Beam test of the CERN PSB wide-band RF system prototype in the J-PARC MR

Tamura, Fumihiko   ; Omori, Chihiro*; Yoshii, Masahito*; Hasegawa, Katsushi*; Paoluzzi, M.*

In the framework of the LHC Injectors Upgrade project (LIU), a complete replacement of the existing narrow-band rf systems of CERN PS with wide-band magnetic alloy (MA) loaded rf systems is in progress. A single gap MA loaded rf system prototype, which uses solid-state power amplifier and includes fast rf feedback for beam loading compensation, has been installed in the J-PARC MR to investigate the system behavior with high intensity proton beams. We report the wake voltage measurement results with and without fast rf feedback. In addition to the fast feedback, the rf feed forward method is under consideration to compensate the heavy beam loading more effectively. Preliminary beam test results with feed forward are also presented.