Proceedings of the 5th Annual Meeting of Particle Accelerator Society of Japanand the 33rd Linear Accelerator Meeting in Japan (August 6-8, 2008, Higashihiroshima, Japan)

Beam Energy Measurement at J-PARC LINAC,A)

B)

A)

A)

A)

Susumu Sato 1 , ZenEi Igarashi , Tetsuo Tomisawa , Akihiko Miura , Akira Ueno ,A)A)
A)A)
Hiroyuki Sako , Takatoshi Morishita , Yasuhiro Kondo , Guobao Shen ,B)
B)
B)
B)
Hisashi Akikawa , Masanori Ikegami , Takeshi Toyama , Seishu Lee ,A)
JAEA, J-PARC center
2-4 Shirakata-Shirane, Tokai, Ibaraki, 319-1195
B)
KEK, J-PARC center
1-1 Oho, Tsukuba, Ibaraki, 305-0801
AbstractIn the J-PARC LINAC, beam energy is measured with the Fast Current Monitor (FCT), which uses a Finemet core.
Simplest way is to measure the time-of-flight, which is calculated from measured phase, for a pair of FCTs. Other wayof measurement of beam energy is from dispersion measurement in the RCS (Rapid Cycle Synchrotron), or fromcirculation frequency of RCS. In this paper, a study for comparisons is reported. Also, trial to measure energy gain bysingle FCT is reported.

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Proceedings of the 5th Annual Meeting of Particle Accelerator Society of Japanand the 33rd Linear Accelerator Meeting in Japan (August 6-8, 2008, Higashihiroshima, Japan)

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[1] J-PARC Design Report(JAERI-Tech 2003-044, KEK Report
2002-13)[2] S. Sato, et al. Installation of Beam Monitor Sensors in the
LINAC Section of J-PARC. EPAC’06pp.1151-1153 (2006).
[3]    ¨u¶~TK@HD
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