Longitudinal RF capture and acceleration simulation in CSNS RCS

LIU Lin; TANG Jing-Yu; QIU Jing; WEI Tao

doi:10.1088/1674-1137/33/S2/002

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2009, Vol. 33> Issue(S2) : 4-7 DOI: 10.1088/1674-1137/33/S2/002

Longitudinal RF capture and acceleration simulation in CSNS RCS

Abstract
HTML
Reference
Related

PDF

Abstract：
China Spallation Neutron Source (CSNS) is a high power proton accelerator-based facility. Uncontrolled beam loss is a major concern in designing the CSNS to control the radioactivation level. For the Rapid Cycling Synchrotron (RCS) of the CSNS, the repetition frequency is too high for the longitudinal motion to be fully adiabatic. Significant beam loss happens during the RF capture and initial acceleration of the injection period. To reduce the longitudinal beam loss, beam chopping and momentum offset painting methods are used in the RCS injection. This paper presents detailed studies on the longitudinal motion in the RCS by using the ORBIT simulations, which include different beam chopping factors, momentum offsets and RF voltage optimization. With a trade-off between the longitudinal beam loss and transverse incoherent tune shift that will also result in beam losses, optimized longitudinal painting schemes are obtained.

[1]	Xiao-Ni Li , Wei-Qiang Wen , Heng Du , Peng Li , Xiao-Hu Zhang , Xue-Jing Hu , Guo-Feng Qu , Zhong-Shan Li , Wen-Wen Ge , Jie Li , Han-Bing Wang , Jia-Wen Xia , Jian-Cheng Yang , Xin-Wen Ma , You-Jin Yuan . Simulation of longitudinal dynamics of laser-cooled and RF-bunched C³⁺ ion beams at heavy ion storage ring CSRe. Chinese Physics C, 2017, 41(7): 077003. doi: 10.1088/1674-1137/41/7/077003
[2]	YUAN Yao-Shuo , LI Kai-Wei , WANG Na , Yoshiro Irie , WANG Sheng . Study of the beam loading effect in the CSNS/RCS. Chinese Physics C, 2015, 39(4): 047003. doi: 10.1088/1674-1137/39/4/047003
[3]	LI Xiao , SUN Hong , LONG Wei , ZHAO Fa-Cheng , ZHANG Chun-Lin . Design and performance of the LLRF system for CSNS/RCS. Chinese Physics C, 2015, 39(2): 027002. doi: 10.1088/1674-1137/39/2/027002
[4]	LIU Ren-Hong , ZHANG Jun-Song , QU Hua-Min , KANG Ling , WANG Mo-Tuo , WANG Guang-Yuan , WANG Hai-Jing . Vibration research of the AC dipole-girder system for CSNS/RCS. Chinese Physics C, 2014, 38(6): 067005. doi: 10.1088/1674-1137/38/6/067005
[5]	YIN Xue-Jun , LI A-Hong , XIAO Yong-Chuang , CHEN Qiang , LIU Hua-Chang , GONG Ke-Yun , FU Shi-Nian . Preliminary study on the RF tuning of CSNS DTL. Chinese Physics C, 2014, 38(2): 027002. doi: 10.1088/1674-1137/38/2/027002
[6]	AN Yu-Wen , WANG Sheng . Study on application of independent component analysis in the CSNS/RCS. Chinese Physics C, 2013, 37(3): 037006. doi: 10.1088/1674-1137/37/3/037006
[7]	YANG Xiao-Yu , XU Tao-Guang , FU Shi-Nian , ZENG Lei , BIAN Xiao-Juan . Classical and modern power spectrum estimation for tune measurement in CSNS RCS. Chinese Physics C, 2013, 37(11): 117003. doi: 10.1088/1674-1137/37/11/117003
[8]	ZOU Yi-Qing , WANG Na , KANG Ling , QU Hua-Min , HE Zhe-Xi , YU Jie-Bing . Thermal analysis and cooling structure design of the primary collimator in CSNS/RCS. Chinese Physics C, 2013, 37(5): 057004. doi: 10.1088/1674-1137/37/5/057004
[9]	WU Yang , TANG Jing-Yu . Post-acceleration study for neutrino super-beam at CSNS. Chinese Physics C, 2013, 37(9): 097002. doi: 10.1088/1674-1137/37/9/097002
[10]	LIU Ren-Hong , QU Hua-Min , KANG Ling , ZHANG Jun-Song , WANG Hai-Jing . Modal analysis of AC quadrupole magnet system for CSNS/RCS. Chinese Physics C, 2013, 37(8): 087002. doi: 10.1088/1674-1137/37/8/087002
[11]	YANG Xiao-Yu , XU Tao-Guang , FU Shi-Nian , LIU Yu-Dong , LI Yong , ZHAO Ya-Liang . Design of a stripline kicker for tune measurementin CSNS RCS. Chinese Physics C, 2012, 36(7): 666-669. doi: 10.1088/1674-1137/36/7/017
[12]	SUN Xian-Jing , DENG Chang-Dong , KANG Wen . Transient electromagnetic simulation and thermal analysis of the DC-biased AC quadrupole magnet for CSNS/RCS. Chinese Physics C, 2012, 36(5): 443-446. doi: 10.1088/1674-1137/36/5/011
[13]	LIU Hua-Chang , PENG Jun , YIN Xue-Jun , OUYANG Hua-Fu , FU Shi-Nian . RF power coupling for the CSNS DTL. Chinese Physics C, 2011, 35(1): 92-95. doi: 10.1088/1674-1137/35/1/019
[14]	XU Shou-Yan , WANG Sheng . Study on space charge effects of the CSNS/RCS. Chinese Physics C, 2011, 35(12): 1152-1158. doi: 10.1088/1674-1137/35/12/014
[15]	WEI Tao , WANG Sheng , QIU Jing , TANG Jing-Yu , QIN Qing . Beam-loss driven injection optimization for CSNS/RCS. Chinese Physics C, 2010, 34(2): 218-223. doi: 10.1088/1674-1137/34/2/012
[16]	CHEN Jin-Fang , TANG Jing-Yu . Studies of dual-harmonic acceleration at CSNS-Ⅱ. Chinese Physics C, 2010, 34(10): 1643-1648. doi: 10.1088/1674-1137/34/10/018
[17]	WEI Tao , WU Qing-Biao , LI Wen-Qian . Beam collimation for CSNS/RCS. Chinese Physics C, 2010, 34(4): 506-511. doi: 10.1088/1674-1137/34/4/018
[18]	SHEN Li , CHI Yun-Long , HUANG Chuan , TANG Jing-Yu . Design of Injection Painting Bumper Magnets Pulse Power Supply for CSNS/RCS. Chinese Physics C, 2008, 32(S1): 22-24.
[19]	WEI Tao , FU Shi-Nian , QIN Qing , TANG Jing-Yu . RF trapping and acceleration in CSNS/RCS. Chinese Physics C, 2008, 32(6): 437-441. doi: 10.1088/1674-1137/32/6/005
[20]	QIU Jing , TANG Jing-Yu , WANG Sheng , WEI Jie . Studies of Transverse Phase Space Painting for the CSNS RCS Injection. Chinese Physics C, 2007, 31(10): 942-946.

