| Paper |
Title |
Page |
| TUPAN056 |
Fabrication Status of ACS Accelerating Modules of J-PARC Linac
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1514 |
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- H. Ao, K. Hirano, T. Morishita, A. Ueno
JAEA/LINAC, Ibaraki-ken
- K. Hasegawa
JAEA, Ibaraki-ken
- M. Ikegami
KEK, Ibaraki
- V. V. Paramonov
RAS/INR, Moscow
- Y. Yamazaki
KEK/JAEA, Ibaraki-Ken
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An ACS (Annular Coupled Structure) cavity has been developed for the J-PARC Linac from 190-MeV to 400-MeV. We fabricated a buncher module with two 5-cell accelerating tanks and one 5-cell bridge tank as the first module. The buncher module is shorter than accelerating module that consists of two 17-cell accelerating tanks and one 9-cell bridge tank. The first buncher module achieved the stable operation of 50 Hz, 600 us, 600 kW in the high-power test, which corresponds to the E0 value of 4.8 MV/m. The second buncher module and three accelerating modules are under fabrication continuously. These results of the frequency tuning and assembling are presented in detail.
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| TUPAN058 |
High Power Conditioning of the DTL for J-PARC
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1517 |
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- T. Ito, H. Asano, T. Morishita
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- H. Ao
JAEA/LINAC, Ibaraki-ken
- T. Kato, F. Naito, E. Takasaki, H. Tanaka
KEK, Ibaraki
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For the J-PARC, DTL (Drift Tube Linac) is used to accelerate an H- ion beam from 3MeV to 50MeV. The DTL consists of 3 tanks and the all tanks were installed in the accelerator tunnel for J-PARC. After the installation, the high power conditioning has been started in Oct. 2006. The required rf power levels for beam acceleration are about 1.08MW, 1.2MW and 1.03MW (the pulse length is 600μsec and the pulse repetition is 25Hz) for the 1st, 2nd and 3rd tanks, respectively. As a result of the conditioning, we have been achieved that the rf power levels are about 1.3MW, 1.45MW and 1.23MW of 1.2 times required power levels (the pulse length is 650μsec and the pulse repetition is 25Hz). In this paper, the results of the high power conditioning of the DTL tanks are described.
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| THPAN043 |
Comparison of Trajectory Between Modeling and Experiment for J-PARC Linac
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3324 |
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- T. Ohkawa, K. Hasegawa
JAEA, Ibaraki-ken
- H. Ao, A. Ueno
JAEA/LINAC, Ibaraki-ken
- M. Ikegami
KEK, Ibaraki
- H. Sako
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
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In the beam commissioning of J-PARC (Japan Proton Accelerator Research Complex) linac, three simulations codes are used to model the accelerator. We have compared with the experimental results obtained in the beam commissioning to date, where a basic agreement has been confirmed between the modeling and the actual beam behavior.
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