Cold Model Test of Biperiodic L-support Disk-and-Washer Linac Structure
Y. Iwashita, A. Noda, H. Okamoto, T. Shirai, and M. Inoue,
Accelerator Laboratory, Nuclear Science Research Facility,
Institute for Chemical Research, Kyoto University,
Gokanosho, Uji, Kyoto 611, JAPAN
Cold model test of a biperiodic L-support Disk-and-Washer linac structure is
performed. Each washer is supported by two L-shaped supports 180¡ apart
azimuthally. The structure is a variant of the biperiodic 4-T support DAW.
Because the coupling-mode frequency is pushed up by the supports, it should be
compensated to coincide with the accelerating frequency. The biperiodic supports
also break the uniformity of the field distribution on the axis. The compensation
methods against these perturbations are described.
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