HB2014 - List of Authors (Nakamura, K.G.)

Paper

Title

Page

Performance of Transverse Intra-Bunch Feedback System at J-PAC MR

384

Y.H. Chin, T. Obina, M. Okada, M. Tobiyama, T. Toyama
KEK, Ibaraki, Japan
K.G. Nakamura
Kyoto University, Kyoto, Japan
Y. Shobuda
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan

A new broadband (~100 MHz) feedback system has been developed for suppression of intra-bunch oscillations and reduction of particle losses at the J-PARC Main Ring (MR). A new BPM has been designed and fabricated, based on Linnecar’s exponential coupler stripline type, for a flatter and wider frequency response. The design and performance of the new BPM as well as preparation of a newly installed exciter and power amplifier is presented. We also report beam test results of suppression of horizontal intra-bunch oscillations at 3 GeV with the bunch length of 150-200 ns.

Slides THO3AB01 [6.245 MB]

Paper	Title	Page
THO3AB01	Performance of Transverse Intra-Bunch Feedback System at J-PAC MR	384
	Y.H. Chin, T. Obina, M. Okada, M. Tobiyama, T. Toyama KEK, Ibaraki, Japan K.G. Nakamura Kyoto University, Kyoto, Japan Y. Shobuda JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
	A new broadband (~100 MHz) feedback system has been developed for suppression of intra-bunch oscillations and reduction of particle losses at the J-PARC Main Ring (MR). A new BPM has been designed and fabricated, based on Linnecar’s exponential coupler stripline type, for a flatter and wider frequency response. The design and performance of the new BPM as well as preparation of a newly installed exciter and power amplifier is presented. We also report beam test results of suppression of horizontal intra-bunch oscillations at 3 GeV with the bunch length of 150-200 ns.
	Slides THO3AB01 [6.245 MB]