A multi-length bunch design for electron storage ringswith odd buckets

HU Liang-Jing; LI Wei-Min; WANG Lin; XIANG Dao; HUANG Xiao-Biao

doi:10.1088/1674-1137/39/7/077001

Chinese Physics C> 2015, Vol. 39> Issue(7) : 077001 DOI: 10.1088/1674-1137/39/7/077001

A multi-length bunch design for electron storage ringswith odd buckets

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Abstract：
A scheme with two superconducting RF cavities is designed to upgrade electron storage rings with odd buckets to multi-length bunches. In this paper, the Hefei Light Source Ⅱ (HLS Ⅱ) is given as an example for odd buckets. As it is designed for 45 buckets, which is a multiple of 3, simultaneous generation of three different lengths of bunches is proposed with the presently applied user optics. The final result, without low-α optics, is to fill HLS Ⅱ with long bunches of length 50 ps, medium bunches of 23 ps and short bunches of 6 ps. Every third bucket can be filled with short bunches, of which the current limit is up to 6.6 mA, more than 60 times the limit for low-α mode. Moreover, particle tracking simulations to examine the beam dynamics, performed by ELEGANT, and calculations of the beam instabilities are presented in this paper.

[1]	SHI Tan , JI Fu-Hao , YE Mao , WAN Wei-Shi , QIAO Shan . Design of a multi-channel spin polarimeter. Chinese Physics C, 2015, 39(3): 039001. doi: 10.1088/1674-1137/39/3/039001
[2]	ZHANG Qing-Kun , WANG Lin , LI Wei-Min , GAO Wei-Wei . Broadband impedance calculations and single bunch instabilities estimations of of the HLS-II storage ring. Chinese Physics C, 2015, 39(12): 127004. doi: 10.1088/1674-1137/39/12/127004
[3]	TIAN Sai-Ke , JIAO Yi , WANG Jiu-Qing . Bunch length manipulation in a diffraction-limited storage ring. Chinese Physics C, 2015, 39(12): 127001. doi: 10.1088/1674-1137/39/12/127001
[4]	FAN Hao , WU Cong-Feng , HE Duo-Hui . Calculations for shortening the bunch length in storage rings using a harmonic cavity. Chinese Physics C, 2014, 38(8): 087004. doi: 10.1088/1674-1137/38/8/087004
[5]	LI Wei-Wei , HE Zhi-Gang , JIA Qi-Ka . Generation and measurement of sub-picosecond electron bunch in photocathode rf gun. Chinese Physics C, 2013, 37(12): 127002. doi: 10.1088/1674-1137/37/12/127002
[6]	XU Wei , LI Jing-Yi , HE Duo-Hui . A betatron tune measurement system based on bunch-by-bunch transverse feedback at the Duke storage ring. Chinese Physics C, 2013, 37(7): 077006. doi: 10.1088/1674-1137/37/7/077006
[7]	CHEN Si , HUANG Sen-Lin , LI Yong-Ming , FENG Li-Wen , ZHU Feng , QUAN Sheng-Wen , LIU Ke-Xin , CHEN Jia-Er . Multi-pass, multi-bunch beam breakup for 9-cellTesla cavities in the ERL. Chinese Physics C, 2013, 37(8): 087001. doi: 10.1088/1674-1137/37/8/087001
[8]	ZHANG Hao , LI Wei-Min , FENG Guang-Yao , WANG Lin , ZHANG Shan-Cai , LI Wei , LIANG Jun-Jun . The magnet design for the HLS storage ring upgrade project. Chinese Physics C, 2012, 36(1): 91-95. doi: 10.1088/1674-1137/36/1/016
[9]	DU Ying-Chao , HUA Jian-Fei , YAN Li-Xin , DU Qiang , HUANG Wen-Hui , TANG Chuan-Xiang . Bunch length measurement at Tsinghua Thomson scattering X-ray source. Chinese Physics C, 2011, 35(5): 505-508. doi: 10.1088/1674-1137/35/5/020
[10]	YANG Dan-Dan , HUANG Wen-Hui . Design for the lattice with 4-DBA structure of the compact laser-electron storage ring. Chinese Physics C, 2011, 35(8): 784-790. doi: 10.1088/1674-1137/35/8/016
[11]	SUN Da-Rui , XU Jin-Qiang , CHEN Sen-Yu . Electro-optical sampling non-synchronous delay scanning measurement ofelectron beam bunch length at BFEL. Chinese Physics C, 2010, 34(2): 227-230. doi: 10.1088/1674-1137/34/2/014
[12]	ZHANG Jing-Ru , DAI Jian-Ping , GU Qiang , PEI Guo-Xi , ZHAO Ming-Hua , ZHONG Shao-Peng , WANG Xing-Tao , CHEN Yong-Zhong , HOU Mi . Bunch length measurement using a traveling wave RF deflector. Chinese Physics C, 2010, 34(1): 138-142. doi: 10.1088/1674-1137/34/1/026
[13]	LIN Xu-Ling , ZHANG Jian-Bing , LUO Feng , BEI Hua , LU Shan-Liang , YU Tie-Min , DAI Zhi-Min . Preliminary result of bunch length measurement using a modified Michelson interferometer. Chinese Physics C, 2009, 33(10): 901-904. doi: 10.1088/1674-1137/33/10/015
[14]	SHI Jia-Ru , CHEN Huai-Bi , TANG Chuan-Xiang , HUANG Wen-Hui , DU Ying-Chao , ZHENG Shu-Xin , REN Li . RF deflecting cavity for bunch length measurement in Tsinghua Thomson scattering X-ray source. Chinese Physics C, 2009, 33(S2): 161-164. doi: 10.1088/1674-1137/33/S2/042
[15]	GAO Jie . Bunch transverse emittance increase in electron storage rings. Chinese Physics C, 2009, 33(7): 572-576. doi: 10.1088/1674-1137/33/7/013
[16]	ZHANG Lei , MA Hui-Zhou , YUE Jun-Hui , LEI Ge , CAO Jian-She , MA Li . Design of BEPCⅡ bunch current monitor system. Chinese Physics C, 2008, 32(3): 218-221. doi: 10.1088/1674-1137/32/3/012
[17]	SHI Jia-Ru , CHEN Huai-Bi , TANG Chuan-Xiang , HUANG Wen-Hui , DU Ying-Chao , ZHENG Shu-Xin , REN Li . RF deflecting cavity design for bunch length measurement of photoinjector at Tsinghua University. Chinese Physics C, 2008, 32(10): 837-841. doi: 10.1088/1674-1137/32/10/014
[18]	Rao Yinong , Xia Jiawen , Yuan Youjin , Wei Baowen . Simulation of Electron Cooling Process in a Storage Ring. Chinese Physics C, 1997, 21(S2): 73-84.
[19]	Guo Zhiyuan , Qin Qing , Zhang Chuang . A Study on Bunch Lengthening in the Beijing Electron-Positron Collider. Chinese Physics C, 1996, 20(S4): 403-410.
[20]	Li Jin , Mao Zepu . Measurement of the Bunch Length of Beijing Electron Positron Collider. Chinese Physics C, 1991, 15(S3): 219-225.

