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THALLIUM BEAM TUBE RESEARCH.
VARIAN ASSOCIATES BEVERLY MASS
Several hot wire ionizers were tested, including oxidized and carbonized tungsten and iridium. Tests up to now fail to confirm the large ionization efficiency of iridium for thallium reported by Shipley. No ionizers of reasonable efficiency have yet been found except for the well-known oxidized tungsten hot wire ionizer. A test cylindrical cavity whose central rod is supported by an uncoated quartz continuation has been designed. A prototype quadrupole magnet has been designed and ordered. Beam optics calculations have been completed. Author
Quarterly progress rept. no. 2, 1 Oct-31 Dec 64,