accelerator based research facilities to universities and associated institutions. It has been running as a user facility since July 1991 with a 15 million volt tandem Pelletron accelerator. The user community presently comprises of 48 universities and large number of colleges and other institutions. Phase II augmentation of facilities consists of injecting the Pelletron beams into superconducting heavy ion booster linac modules. Niobium quarter wave resonating structure for the New Delhi booster linac has been developed as a joint project with the Argonne National Laboratory (ANL) in the U.S. A prototype cavity has been completed and operated at 4.2 K at accelerating gradient of about 4 MV/m. Resonators for a linac module having 8 QWR are under fabrication in ANL with parallel efforts for indigenous fabrication. RF instrumentation, computer control, cryostat etc. are designed and some fabrication jobs are completed. Closed loop liquid Helium reliquefication system of 600 watt at 4.5 K and a closed loop liquid nitrogen reliquefication system of 5000 watt at 82 K are commissioned. Accelerator augmentation plans for future are to have a high current injection system for linacs. (author)