Development of the 50-Mev DTL for the Jaeri/Kek Joint Project
  An Alvaretz-type DTL, to accelerate the H- ion beam from 3 to 50 MeV, is being constructed as the injector for the JAERI/KEK Joint Project. The following components of the DTL have been developed: (1) a cylindrical tank, made by copper electroforming; (2) rf contactors; (3) a pulse-excited quadrupole magnet with a hollow coil made by copper electroforming; (4) a switching-regulator-type pulsed-power supply for the quadrupole magnet. High-power tests of the components have been conducted using a short-model tank. Moreover a breakdown experiment of the copper electrodes has been carried out in order to study the properties of several kinds of copper materials. 
F. Naito, K. Yoshino, C. Kubota, T. Kato, Y. Saito, E. Takasaki, Y.   Yamazaki (KEK), S. Kobayashi, K. Sekikawa, M. Shibusaw...