STABLE OPERATION OF RF SYSTEMS FOR RIBF

Abstract

At RIKEN RI-Beam Factory (RIBF), very heavy ion beams like uranium are accelerated up to 345 MeV/u by the RIKEN heavy ion linac (RILAC) and four ring cyclotrons, the RIKEN Ring Cyclotron (RRC), the fixedfrequency ring cyclotron (fRC), the intermediate-stage ring cyclotron (IRC), and the superconducting ring cyclotron (SRC) [1]. In order to provide high intensity beams up to 1 pμA, all the RF systems must be stable enough for a long term (a few weeks) within ± 0.1% in voltages and ±0.1 degrees in phases. For a stable operation of RIBF, we have started to investigate a degree of stability of the RF systems using a newly developed monitoring system [2]. The efforts to improve the stability will be described.IMP;Chinese Academy of Science