A positron source using an axially oriented crystal associated to a granular amorphous converter

XU Cheng-Hai; Robert Chehab; Peter Sievers; Xavier Artru; Michel Chevallier; Olivier Dadoun; PEI Guo-Xi; Vladimir M; Alessandro Variola

doi:10.1088/1674-1137/36/9/014

Chinese Physics C> 2012, Vol. 36> Issue(9) : 871-878 DOI: 10.1088/1674-1137/36/9/014

A positron source using an axially oriented crystal associated to a granular amorphous converter

Abstract
HTML
Reference
Related

PDF

Abstract：
A non-conventional positron source using the intense γ radiation from an axially oriented monocrystal which materializes into e⁺e^- pairs in a granular amorphous converter is described. The enhancement of photon radiation by multi-GeV electrons crossing a tungsten crystal along its <111> axis is reported. The resulting enhancement of pair production in an amorphous converter placed 2 meters downstream, is also reported. Sweeping off the charged particles from the crystal by a bending magnet upstream of the converter allows a significant reduction of the deposited energy density. Substituting a granular target made of small spheres for the usual compact one, makes the energy dissipation easier. The deposited energy and corresponding heating are analyzed and solutions for cooling are proposed. The configurations studied here for this kind of positron source allow its consideration for unpolarized positrons for the ILC.

References

[1]

Baier V N, Katkov V M, Strakhovenko V M. Phys. Stat. Sol. (b), 1986, 133: 583-592[2] Artru X, Baier V N, Chehab R et al. Nucl. Instrum. Methods A, 1994, 344: 443-454[3] Artru X et al. Nucl. Instrum. Methods B, 1996, 119: 246-252[4] Artru X, Chehab R, Chevallier M et al. Phys. Rev. ST Accel. Beams, 2003, 6: 091003[5] Chehab R et al. Phys. Lett. B, 2002, 525: 41-48[6] Artru X et al. Nucl. Instrum. Methods B, 2003, 201: 243-252[7] Artru X et al. Nucl. Instrum. Methods B, 2005, 240: 762-776[8] Suwada T et al. Phys. Rev. E, 2003, 67: 016502[9] Suwada T et al. Phys. Rev. ST Accel. Beams, 2007, 10: 073501[10] Artru X, Chehab R, Chevallier M et al. Nucl. Instrum. Methods B, 2008, 266: 3868-3875[11] Artru X et al. Il Nuovo Cimento C, 2011, 34(4): 141-148[12] Sievers P, Pugnat P. J. Phys. G: Nucl. Part. Phys., 2003, 29: 1797-1800[13] Chehab R et al. Proceeding of PAC89. Chicago 1989. 283-285[14] Baier V N, Katkov V M, Strakhovenko V M. Nucl. Instrum. Methods B, 1995, 103: 147-155[15] Omori T. The 300 Hz Generation Option of ILC Positron Source. Proceedings of POSIPOL 2009 Workshop. Lyon, 2009[16] Chehab R et al. Radiation Damage Study of a Monocrystalline Tungsten Converter. Proceedings of EPAC'98. Stockholm, 1998[17] Sievers P et al. Positron Source Using Channeling with a granular Converter. Proceedings of POSIPOL 2011 Workshop. Beijing, 2011

