Design of a 10 MeV normal conducting CW proton linacbased on equidistant multi-gap CH cavities

LI Zhi-Hui

doi:10.1088/1674-1137/39/9/097001

Chinese Physics C> 2015, Vol. 39> Issue(9) : 097001 DOI: 10.1088/1674-1137/39/9/097001

Design of a 10 MeV normal conducting CW proton linacbased on equidistant multi-gap CH cavities

LI Zhi-Hui ^,

The Key Labratory of Radiation Physics and Technology of Ministy of Eduction, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, China

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Continuous wave (CW) high current proton linacs have wide applications as the front end of high power proton machines. The low energy part of such a linac is the most difficult and there is currently no widely accepted solution. Based on the analysis of the focusing properties of the CW low energy proton linac, a 10 MeV low energy normal conducting proton linac based on equidistant seven-gap Cross-bar H-type (CH) cavities is proposed. The linac is composed of ten 7-gap CH cavities and the transverse focusing is maintained by quadrupole doublets located between the cavities. The total length of the linac is less than 6 meters and the average acceleration gradient is about 1.2 MeV/m. The electromagnetic properties of the cavities are investigated by Microwave Studio. At the nominal acceleration gradient the maximum surface electric field in the cavities is less than 1.3 times the Kilpatrick limit, and the Ohmic loss of each cavity is less than 35 kW. Multi-particle beam dynamics simulations are performed with Tracewin code, and the results show that the beam dynamics of the linac are quite stable, the linac has the capability to accelerate up to 30 mA beam with acceptable dynamics behavior.

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LI Zhi-Hui. Design of a 10 MeV normal conducting CW proton linacbased on equidistant multi-gap CH cavities[J]. Chinese Physics C, 2015, 39(9): 097001. doi: 10.1088/1674-1137/39/9/097001

LI Zhi-Hui. Design of a 10 MeV normal conducting CW proton linacbased on equidistant multi-gap CH cavities[J]. Chinese Physics C, 2015, 39(9): 097001. doi: 10.1088/1674-1137/39/9/097001 shu

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Received: 2014-12-01
Revised: 1900-01-01

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Design of a 10 MeV normal conducting CW proton linacbased on equidistant multi-gap CH cavities

LI Zhi-Hui ^,

Corresponding author: LI Zhi-Hui,

The Key Labratory of Radiation Physics and Technology of Ministy of Eduction, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, China

Received Date: 2014-12-01
Accepted Date: 1900-01-01
Available Online: 2015-09-05

Abstract: Continuous wave (CW) high current proton linacs have wide applications as the front end of high power proton machines. The low energy part of such a linac is the most difficult and there is currently no widely accepted solution. Based on the analysis of the focusing properties of the CW low energy proton linac, a 10 MeV low energy normal conducting proton linac based on equidistant seven-gap Cross-bar H-type (CH) cavities is proposed. The linac is composed of ten 7-gap CH cavities and the transverse focusing is maintained by quadrupole doublets located between the cavities. The total length of the linac is less than 6 meters and the average acceleration gradient is about 1.2 MeV/m. The electromagnetic properties of the cavities are investigated by Microwave Studio. At the nominal acceleration gradient the maximum surface electric field in the cavities is less than 1.3 times the Kilpatrick limit, and the Ohmic loss of each cavity is less than 35 kW. Multi-particle beam dynamics simulations are performed with Tracewin code, and the results show that the beam dynamics of the linac are quite stable, the linac has the capability to accelerate up to 30 mA beam with acceptable dynamics behavior.