Design of a 4 MeV/u IH-DTL Injector for Cancer Therapy

DU Heng; YUAN Youjin; YIN Xuejun; WANG Kedong; LI Zhongshan; LI Xiaoni; WANG Zhijun; QU Guofeng; XU Xiaowei; LU Yuanrong; YANG Jiancheng; XIA Jiawen

doi:10.11804/NuclPhysRev.35.01.034

An interdigital H-mode drift tube linac (IH-DTL) with KONUS beam dynamic has been designed, which operation frequency was chosen 162.5 MHz. This IH-DTL consists of 41 accelerating cells and two quadrupole magnets triplets, can provide the C⁴⁺ with the current of 400 eμA and energy of 4 MeV/u for the synchrotron. In the beam dynamic design, the synchronous particle energy, inject RF phase and the acceleration voltage of each gap are optimized carefully to make the transverse normalized RMS acceptance of the IH-DTL to be 0.24 πmm·mrad and the beam emittance growth small than 10%. Then the RF structure was designed and the 3D electromagnetic field was imported into the PIC particle tracking code for the beam dynamic simulation. The transverse beam emittance at the exit of the IH-DTL is small than 13πmm·mrad which meets the injection requirement of the synchrotron. What is more, under the 7% vertical dipole fields component, the offset between the beam center and the drift tube's axis is ±0.5 mm at most. The transmission efficiency of the IH-DTL is higher than 99% for the whole beam in the acceptance.

Design of a 4 MeV/u IH-DTL Injector for Cancer Therapy

1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

2. University of Chinese Academy of Sciences, Beijing 100049, China;

3. Huizhou Research Center of Ion Sciences, Huizhou 516003, Guangdong, China;

4. Institute of Heavy Ion Physics, Peking University, Beijing 100871, China

Funds: National Natural Science Foundation of China (11375243, 11405237); Guangdong Innovative and Entrepreneurial Research Team Program (2016ZT06G373)

Received Date: 2017-07-19

Rev Recd Date: 2017-09-20

Publish Date: 2018-03-20

Key words:

Abstract: An interdigital H-mode drift tube linac (IH-DTL) with KONUS beam dynamic has been designed, which operation frequency was chosen 162.5 MHz. This IH-DTL consists of 41 accelerating cells and two quadrupole magnets triplets, can provide the C⁴⁺ with the current of 400 eμA and energy of 4 MeV/u for the synchrotron. In the beam dynamic design, the synchronous particle energy, inject RF phase and the acceleration voltage of each gap are optimized carefully to make the transverse normalized RMS acceptance of the IH-DTL to be 0.24 πmm·mrad and the beam emittance growth small than 10%. Then the RF structure was designed and the 3D electromagnetic field was imported into the PIC particle tracking code for the beam dynamic simulation. The transverse beam emittance at the exit of the IH-DTL is small than 13πmm·mrad which meets the injection requirement of the synchrotron. What is more, under the 7% vertical dipole fields component, the offset between the beam center and the drift tube's axis is ±0.5 mm at most. The transmission efficiency of the IH-DTL is higher than 99% for the whole beam in the acceptance.

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Reference (16)

[1]	XIAO Guoqing, ZHANG Hong, LI Qiang, et al. Nuclear Physics Review, 2007, 24(2):85. (in Chinese) (肖国青, 张红, 李强, 等. 原子核物理评论, 2007, 24(2):85.)
[2]	XIAO Guoqing, ZHANG Hong, LI Qiang. Chinese Physics C (HEP & NP), 2008, 32(2):8.
[3]	MO D, LIU J D, DUAN J L, et al. Nucl Instr Meth A, 2014, 333:58.
[4]	YANG Jiancheng, SHI Jian, CHAI Weiping, et al. Nucl Instr Meth A, 2014, 756:19.
[5]	WANG Bing, HAO Huanfeng, VOROZHTSOV S B, et al. Physics of Particles and Nuclei Letters, 2012, 9(3):288.
[6]	IWATA Y, YAMADA S, MURAKAMI T, et al. Nucl Instr Meth A, 2007, 572(3):1007.
[7]	SCHLITT B, CLEMENTE G, KLEFFNER C M, et al. Linac Commissioning at The Italian Hadromtherapy Center CNAO[C]. Proceedings of IPAC'10, Kyoto, Japan, MOPEA003.
[8]	RATZINGER U. Proceedings of the 1991 Particle Accelerator Conference, San Francisco, CA, New York, 1991:567.
[9]	WANGLER T P, Principles of RF linear Accelerators[M].2ed. New York:John Wiley & Sons Inc, 1998:197.
[10]	RATZINGER U. Nucl Instr Meth A, 2001, 464:636.
[11]	SCHLITT B. Commissioning and Operation of The Injector Linacs for Hit and Cnao[C]. Proceedings of LINAC08, Victoria, BC, Canada, 2008:720.
[12]	TIEDE R, CLEMENTE G, PODLECH H, et al. LORASR code Development[C]. Proceedings of the 2006 EPAC, Edinburgh, Great Britain, 2006:2194.
[13]	BATYGIN Y K. Nucl Instr Meth A, 2005, 539:455.
[14]	http://www.cobham.com/about-cobham/aerospace-andsecurity/about-us/antenna-systems/kidlington/products/opera-3d.aspx. Opera-3d electromagnetic design in three dimensions, 2011
[15]	Computer Simulation Technology (CST), Micro Wave Studio https://www.cst.com/.
[16]	BROERE J, KUGLER H, VRETENAR M, et al. High Power Conditioning of the 202 MHZ ih Tank 2 at the CERN LINAC3[C]. Proceedings of XIX International Linear Accelerator Conference, Chicago, Illinois, USA, 1998:771.

Design of a 4 MeV/u IH-DTL Injector for Cancer Therapy

doi: 10.11804/NuclPhysRev.35.01.034

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