Paper | Title | Other Keywords | Page |
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TH-07 | Operational Experience of the Superconducting LINAC Booster at Mumbai | linac, controls, cavity, acceleration | 174 |
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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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C-07 | Upgrade of the Control System for the ALPI Cryogenic Distribution Plant | controls, linac, vacuum, interlocks | 271 |
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In the LNL Heavy Ion Accelerator Complex, ALPI is a superconducting linear accelerator (Linac) whose first runs date back to 1993. In more than 15 years the LNL ALPI Linac evolved from an initial small configuration of 5 cryostats and 16 resonators to the actual size of 20 cryostats and 74 resonators. The superconducting character of ALPI implies the availability of a large cryogenic plant and distribution system to supply the liquid helium necessary to keep the resonators at 4.2 K. While the Linac structure has grown in the years and, in the mean time, the related cryogenic plant and distribution systems were enlarged and upgraded twice, the related control system remained largely unchanged in its main parts and it is now the first sub-system that urgently needs a deep renewing. The challenge to renovate a working control system with limited shut-downs is the subject of this presentation. |