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Design, construction and status of all niobium superconducting photoinjector at BNL

By: Hershcovitch, A.; Citver, G.; Burrill, A.; Ben-Zvi, I.; Srinivasan-Rao, T.; Kneisel, P.; Pate, D.; Zhao, Y.; Delayen, J.; Zhao, Q.; Scaduto, J.; Reuter, A.;

2003 / IEEE / 0-7803-7738-9

Description

This item was taken from the IEEE Conference ' Design, construction and status of all niobium superconducting photoinjector at BNL ' We present here the design and construction of an all niobium superconducting RF injector to generate high average current, high brightness electron beam. A 1/2 cell superconducting cavity has been designed, built, and tested. A cryostat has been built to cool the cavity to /spl sim/2 K. The RF system can deliver up to 500 W at 1.3 GHz to the cavity. A mode-locked Nd:YVO/sub 4/ laser, operating at 266 nm with 0.15 W average power, phase locked to the RF, will irradiate a laser cleaned Nb surface at the back wall of the cavity. Description of critical components and their status are presented in the paper. Based on DC measurements, QE of up to 10/sup -4/ can be expected from such cavity.