IBIC2015 - List of Authors (Yamamoto, K.)

Paper	Title	Page
MOPB021	Signal Response of the Beam Loss Monitor as a Function of the Lost Beam Energy	80
	K. Yamamoto JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
	The J-PARC 3 GeV rapid cycling synchrotron (RCS) accelerates a proton beam up to 3GeV and delivers it to the main ring and the Material and Life Science Experimental Facility. The injection energy of the RCS was 181 MeV since 2013, and it was upgraded to 400 MeV in 2014. Main magnets (dipole and quadrupole magnets) of the RCS have large aperture, and thickness of yoke is larger than 200 mm. Considering the stopping power of a proton, the shielding effect of the magnets strongly depends on the lost beam energy. When the beam loss occurs during injection, the lost proton cannot penetrate the magnet yoke. But when the beam loss occurs after acceleration, the lost beam easily passes the magnet. Therefore the signal response of the beam loss monitor is changed even if the loss power is the same. To evaluate the amount of the lost particles from BLM response, we estimated the signal dependence on the lost energy from simulation.
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

Paper

Title

Page

Signal Response of the Beam Loss Monitor as a Function of the Lost Beam Energy

80

K. Yamamoto
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan

The J-PARC 3 GeV rapid cycling synchrotron (RCS) accelerates a proton beam up to 3GeV and delivers it to the main ring and the Material and Life Science Experimental Facility. The injection energy of the RCS was 181 MeV since 2013, and it was upgraded to 400 MeV in 2014. Main magnets (dipole and quadrupole magnets) of the RCS have large aperture, and thickness of yoke is larger than 200 mm. Considering the stopping power of a proton, the shielding effect of the magnets strongly depends on the lost beam energy. When the beam loss occurs during injection, the lost proton cannot penetrate the magnet yoke. But when the beam loss occurs after acceleration, the lost beam easily passes the magnet. Therefore the signal response of the beam loss monitor is changed even if the loss power is the same. To evaluate the amount of the lost particles from BLM response, we estimated the signal dependence on the lost energy from simulation.

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)