[1]	Jian Liu , Jinjuan Zhang , Chang Xu , Zhongzhou Ren . Nuclear longitudinal form factors for axially deformed charge distributions expanded by nonorthogonal basis functions. Chinese Physics C, 2017, 41(5): 054101. doi: 10.1088/1674-1137/41/5/054101
[2]	Jing Yang , Wei-Ning Zhang , Yan-Yu Ren . Pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss interferometry in a viscous granular source model. Chinese Physics C, 2017, 41(8): 084102. doi: 10.1088/1674-1137/41/8/084102
[3]	XIAO Ou-Zheng . Design and simulation of a C-band SLED with mode converter. Chinese Physics C, 2014, 38(11): 117009. doi: 10.1088/1674-1137/38/11/117009
[4]	LONG Ji-Dong , YANG Zhen , DONG Pan , SHI Jin-Shui . Conceptual design of an intense positron source based on an LIA. Chinese Physics C, 2012, 36(4): 367-370. doi: 10.1088/1674-1137/36/4/013
[5]	LI Dao-Wu , LIU Jun-Hui , ZHANG Zhi-Ming , WANG Bao-Yi , ZHANG Tian-Bao , WEI Long . A compact positron annihilation lifetime spectrometer. Chinese Physics C, 2011, 35(1): 100-103. doi: 10.1088/1674-1137/35/1/021
[6]	MA Yan-Liang , OUYANG Xiao-Ping , ZHANG Jing-Wen , ZHANG Zhong-Bing , PAN Hong-Bo , CHEN Liang , LIU Lin-Yue . Properties study of ZnO:Ga crystal on pulsed radiation detections. Chinese Physics C, 2010, 34(3): 354-358. doi: 10.1088/1674-1137/34/3/009
[7]	JIN Hua , SUN Zhen-Wu , ZHENG Ren-Rong . Influence of angular momentum in axially symmetric potentials with octupole deformation. Chinese Physics C, 2009, 33(9): 759-763. doi: 10.1088/1674-1137/33/9/009
[8]	for the , Crystal Ball , at MAMI , and A . Recoil polarimetry with the Crystal Ball at MAMI. Chinese Physics C, 2009, 33(12): 1183-1188. doi: 10.1088/1674-1137/33/12/021
[9]	LAN Ding , WANG Yu-Ren , ZHANG Yin-Min , WANG Wei , WU Zhong-Hua . Small angle X-ray scattering of the colloidal crystal. Chinese Physics C, 2009, 33(11): 1016-1018. doi: 10.1088/1674-1137/33/11/017
[10]	WU Xi , LEI Yi-An . Comparison between formulas of rotational band for axially symmetric deformed nuclei. Chinese Physics C, 2008, 32(2): 112-119. doi: 10.1088/1674-1137/32/2/008
[11]	CHEN Ruo-Fu , XU Hu-Shan , FAN Rui-Rui , ZHAN Wen-Long , XIAO Guo-Qing , LI Song-Lin , WANG Jian-Song , HUANG Tian-Heng , ZHENG Chuan , YU Yu-Hong , WANG Meng , HU Zheng-Guo , , , , . Property measurement of the CsI(Tl) crystal prepared at IMP. Chinese Physics C, 2008, 32(2): 135-138. doi: 10.1088/1674-1137/32/2/012
[12]	, , , , , , , . Energy loss correction for a crystal calorimeter. Chinese Physics C, 2008, 32(4): 269-274. doi: 10.1088/1674-1137/32/4/006
[13]	PEI Guo-Xi , SUN Yao-Lin , LIU Jin-Tong , CHI Yun-Long , LIU Yu-Cheng , LIU Nian-Zong . BEPCⅡ Positron Source. Chinese Physics C, 2006, 30(1): 66-70.
[14]	Li Junqing . Chaotic Motion of Classical Particles in Axially Symmetric Potentials with Octupole Deformation. Chinese Physics C, 1997, 21(S4): 33-40.
[15]	Liu Changlong , Hou Mingdong , Wang Zhiguang , Cheng Song , Sun Youmei , Zhu Zhiyong , Jin Yunfan , Li Changlin , Wang Yinshu , Meng Qinghua . Dimensional Changes of Amorphous Alloys Under Swift Ar Ion Irradiation. Chinese Physics C, 1997, 21(S4): 93-98.
[16]	Zeng Jinyan , Lei Yian , Wu Wenqing . Construction of Paired States in Axially Symmetric Nuclei. Chinese Physics C, 1995, 19(S4): 405-411.
[17]	Zhang Weining , Liu Yiming , Huo Lei , Jiang Yuzhen , D. Keane , S. Y. Fung . Multiparticle Bose Correlations: Probes for the Granular Source of Quark-Gluon-Plasma Droplets. Chinese Physics C, 1995, 19(S1): 77-85.
[18]	Hao Sanru . A New Symmetric Transformation of the Static Axially Symmetric SDYM Fields. Chinese Physics C, 1993, 17(S2): 111-116.
[19]	Pei Guoxi , Xie Jialin , Zhou Shu , Sun Songlan . Optimization of the BEPC Positron Source. Chinese Physics C, 1990, 14(S2): 125-134.
[20]	Hou Boyu , Li Wei . New Infinite Symmetries in the Stationary, Axially Symmetric Einstein-Maxwell Fields. Chinese Physics C, 1988, 12(S1): 69-76.

Access

Get Citation

XU Cheng-Hai, Robert Chehab, Peter Sievers, Xavier Artru, Michel Chevallier, Olivier Dadoun, PEI Guo-Xi, Vladimir M and Alessandro Variola. A positron source using an axially oriented crystal associated to a granular amorphous converter[J]. Chinese Physics C, 2012, 36(9): 871-878. doi: 10.1088/1674-1137/36/9/014

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2011-12-06
Revised: 2012-01-16

Article Metric

Article Views(2057)
PDF Downloads(255)
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

A positron source using an axially oriented crystal associated to a granular amorphous converter

Received Date: 2011-12-06

Accepted Date: 2012-01-16

Available Online: 2012-09-05

Abstract: A non-conventional positron source using the intense γ radiation from an axially oriented monocrystal which materializes into e⁺e^- pairs in a granular amorphous converter is described. The enhancement of photon radiation by multi-GeV electrons crossing a tungsten crystal along its <111> axis is reported. The resulting enhancement of pair production in an amorphous converter placed 2 meters downstream, is also reported. Sweeping off the charged particles from the crystal by a bending magnet upstream of the converter allows a significant reduction of the deposited energy density. Substituting a granular target made of small spheres for the usual compact one, makes the energy dissipation easier. The deposited energy and corresponding heating are analyzed and solutions for cooling are proposed. The configurations studied here for this kind of positron source allow its consideration for unpolarized positrons for the ILC.

HTML

Reference (1)

A positron source using an axially oriented crystal associated to a granular amorphous converter

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

A positron source using an axially oriented crystal associated to a granular amorphous converter

HTML

目录