J.KUZMINSKI, * K.C.D.CHAN, ** R.L.GENTZLINGER, ** P. MACCIONI***
During 1999, four 700-MHz, medium-beta (beta = 0.64), superconducting radio frequency (SCRF) cavities for a high-intensity proton linac project at Los Alamos National Laboratory (LANL) were manufactured by industry. The SCRF cavities were designed by a LANL team in Los Alamos, New Mexico, USA, and manufactured at a CERCA plant in Romans, France. The cavities were made of 4-mm-thick solid niobium sheets with a residual resistivity ratio greater than 250. These niobium sheets were supplied by Wah Chang (USA), Heraeus AG (Germany), and Tokyo Denkai (Japan). The SCRF cavities were shipped to LANL for performance testing. This paper describes the experience gained during the manufacturing process.
 K. C. D. Chan, G. P. Lawrence, and J. D. Schneider, 'Development of RF Linac for High-Current Applications,' NIM B 139 (1998) 394-400.
 R.Gentzlinger, et al., 'Design, Analysis and Fabrication of the APT Cavities', in Proceeding of the 18th Particle Accelerator Conference, New York, 1999.
* General Atomics, San Diego, USA
** LANL, Los Alamos, USA
*** CERCA, Romans, France
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