| Paper |
Title |
Page |
| MOP14 |
Development of Intense Beam Proton Linac in China
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63 |
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- S. Fu, S.X. Fang, H. Ouyang, S. Zhao
IHEP Beijing, Beijing
- B. Cui, X. Guan
CIAE, Beijing
- J. Fang, Z.Y. Guo
PKU/IHIP, Beijing
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Study on intense beam proton linac was started about four years ago in a national program for the basic research on ADS in China. This ADS program is meant for the future development of the clean nuclear power generation. Another important application of HPPA for Chinese Spallation Neutron Source was also proposed recently in China, and it is financially supported by Chinese Academy of Sciences. In this paper, the research progress on intense beam proton linac in these two application fields will be outlined. It involves the test result of an high-current ECR proton source, construction status of a 3.5 MeV RFQ accelerator and the design of a DTL linac.
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| THP69 |
The Tuning Study of the Coupled Cavities for the RF Chopper System of J-PARC
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770 |
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- S. Wang, S. Fu
IHEP Beijing, Beijing
- T. Kato
KEK, Ibaraki
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A 3 MeV medium-energy beam transport line (MEBT) is located between RFQ and DTL in the linac of the Japan Proton Accelerator Research Complex (J-PARC). MEBT accomplishes beam matching and chopping. An rf deflector (RFD), which is a heavily loaded cavity, was adopted as a chopper in J-PARC linac for chopping 500 μs long macropulses from the ion source into sub-pulses for injecting into the following 3 GeV rapid-cycling ring. A coupled RFD system was proposed in the design of chopper system for saving the cost of rf power source. The tuning of the coupled RFD system was successfully performed. The longer rise time of the second RFD and the delay of the second RFD excitation were found during the tuning of the coupled RFD system, and these phenomena were further analyzed and investigated. Both in the high power and beam tests, the chopper worked well without any discharge under 36 kW peak driving power.
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