Simulation study on the emittance compensation of off-axis emitted beam in RF photoinjector

Rui-Xuan Huang; Chad Mitchell; Qi-Ka Jia; Christos Papadopoulos; Fernando Sannibale

doi:10.1088/1674-1137/40/11/117004

Chinese Physics C> 2016, Vol. 40> Issue(11) : 117004 DOI: 10.1088/1674-1137/40/11/117004

Simulation study on the emittance compensation of off-axis emitted beam in RF photoinjector

1.
NSRL, University of Science and Technology of China, Hefei 230029, China
2.
ATAP, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California, 94720, USA
3.
ATAP, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California, 94720, USA
4.
NSRL, University of Science and Technology of China, Hefei 230029, China

Abstract
HTML
Reference
Related

PDF

Abstract：
To make full use of the photocathode material and improve its quantum efficiency lifetime, it can be necessary to operate the laser away from the cathode center in photoinjectors. In RF guns, the off-axis emitted beam will see a time-dependent RF effect, which would generate a significant growth in transverse emittance. It has been demonstrated that such an emittance growth can be almost completely compensated by orienting the beam on a proper orbit in the downstream RF cavities along the injector [1]. In this paper we analyze in detail the simulation techniques used in reference [1] and the issues associated with them. The optimization of photoinjector systems involving off-axis beams is a challenging problem. To solve this problem, one needs advanced simulation tools including both genetic algorithms and an efficient algorithm for 3D space charge. In this paper, we report on simulation studies where the two codes ASTRA and IMPACT-T are used jointly to overcome these challenges, in order to optimize a system designed to compensate for the emittance growth in a beam emitted off axis.
- photoinjector ,
- off-axis emission ,
- genetic algorithm ,
- ASTRA ,
- IMPACT-T ,
- RF effect ,
- emittance compensation

References

[1]	R. Huang et al, Off-axis Beam Dynamics in RF-Gun-based Electron Photoinjectors, Submitted to Phys. Rev. Accel. and Beams
[2]	B. McNeil and N. Thompson, Nature photonics, 4: 814(2010)
[3]	Q. K. Jia, Chinese physics C, 39(4): 48101(2015)
[4]	Haixiao Deng et al, Physical Review Letters, 113: 254802(2014)
[5]	M. Boscolo et al, Nucl. Instrum. Methods A, 577: 409(2007)
[6]	W. W. Li, Z. G. He, and Q. K. Jia, Chinese Physics C, 38(4): 47003(2014)
[7]	Wen-Xin Liu et al, Chinese physics B, 20(7): 074102(2011)
[8]	P. Musumeci et al, Applied Physics Letters, 97: 063502(2010)
[9]	J. Edgecumbe et al, Proc. SPIE (1992), 1655: 204
[10]	D. Dowell et al, Nucl. Instrum. Methods A, 622: 685(2010)
[11]	B. Dunham et al, Applied Physics Letters, 102: 034105(2013)
[12]	D. Schlierkamp, Proc. of 5th ICGA Conf (1993), p. 648
[13]	K. Deb et al, Evolutionary Computation, 6:182(2002)
[14]	F. Sannibale et al, NAPAC, WEYA1(2013)
[15]	K. Baptiste et al, Nucl. Instrum. Methods A, 599: 1(2009)
[16]	J. Schmerge et al, Proc. 36th FEL Conf, THP042 (2014)
[17]	P. Loschialpo et al, Journal of Applied Physics, 57: 10(1985)
[18]	H. Qian et al, Proc. 5th IPAC Conf, THPRI066 (2014)
[19]	B. Aune et al, Phys. Rev. ST Accel. Beams, 3: 092001(2000)
[20]	C. Papadopoulos, D. Filippetto, R. Huang et al, Proc. 36th FEL Conf, THP057 (2014)
[21]	J. H. Li, J. Y. Tang, H. F. Ouyang, Chinese Physics C, 33(10): 905(2009)
[22]	J. Qiang et al, Phys. Rev. ST Accel. Beams, 9: 044204(2006)
[23]	H. Enge, Review of Scientific Instruments, 35: 278(1964)
[24]	B. Muratori, J. Jones, and A. Wolski, Phys. Rev. ST Accel. Beams, 18: 064001(2015)

