Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

YANG Guo-Jun; ZHANG Zhuo; CHEN Si-Fu; LIU Cheng-Jun; LIN Yu-Zheng

Chinese Physics C> 2005, Vol. 29> Issue(2) : 191-196

Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

Department of Engineering Physics,Tsinghua University,Beijing 100084,China2 Institute of Fluid Physics,CAEP,Mianyang 621900,China

Abstract
HTML
Reference
Related

PDF

Abstract：
The three gradient method is a conventional means for beam emittance measurement. In intense electron beam accelerators,since the space charge effect is remarkable, the conventional three gradient method in not available.A MTGM(abbreviation for the Modified Three Gradient Method)is an improvement of the conventional three gradient method, the space charge effect is included in this method. In this paper, the basic theory of MTGM is stated, the principle of applying the MTGM method to beam diagnostics is described. Experiments are carried out on two electron beams of 3.5MeV, 2.6kA, 100ns and 18MeV,2.6kA 100ns separately, which scheme is presented. Results of these experiments are presented together with the error analysis. The results show that the MTGM method is an effective way of emittance measurement for intense pulse electron beam.

References

[1]

. HUI Z X, YANG Z H. Free Electron Laser. National Defence Industry Press , 1995. 12. (in Chinese)(惠钟锡,杨震华. 自由电子激光. 国防工业出版社,1995. 12)2.　WANG S H , YE Q , CAO J S et al . HEP NP , 2002 , 26 : 1184 —1188 (in Chinese)(王书鸿,叶强,曹建社等. 高能物理与核物理,2002 ,26 :1184 —1188)3.　Bardy J , Bonnafond C et al . Status of AIRIX Alignment and High Current Electron Beam Diagnostics. Proceeding of EPAC964.　Richard B R , Ekdahl C et al . Beam Emittance Diagnostic for theDARHT Second Axis Injector. Proceeding of Pulsed Power Conference ,20015.　Marghitu S , Oproiu C et al . Pulsed Electron Source Characterization with the Modified Three Gradient Method. Proceeding of International Conference on Accelerator and Large Experimental Physics Control Systems , 20016.　DAI Z Y. Research of the Increase Mechanism and Decrease Means for Beam Emittance of the Linear Induction Accelerator. Doctor Dissertation. Beijing : China Academy of Science , 2004 (in Chinese)(代志勇. 直线感应加速器束流发射度增长与抑制研究. 中国科学院研究生院博士学位论文,2004)7.　GUAN Z, CHEN J L. Numerical Computational Methods. Tsinghua University Press , 1990. 8 (in Chinese)(关治,陈景良. 数值计算方法. 清华大学出版社,1990. 8)

