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Kim, K.-J.

Paper Title Page
MOPP156 Fabrication and Low Power Testing of an L-band Deflecting Cavity for Emittance-exchange at ANL 916
 
  • J. Shi, H. Chen, W.-H. Huang, C.-X. Tang, D. Tong
    TUB, Beijing
  • W. Gai, C.-J. Jing, K.-J. Kim, J. G. Power
    ANL, Argonne, Illinois
  • D. Li
    LBNL, Berkeley, California
 
  An L-Band RF deflecting cavity has been built at Tsinghua University for a planned transverse-to-longitudinal emittance exchange experiment at Argonne National Laboratory (ANL). The deflector is a 1.3-GHz, 3-cell cavity operated in a TM110-like mode that delivers a deflecting voltage of 3.4 MV. In this paper, we review the cavity design and present detail of the fabrication, cold testing and tuning progress. Cell radii were left undercut to account for simulation errors, which yielded a higher frequency in the first bench measurement but removed by the final tuning on the lathe. Field distribution on axis was measured using the ‘‘bead-pull'' method and tuned to balance in the 3 cells.