[1]	Ayushi Awasthi , Arushi Sharma , Ishwar Kant , O. S. K. S. Sastri . High-precision inverse potentials for neutron-proton scattering using piece-wise smooth Morse functions. Chinese Physics C, 2024, 48(10): 104104. doi: 10.1088/1674-1137/ad5d63
[2]	Wei Li , Hao Hao , Stepan F. Mikhailov , Victor Popov , Wei-Min Li , Ying. K. Wu . Compensation for booster leakage field in the Duke storage ring. Chinese Physics C, 2017, 41(1): 017002. doi: 10.1088/1674-1137/41/1/017002
[3]	Jian Tian , Wei Ye . Effect of pre-equilibrium emission on probing postsaddle nuclear dissipation with neutrons. Chinese Physics C, 2016, 40(9): 094103. doi: 10.1088/1674-1137/40/9/094103
[4]	Yi Jiao . Improving nonlinear performance of the HEPS baseline design with a genetic algorithm. Chinese Physics C, 2016, 40(7): 077002. doi: 10.1088/1674-1137/40/7/077002
[5]	Zhi-Wen Wang , Sen-Lin Huang , Lin Lin , Gang Zhao , Sheng-Wen Quan , Ke-Xin Liu , Jia-Er Chen . Drive laser system for the DC-SRF photoinjector at Peking University. Chinese Physics C, 2016, 40(1): 017004. doi: 10.1088/1674-1137/40/1/017004
[6]	XU Gang , PENG Yue-Mei . Minimum emittance in TBA and MBA lattices. Chinese Physics C, 2015, 39(3): 037005. doi: 10.1088/1674-1137/39/3/037005
[7]	WANG Jie , LU Xiao-Long , YAN Yan , WEI Zheng , WANG Jun-Run , RAN Jian-Ling , HUANG Zhi-Wu , LAN Chang-Lin , YAO Ze-En , SHEN Fei , LIANG Tian-Jiao . Study of an unfolding algorithm for D-T neutron energy spectra measurement using a recoil proton method. Chinese Physics C, 2015, 39(7): 076201. doi: 10.1088/1674-1137/39/7/076201
[8]	JIAO Yi . Evolutionary genetic optimization of the injector beamdynamics for the ERL test facility at IHEP. Chinese Physics C, 2014, 38(8): 088102. doi: 10.1088/1674-1137/38/8/088102
[9]	CHEN Jia , WANG Lin , LI Wei-Min , GAO Wei-Wei . Optimization of magnet sorting in a storage ring using genetic algorithms. Chinese Physics C, 2013, 37(12): 127004. doi: 10.1088/1674-1137/37/12/127004
[10]	HU Tong-Ning , PEI Yuan-Ji , QIN Bin , CHEN Qu-Shan . Beam tail effect of a performance-enhanced EC-ITC RF gun. Chinese Physics C, 2013, 37(12): 128101. doi: 10.1088/1674-1137/37/12/128101
[11]	QUE Jie-Min , CAO Da-Quan , ZHAO Wei , TANG Xiao , SUN Cui-Li , WANG Yan-Fang , WEI Cun-Feng , SHI Rong-Jian , WEI Long , YU Zhong-Qiang , YAN Yong-Lian . Computed laminography and reconstruction algorithm. Chinese Physics C, 2012, 36(8): 777-783. doi: 10.1088/1674-1137/36/8/017
[12]	HE Zhi-Gang , WANG Xiao-Hui , JIA Qi-Ka . Photoinjector beam quality improvement by shaping the wavefront of a drive laserwith oblique incidence. Chinese Physics C, 2012, 36(6): 561-565 . doi: 10.1088/1674-1137/36/6/014
[13]	Lü Hui-Yi , WANG Tie-Shan , HAN Yun-Cheng , FANG Kai-Hong , MENG Xuan , HE Qing-Hua , GUAN Xing-Cai , LAN Ming-Cong . Effect of deuteron density distribution on the deduction of screening potential from the D(d,p)T reaction in Be metals. Chinese Physics C, 2011, 35(1): 26-30. doi: 10.1088/1674-1137/35/1/006
[14]	GAO Wei-Wei , WANG Lin , LI Wei-Min , HE Duo-Hui . Low emittance lattice optimization using a multi-objective evolutionary algorithm. Chinese Physics C, 2011, 35(9): 859-864. doi: 10.1088/1674-1137/35/9/014
[15]	LIU Sheng-Guang , Masafumi Fukuda , Sakae Araki , Nobuhiro Terunuma , Junji Urakawa . Emittance measurement & optimization for the photocathode RF gun with laser profile shaping. Chinese Physics C, 2010, 34(5): 584-588. doi: 10.1088/1674-1137/34/5/014
[16]	WANG Ji-Ke , MAO Ze-Pu , BIAN Jian-Ming , CAO Guo-Fu . BESⅢ track fitting algorithm. Chinese Physics C, 2009, 33(10): 870-879. doi: 10.1088/1674-1137/33/10/010
[17]	TANG Chuan-Xiang , LIU Xiao-Han . Ultra-low emittance X-band photocathode RF gun. Chinese Physics C, 2009, 33(S2): 102-104. doi: 10.1088/1674-1137/33/S2/026
[18]	ZHANG Fang , ZUO Wei , CHEN Ji-Yan , ZHOU Zhen-Xiao . Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions. Chinese Physics C, 2008, 32(7): 561-564. doi: 10.1088/1674-1137/32/7/010
[19]	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
[20]	LI Zheng-Hong . Invetisgation of Thermal Emittance Measurement in RF Photoinjector. Chinese Physics C, 2005, 29(6): 615-618.

