• M. Okamura, K. Kondo
  BNL, Upton, Long Island, New York
• T. Kanesue
  Kyushu University, Department of Applied Quantum Physics and Nuclear Engineering, Fukuoka
• H. Kashiwagi
  JAEA/TARRI, Gunma-ken

It was proved that direct plasma Injection Scheme (DPIS) is an efficient way to accelerate high current highly charged state heavy ion beam. More than 50 mA (peak current) of various heavy ion beams were accelerated in BNL, RIKEN and TITech. However, it was rather difficult to obtain longer pulse especially for highly charged particles. To induce highly charged states ions, a high plasma temperature is required at the laser irradiation point and the high temperature automatically gives a very fast expansion velocity of the plasma. This shortens the ion beam pulse length. To compensate the shorter ion pulse length, we can extend the plasma drift length, but it will dilute the brightness of the plasma since the plasma expands three dimensionally. To avoid the reduction of the brightness, a simple long solenoid was applied to confine the diverging angle of the plasma. In the conference, this new technique will be explained and the latest results will be shown.