With the energy upgrading of LINAC (Linear accelerator) to 400 MeV in the J-PARC (Japan Proton Accelerator Research Complex) [1, 2], a new power supply of the injection bump magnet [3 6] has been designed for the 3-GeV RCS (Rapid Cycling Synchrotron) [7, 8]. The new power supply of the shift bump-magnet (SB magnet) [9, 10] is composed with the capacitor bank which has function to form the output current pattern. This power supply is a commutation strategy using the electrical charge and discharge of the capacitor, and the frequency of the switch that becomes the source of the noise is a little. Comparing to the conventional switching-type power supply, this power supply is switched only three times for the pattern formation. Thus, the ripple due to the switching can be expected to be much lower. The 1/16 scale model was manufactured and the characteristics was evaluated. This paper summarizes the design parameter and the experimental result of the new power supply.
[1]
Y. Watanabe,et al.
UPGRADE DESIGN OF THE BUMP SYSTEM IN THE J-PARC 3-GeV RCS
,
2011
.
[2]
Hiroyuki Harada,et al.
Beam commissioning of the 3-GeV rapid cycling synchrotron of the Japan Proton Accelerator Research Complex
,
2009
.
[3]
H. Someya,et al.
Improvement of the Shift Bump Magnetic Field for a Closed Bump Orbit of the 3-GeV RCS in J-PARC
,
2008,
IEEE Transactions on Applied Superconductivity.
[4]
Y. Yamazaki,et al.
Design of the Shift Bump Magnets for the Beam Injection of the 3-GeV RCS in J-PARC
,
2006,
IEEE Transactions on Applied Superconductivity.