Access

Get Citation

Rui-Xuan Huang, Chad Mitchell, Qi-Ka Jia, Christos Papadopoulos and Fernando Sannibale. Simulation study on the emittance compensation of off-axis emitted beam in RF photoinjector[J]. Chinese Physics C, 2016, 40(11): 117004. doi: 10.1088/1674-1137/40/11/117004

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2016-04-05
Revised: 2016-05-10

Fund

Supported by National Nature Science Foundation of China (11375199), and Chinese Scholarship Council

Article Metric

Article Views(1587)
PDF Downloads(93)
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

Simulation study on the emittance compensation of off-axis emitted beam in RF photoinjector

Corresponding author: Rui-Xuan Huang,

Corresponding author: Qi-Ka Jia,

1. NSRL, University of Science and Technology of China, Hefei 230029, China

2. ATAP, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California, 94720, USA

3. ATAP, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California, 94720, USA

4. NSRL, University of Science and Technology of China, Hefei 230029, China

Received Date: 2016-04-05

Accepted Date: 2016-05-10

Available Online: 2016-11-05

Fund Project: Supported by National Nature Science Foundation of China (11375199), and Chinese Scholarship Council

Abstract: To make full use of the photocathode material and improve its quantum efficiency lifetime, it can be necessary to operate the laser away from the cathode center in photoinjectors. In RF guns, the off-axis emitted beam will see a time-dependent RF effect, which would generate a significant growth in transverse emittance. It has been demonstrated that such an emittance growth can be almost completely compensated by orienting the beam on a proper orbit in the downstream RF cavities along the injector [1]. In this paper we analyze in detail the simulation techniques used in reference [1] and the issues associated with them. The optimization of photoinjector systems involving off-axis beams is a challenging problem. To solve this problem, one needs advanced simulation tools including both genetic algorithms and an efficient algorithm for 3D space charge. In this paper, we report on simulation studies where the two codes ASTRA and IMPACT-T are used jointly to overcome these challenges, in order to optimize a system designed to compensate for the emittance growth in a beam emitted off axis.

HTML

Reference (24)

Simulation study on the emittance compensation of off-axis emitted beam in RF photoinjector

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article