Chinese Physics C > 2012, Vol. 36 > Issue(10): 1004-1008 DOI: 10.1088/1674-1137/36/10/016

RF knock-out extraction in HITFiL

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Abstract：
A compact facility for cancer therapy has been designed and is presently under construction. A slow beam extraction system using the RF-Knock Out method and 3rd-order resonance is adopted in the synchrotron of this facility. Eight sextupoles are used, four of them are for correcting the chromaticity and the rest for driving the 3rd-order resonance. In order to save the aperture of vacuum chamber, a 3-magnet bump is adopted during the extraction process. The extraction phase space map and the last 3 turns' particle trajectory before extraction are given. The matching betatron functions with HEBT (high energy beam transport) are also presented.

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SHI Jian, YANG Jian-Cheng, XIA Jia-Wen, YUAN You-Jin, LI Jie, CHAI Wei-Ping, SONG Ming-Tao and ZHANG Xiao-Hu. RF knock-out extraction in HITFiL[J]. Chinese Physics C, 2012, 36(10): 1004-1008. doi: 10.1088/1674-1137/36/10/016

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Received: 2011-12-23
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

RF knock-out extraction in HITFiL

Corresponding author:YANG Jian-Cheng,

Received Date:2011-12-23
Accepted Date:1900-01-01
Available Online:2012-10-05

Abstract:A compact facility for cancer therapy has been designed and is presently under construction. A slow beam extraction system using the RF-Knock Out method and 3rd-order resonance is adopted in the synchrotron of this facility. Eight sextupoles are used, four of them are for correcting the chromaticity and the rest for driving the 3rd-order resonance. In order to save the aperture of vacuum chamber, a 3-magnet bump is adopted during the extraction process. The extraction phase space map and the last 3 turns' particle trajectory before extraction are given. The matching betatron functions with HEBT (high energy beam transport) are also presented.