| Paper |
Title |
Page |
| THO3A01 |
High Intensity Aspects of J-PARC Linac Including Re-commissioning after Earthquake |
497 |
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- M. Ikegami, K. Futatsukawa, T. Miyao
KEK, Ibaraki, Japan
- Y. Liu
KEK/JAEA, Ibaraki-Ken, Japan
- T. Maruta, A. Miura, J. Tamura
JAEA/J-PARC, Tokai-mura, Japan
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We had a massive earthquake in March 2011, which forced us to shutdown J-PARC accelerators for nearly nine months due to its resultant damages. After significant restoration effort, we resumed the beam operation of J-PARC linac in December 2011 and user operation in January 2012. Subsequently, we restored the same beam power as just before the earthquake in March 2012. In the course of the beam commissioning after the earthquake, we have experienced beam losses which were not observed before the earthquake. We discuss the experimentally observed beam losses and its comparison with particle simulations.
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Slides THO3A01 [5.249 MB]
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| THO3C04 |
Longitudinal Beam Diagnosis with RF Chopper System |
591 |
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- T. Maruta
JAEA/J-PARC, Tokai-mura, Japan
- M. Ikegami
KEK, Ibaraki, Japan
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J-PARC linac has a chopper system between RFQ and DTL, which utilizes an RF deflector cavity instead of a usual slow wave kicker. Taking advantage of this unique feature of the chopper system, we have experimentally measured the longitudinal full width of phase direction at the chopper cavity. In this presentation, I would like to discuss the measurement technique and measurement results.
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Slides THO3C04 [2.495 MB]
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