Access

Get Citation

LIU Lin, TANG Jing-Yu, QIU Jing and WEI Tao. Longitudinal RF capture and acceleration simulation in CSNS RCS[J]. Chinese Physics C, 2009, 33(S2): 4-7. doi: 10.1088/1674-1137/33/S2/002

LIU Lin, TANG Jing-Yu, QIU Jing and WEI Tao. Longitudinal RF capture and acceleration simulation in CSNS RCS[J]. Chinese Physics C, 2009, 33(S2): 4-7. doi: 10.1088/1674-1137/33/S2/002 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2009-01-05
Revised: 1900-01-01

Article Metric

Article Views(2712)
PDF Downloads(632)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Longitudinal RF capture and acceleration simulation in CSNS RCS

Corresponding author: LIU Lin,

Received Date: 2009-01-05
Accepted Date: 1900-01-01
Available Online: 2009-01-08

Abstract:

China Spallation Neutron Source (CSNS) is a high power proton accelerator-based facility. Uncontrolled beam loss is a major concern in designing the CSNS to control the radioactivation level. For the Rapid Cycling Synchrotron (RCS) of the CSNS, the repetition frequency is too high for the longitudinal motion to be fully adiabatic. Significant beam loss happens during the RF capture and initial acceleration of the injection period. To reduce the longitudinal beam loss, beam chopping and momentum offset painting methods are used in the RCS injection. This paper presents detailed studies on the longitudinal motion in the RCS by using the ORBIT simulations, which include different beam chopping factors, momentum offsets and RF voltage optimization. With a trade-off between the longitudinal beam loss and transverse incoherent tune shift that will also result in beam losses, optimized longitudinal painting schemes are obtained.