[1]	LIU Wei-Bin , WANG Shu-Hong , YE Qiang , WANG Lin . Emittance Measurement at BEPCⅡ Linac. Chinese Physics C, 2008, 32(S1): 86-88.
[2]	GUO Zhi-Yu , XU Rong , MING Jian-Chuan , ZOU Yu-Bin , GAO Shu-Li , ZHAO Jie , PENG Shi-Xiang , WU Wen-Zhog , QIAN Feng , SONG Zhi-Zhong , YU Jin-Xiang , YUAN Zhong-Xi , YU Mao-Lin . Measurement Techniques of High-Current Ion Beam Emittance. Chinese Physics C, 2008, 32(S1): 148-150.
[3]	XIA Lian-Sheng , LI Jin , ZHANG Huang , XIE Yu-Tong , JIANG Xiao-Guo , DAI Zhi-Yong , ZHANG Kai-Zhi , SHI Jin-Shui , DENG Jian-Jun , ZHANG Lin-Wen . Experimental Research on Double Pulsed Relativistic Electron Beams Emission from Velvet. Chinese Physics C, 2007, 31(7): 674-677.
[4]	ZHENG Jian-Hua , LIU Wei , WANG Yi-Fang , WANG Yan-Mou , MA Wei-Nian , YIN Yan , SONG Hai-Hong . High Sensitivity Beam Phase Measurement System for Isochronous Cyclotron. Chinese Physics C, 2007, 31(3): 303-306.
[5]	M.P.Stockli . Measuring and Analyzing Transverse Low-Energy Ion Beam Emittances. Chinese Physics C, 2007, 31(S1): 182-186.
[6]	MA Yan-Yun , PEI Shi-Lun , CAO Xing-Zhong , WANG Ping , WEI Cun-Feng , MA Chuang-Xing , ZHANG Zhi-Ming , WANG Shu-Hong , WANG Bao-Yi , WEI Long . Design of a Pulsed Low Energy Positron System Based on Beijing Intense Slow Positron Beam. Chinese Physics C, 2006, 30(2): 166-170.
[7]	SUN Bao-Gen , ZHENG Pu , LU Ping , XU Hong-Liang , WANG Jun-Hua , WANG Ji-Gang , WANG Bao-Yun . Development of New Beam Profile and Emittance Measurement System for HLS. Chinese Physics C, 2006, 30(8): 792-796.
[8]	LI Zheng-Hong . Invetisgation of Thermal Emittance Measurement in RF Photoinjector. Chinese Physics C, 2005, 29(6): 615-618.
[9]	AN Shao-Hui , WU Chong , LI Xin , CHEN Hong-Fang , HENG Yue-Kun , SUN Zhi-Jia , WANG Yi-Fang , LI Cheng . Beam Test of the Time Resolution of the BESⅢ Endcap TOF. Chinese Physics C, 2005, 29(8): 775-780.
[10]	JIANG Xiao-Guo , YANG Guo-Jun , ZHANG Kai-Zhi , SHI Jin-Shui , DENG Jian-Jun , WANG Yuan , LI Cheng-Gang . Time-Resolved Measurement System Using Optical Transition Radiation for Electron Beam of High Energy and High Current. Chinese Physics C, 2005, 29(11): 1095-1099.
[11]	SUN Liang-Ting , CAO Yun , FENG Yu-Cheng , LI Jin-Yu , ZHAO Hong-Wei , ZHANG Zi-Min , WANG Hui , MA Bao-Hua , HE Wei , ZHAO HUAN-Yu , GUO Xiao-Hong . Experimental Study on Ion Beam Emittance of ECR Ion Source. Chinese Physics C, 2005, 29(12): 1179-1184.
[12]	HUANG Xiao-Long , YU Wei-Xiang , LU Han-Lin , ZHOU Chun-Mei , WU Zhen-Dong , HUO Jun-De . Calculation the Absolute γ-Ray Intensities and Their Uncertainties. Chinese Physics C, 2004, 28(6): 588-593.
[13]	LONG Ji-Dong , LIN Yu-Zheng , LUO Fei , GU Zhuo-Wei , SHI Jin-Shui . Destruction Study of Tantalum Target Impacted by 12MeV Electron Beam. Chinese Physics C, 2004, 28(5): 564-568.
[14]	CAO Yun , MA Lei , ZHAO Hong-Wei , ZHANG Zi-Min , SUN Liang-Ting , LI Jing-Yu , FENG Yu-Cheng , LI Xi-Xia . Emittance Measurement of Highly Charged Ion Beams Extracted from ECR Ion Source Using Electric Sweep Scanner. Chinese Physics C, 2004, 28(8): 885-888.
[15]	XING Qing-Zi , FU Shi-Nian , LIN Yu-Zheng , FANG Shou-Xian . Calculation of Beam Acceptance for RFQ Accelerators. Chinese Physics C, 2003, 27(7): 628-632.
[16]	GU An-Jia , DING Yuan-Tao , ZHAO Kui , ZHANG Bao-Cheng , QUAN Sheng-Wen , LU Xiang-Yang , CHEN Jia-Er . A New Measurement of Electron Beam Emittance with Cerenkov Radiation “Double Imaging” Method. Chinese Physics C, 2003, 27(2): 163-168.
[17]	WANG Shu-Hong , YE Qiang , CAO Jian-She , MA Li , LIU Yu-Cheng , LE Qi , PEI Guo-Xi , ZHANG Jia-Fei . Emittance Measurement by Multi-Changing Focusing Strength. Chinese Physics C, 2002, 26(11): 1184-1188.
[18]	HE Wei-Ning . SYNTACTIC ANALYSIS OF DEFORMED EMITTANCE SHAPE MEASUREMENTS. Chinese Physics C, 1990, 14(5): 393-398.
[19]	XU Jian-Ming , LIU Shi-Yao . A PROPOSAL FOR THE MEASUREMENT OF THE REAL EMITTANCE OF THE BEAM IN CYCLIC ACCELERATORS. Chinese Physics C, 1983, 7(2): 178-185.
[20]	WEI Kai-Yu . INCREASE OF BEAM PROJECTIVE EMITTANCE IN SYSTEM WITH DISPERSION. Chinese Physics C, 1983, 7(5): 589-597.

Access

Get Citation

YANG Guo-Jun, ZHANG Zhuo, CHEN Si-Fu, LIU Cheng-Jun and LIN Yu-Zheng. Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method[J]. Chinese Physics C, 2005, 29(2): 191-196.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2004-06-16
Revised: 2004-07-26

Article Metric

Article Views(2801)
PDF Downloads(611)
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

Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

Corresponding author: YANG Guo-Jun,

Department of Engineering Physics,Tsinghua University,Beijing 100084,China2 Institute of Fluid Physics,CAEP,Mianyang 621900,China

Received Date: 2004-06-16

Accepted Date: 2004-07-26

Available Online: 2005-02-05

Abstract: The three gradient method is a conventional means for beam emittance measurement. In intense electron beam accelerators,since the space charge effect is remarkable, the conventional three gradient method in not available.A MTGM(abbreviation for the Modified Three Gradient Method)is an improvement of the conventional three gradient method, the space charge effect is included in this method. In this paper, the basic theory of MTGM is stated, the principle of applying the MTGM method to beam diagnostics is described. Experiments are carried out on two electron beams of 3.5MeV, 2.6kA, 100ns and 18MeV,2.6kA 100ns separately, which scheme is presented. Results of these experiments are presented together with the error analysis. The results show that the MTGM method is an effective way of emittance measurement for intense pulse electron beam.

HTML

Reference (1)

Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article