Author: Grillenberger, J.
Paper Title Page
MOPPT004 Status and Further Development of the PSI High Intensity Proton Facility 37
  • J. Grillenberger, J.M. Humbel, A.C. Mezger, M. Seidel, W. Tron
    PSI, Villigen PSI, Switzerland
  The High Intensity Proton Accelerator Facility of the Paul Scherrer Institut is routinely operated at an average beam power of 1.3 MW. Since the last cyclotron conference several highlights have been achieved. The maximum current extracted from the 590 MeV Ring Cyclotron could be increased from 2.2 mA to 2.4 mA during several beam development shifts. Furthermore, the availability of the facility has reached its highest level to date, beyond 93%. The new neutron source UCN which utilizes the full proton beam in pulsed mode, has been commissioned. To ensure reliable operation in the years to come and to further increase the intensity, an upgrade and refurbishment program is under way. Important parts of this program are the replacement of two resonators in Injector II and the installation of new RF amplifiers.  
TH1PB02 Tuning of the PSI 590 MeV Ring Cyclotron for Accepting and Accelerating a Rebunched 72 MeV Proton Beam 437
  • J.M. Humbel, C. Baumgarten, J. Grillenberger, W. Joho, H. Muller, H. Zhang
    PSI, Villigen PSI, Switzerland
  In the past year the production of a 1.42 MW proton beam at a relative loss level of 10-4 at PSI’s proton facility became routine operation. In addition, the inaugurated buncher based beam injection into the 590 MeV Ringcyclotron made a remarkable step forward. In particular, an almost dispersion free setting of the beamline region around the 500 MHz rebuncher in the 72 MeV transfer line has been established and a perfect matching of the dispersion into the Ringcyclotron has been achieved. This buncher-operation optimized facility setting could be advanced up to the ordinary stable standard 2.2 mA production proton beam. With the buncher voltage turned on, at the moment the beam extracted from the Ringcyclotron is limited to below 1 mA due to raising losses, mainly generated by space charge induced distortions of the beam bunches. For a better understanding of these effects a substantial effort in modelling of the accelerated beam is under way. In particular, the influence of the trim coil fields is being implemented into the OPAL simulation code and the insertion of an additional time structure measurement probe in the Ringcyclotron is proposed.  
slides icon Slides TH1PB02 [9.281 MB]