High Power Model Fabrication of Biperiodic L-Support Disk-and-Washer   Structure
  The high power test model of biperiodic L-support disk-and- washer was fabricated. Among some trouble in the fabrication, the main one was a vacuum leak in a brazing process. The repair test of the leak showed a good result; four units were recovered out of five leak units (recover rate 80%). While an accelerating mode frequency was tuned at an operating frequency of 2857 MHz by squeezing method, a coupling mode frequency of 2847MHz and the 3.4% field flatness (peak to peak ratio) were achieved. 
H. Ao, Y. Iwashita, T. Shirai and A. Noda, M. Inoue, T. Kawakita, K.   Ohkubo and K. Nakanishi