| Paper |
Title |
Page |
| TUP85 |
J-PARC Linac Alignment
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474 |
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- M. Ikegami, C. Kubota, F. Naito, E. Takasaki, H. Tanaka, K. Yoshino
KEK, Ibaraki
- H. Ao, T. Itou
JAERI/LINAC, Ibaraki-ken
- K. Hasegawa, T. Morishita, N. Nakamura, A. Ueno
JAERI, Ibaraki-ken
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J-PARC linac consists of a 3 MeV RFQ linac, a 50 MeV DTL (Drift Tube Linac), a 190 MeV SDTL (Separate-type DTL), and a 400 MeV ACS (Annular-Coupled Structure) linac, and its total length is more than 400 m including the beam transport line to the succeeding RCS (Rapid Cycling Synchrotron). In high-current proton accelerators, precise alignment of accelerator components is indispensable to reduce uncontrolled beam loss and beam quality deterioration. In this paper, planned schemes for the linac alignment is presented together with instrumentation for the long-term ground-motion watching.
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| THP89 |
Measured RF Properties of the DTL for the J-PARC
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809 |
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- H. Tanaka, T. Kato, F. Naito, E. Takasaki
KEK, Ibaraki
- H. Asano, T. Morishita
JAERI, Ibaraki-ken
- T. Itou
JAERI/LINAC, Ibaraki-ken
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RF properties of the second DTL tank for J-PARC have been measured in KEK. The required flatness and stability of the accelerating field of the tank have been achieved by the tunung of the post-couplers, whose shape were modified to adjust the resonant frequency ?324 MHz). Because the third DTL tank has assembled, the rf measurement and the post-coupler tuning will be started soon. Thus the measured results for both tanks will be described in the paper.
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