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HU Liang-Jing, LI Wei-Min, WANG Lin, XIANG Dao and HUANG Xiao-Biao. A multi-length bunch design for electron storage ringswith odd buckets[J]. Chinese Physics C, 2015, 39(7): 077001. doi: 10.1088/1674-1137/39/7/077001

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Received: 2014-09-11
Revised: 2015-02-17

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沈阳化工大学材料科学与工程学院沈阳 110142

A multi-length bunch design for electron storage ringswith odd buckets

Corresponding author: HU Liang-Jing,

Corresponding author: LI Wei-Min,

Received Date: 2014-09-11
Accepted Date: 2015-02-17
Available Online: 2015-07-05

Abstract: A scheme with two superconducting RF cavities is designed to upgrade electron storage rings with odd buckets to multi-length bunches. In this paper, the Hefei Light Source Ⅱ (HLS Ⅱ) is given as an example for odd buckets. As it is designed for 45 buckets, which is a multiple of 3, simultaneous generation of three different lengths of bunches is proposed with the presently applied user optics. The final result, without low-α optics, is to fill HLS Ⅱ with long bunches of length 50 ps, medium bunches of 23 ps and short bunches of 6 ps. Every third bucket can be filled with short bunches, of which the current limit is up to 6.6 mA, more than 60 times the limit for low-α mode. Moreover, particle tracking simulations to examine the beam dynamics, performed by ELEGANT, and calculations of the beam instabilities are presented in this paper.