IBIC2012 - List of Authors (Tanaka, M.)

Paper	Title	Page
TUPB53	Abort Diagnostics and Analysis during KEKB Operation	477
	H. Ikeda, J.W. Flanagan, T. Furuya, M. Tobiyama KEK, Ibaraki, Japan M. Tanaka Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
	KEKB has stopped since June 2010 for upgrading the luminosity 40 times, i.e. SuperKEKB. During the operation of 11 years, a pair of controlled beam abort systems worked more than 10000 times to protect the hardware components of KEKB accelerator and the detector against the high intensity beams of LER and HER. Optimization of the abort trigger was necessary to balance efficient operation with the safety of the hardware. Therefore, we analyzed one-by-one all of the aborts, and continually adjusted the abort system. The diagnostic system was based on a high-sampling-rate data logger that recorded beam currents, RF signals and beam loss monitor signals. The beam oscillation signals, vacuum pressure and detector dose rate were also examined. This paper describes the typical abort causes, optimizations of abort levels, and abort statistics over approximately eight years after having arrived at high beam current operation.

Paper

Title

Page

Abort Diagnostics and Analysis during KEKB Operation

477

H. Ikeda, J.W. Flanagan, T. Furuya, M. Tobiyama
KEK, Ibaraki, Japan
M. Tanaka
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan

KEKB has stopped since June 2010 for upgrading the luminosity 40 times, i.e. SuperKEKB. During the operation of 11 years, a pair of controlled beam abort systems worked more than 10000 times to protect the hardware components of KEKB accelerator and the detector against the high intensity beams of LER and HER. Optimization of the abort trigger was necessary to balance efficient operation with the safety of the hardware. Therefore, we analyzed one-by-one all of the aborts, and continually adjusted the abort system. The diagnostic system was based on a high-sampling-rate data logger that recorded beam currents, RF signals and beam loss monitor signals. The beam oscillation signals, vacuum pressure and detector dose rate were also examined. This paper describes the typical abort causes, optimizations of abort levels, and abort statistics over approximately eight years after having arrived at high beam current operation.