• V. Nanal, R.D. Deshpande, J.N. Karande, S.S. Jangam, P. Dhumal, R.G. Pillay, M.S. Pose, C. Rozario, S.K. Sarkar, S.R. Sinha
  TIFR, Mumbai
• S.K. Singh, B. Srinivasan
  BARC, Mumbai

The su­per­con­duct­ing LINAC boost­er, in­dige­nous­ly de­vel­oped to boost the en­er­gy of the heavy ion beams from the 14 MV Pel­letron ac­cel­er­a­tor at TIFR, Mum­bai, has been fully op­er­a­tional since July 2007. The LINAC con­sists of seven mod­u­lar cryostats, each hous­ing four lead plat­ed quar­ter wave res­onators, de­signed for an op­ti­mum ve­loc­i­ty β₀=0.1 at an op­er­at­ing fre­quen­cy of 150 MHz. In order to main­tain a sta­ble phase and am­pli­tude of the elec­tric field in the cav­i­ty, the RF con­troller cards based on a self-ex­cit­ed loop (SEL) with phase and am­pli­tude feed­back have been de­vel­oped in­dige­nous­ly. The cryo­genic sys­tem for the LINAC has been de­signed for a typ­i­cal power dis­si­pa­tion of 6 W in each res­onator. Ini­tial beam tri­als have yield­ed av­er­age en­er­gy gain of 0.4 MV/q per cav­i­ty cor­re­spond­ing to 80% of the de­sign value. Op­er­a­tional ex­pe­ri­ence of the LINAC, name­ly, em­pir­i­cal­ly de­vised pro­ce­dures for the ac­cel­er­a­tion of dif­fer­ent beams and RF set­tings, and as­so­ci­at­ed de­vel­op­ments are pre­sent­ed.

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