Proceedings of the 1st Annual Meeting of Particle Accelerator Society of Japanand the 29th Linear Accelerator Meeting in Japan (August 4 - 6, 2004, Funabashi Japan)

Characteristics of Low Level RF System
for DTL1 Beam Commissioning of J-PARC Linac
T. Kobayashi1, A)

A)

B)

B)

B)

B)

B)

, H. Suzuki , S. Anami , S. Yamaguchi , M. Kawamura , Y. Fukui , E. Kadokura , N.
B)

C)

C)

D)

kamikubota , M. Takagi , S. Yoshida and M. Kawase
A)
Japan Atomic Energy Research Institute (JAERI)
2-4 Shirakata-Shirane, Tokai, Naka, Ibaraki, 319-1195
B)High Energy Accelerator Research Organization (KEK)
1-1 Oho, Tsukuba, Ibaraki, 305-0801
C)
Kanto Information Service Co.,LTD.
8-21, Bunkyo, Tsuchiura, Ibaraki, 300-0045
D)
Mitsubishi Electric System & Service Co.,LTD.
2-8-8, Umezono, Tsukuba, Ibaraki, 305-0045

Abstract
The beam study of the low-energy front of J-PARC linac has been in progress in the KEK site. Last year, DTL1 (thefirst tank of three DTL’s) was installed in addition to RFQ and the Medium Energy Beam Transport line, and the beamcommissioning up to 20MeV has been performed successfully. In this paper, the low level RF (LLRF) System for thisbeam test is summarized and the performance of the RF feed back control system and monitor system of the phase andamplitude of the accelerating fields (324 MHz) is presented. It was found that the feed back system for Bunchers is also
necessary to stabilize and to compensate for the beam induced fields.

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Proceedings of the 1st Annual Meeting of Particle Accelerator Society of Japanand the 29th Linear Accelerator Meeting in Japan (August 4 - 6, 2004, Funabashi Japan)

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