Acceleration test of TIT-IHQ linac for heavy ion irradiation

We have developed an interdigital-H quadrupole (IHQ) linac for industrial a pplications. This linac was designed to accelerate particles with charge to mass ratio greater than 1/16 from 21.8 up to 145 keV/u. The particles are focused by an electric quadrupole field exited by fingertips on the drift t ubes. This IHQ linac was installed at Tokyo Institute of Technology in 1997 and some tests such as low power tuning and vacuum tests were done. Then, proton acceleration tests ware performed in 1998, and the proton beam was s uccessfully accelerated up to the designed energy. As a result of this expe riment, the effective shunt impedance was determined to be 210 M Omega/m. t he required RF power consumption was 93 W and the beam transmission rate wa s about 9%. In this paper, the results of the high power acceleration test with H+ ion are described. (C) 2000 Elsevier Science B.V. All rights reserv ed.