| Paper |
Title |
Page |
| MOP18 |
Cold-Model Tests and Fabrication Status for J-PARC ACS
|
75 |
| |
- H. Ao, H. Akikawa
JAERI/LINAC, Ibaraki-ken
- K. Hasegawa, A. Ueno
JAERI, Ibaraki-ken
- N. Hayashizaki
TIT, Tokyo
- M. Ikegami, S. Noguchi
KEK, Ibaraki
- V.V. Paramonov
RAS/INR, Moscow
- Y. Yamazaki
J-PARC, Ibaraki-ken
|
|
| |
The J-PARC (Japan Proton Accelerator Research Complex) LINAC will be commissioned with energy of 181-MeV using 50 keV ion source, 3 MeV RFQ, 50 MeV DTL and 181 MeV SDTL (Separated DTL) on September 2006. It is planed to be upgraded by using 400 MeV ACS (Annular Coupled Structure), which is a high-beta structure most suitable for the J-PARC, in a few years from the commissioning. The first ACS cavity, which will be used as the first buncher between the SDTL and the ACS, is under fabrication. Detailed design and tuning procedure of ACS cavities has been studied with RF simulation analysis and cold-model measurements. The results of cold-model measurements, fabrication status, and related development items are described in this paper.
|
|
| TUP21 |
Beam Dynamics Design of J-PARC Linac High Energy Section
|
339 |
| |
- M. Ikegami, T. Kato, S. Noguchi
KEK, Ibaraki
- H. Ao, Y. Yamazaki
JAERI/LINAC, Ibaraki-ken
- K. Hasegawa, T. Ohkawa, A. Ueno
JAERI, Ibaraki-ken
- N. Hayashizaki
TIT, Tokyo
- V.V. Paramonov
RAS/INR, Moscow
|
|
| |
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. Recently, the beam dynamics design of the ACS part has been slightly modified to reduce construction cost. Namely, the number of klystron modules are reduced from 23 to 21, and the number of accelerating cells in one klystron module is increased from 30 to 34 to maintain the total energy gain. This design change curtails the margin for RF power by around 5 %, and the total length of the ACS section is nearly unchanged. The beam matching section between SDTL and ACS is also revised correspondingly. These modifications of the design are described in this paper together with 3D particle simulation results for the new design.
|
|
| TUP85 |
J-PARC Linac Alignment
|
474 |
| |
- 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
|
|
| |
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.
|
|