Study on the separation of 100 TeV <EM>γ</EM>-rays from cosmic rays for the Tibet AS<EM>γ</EM> experiment

FENG Zhao-Yang; ZHANG Yi; LIU Cheng; FAN Chao; LI Hong-Chao; WANG Bo; WU Han-Rong; HU Hong-Bo; LU Hong; TAN You-Heng

doi:10.1088/1674-1137/35/2/009

Chinese Physics C> 2011, Vol. 35> Issue(2) : 153-157 DOI: 10.1088/1674-1137/35/2/009

Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment

Abstract
HTML
Reference
Related

PDF

Abstract：
A γ/hadron separation analysis is described for the observed air shower events with primary energy above 100 TeV based on the Tibet ASγ detector configuration. The shower age and size parameters are fitted from the measured lateral density distribution and used as discrimination variables. According to the MC simulation while taking into account the systematic uncertainty estimated from data and MC comparison, it is found that 70% of the cosmic ray (CR) background can be rejected while more than 78% of the γ-rays can be retained. Sensitivity for 100 TeV γ-rays observation can thus be improved by at least 40%.

[1]	Yi-Qing Guo , Qiang Yuan . On the knee of Galactic cosmic rays in light of sub-TeV spectral hardenings. Chinese Physics C, 2018, 42(7): 075103. doi: 10.1088/1674-1137/42/7/075103
[2]	Wen-Hui Lin , Bi-Wen Bao , Ze-Jun Jiang , Li Zhang . A possible explanation of the knee of cosmic light component spectrum from 100 TeV to 3 PeV. Chinese Physics C, 2017, 41(10): 105101. doi: 10.1088/1674-1137/41/10/105101
[3]	null , , , , , . Numerical simulation and experimental study of PbWO₄/EPDM and Bi₂WO₆/EPDM for the shielding of γ-rays. Chinese Physics C, 2016, 40(8): 089001. doi: 10.1088/1674-1137/40/8/089001
[4]	Chao Jin , Yi-Qing Guo , Hong-Bo Hu . Spatial dependent diffusion of cosmic rays and the excess of primary electrons derived from high precision measurements by AMS-02. Chinese Physics C, 2016, 40(1): 015101. doi: 10.1088/1674-1137/40/1/015101
[5]	Hui-Yin Wu , Sheng-Ying Zhao , Xiao-Dong Wang , Xian-Ming Zhang , Hui-Rong Qi , Wei Zhang , Ke-Yan Wu , Bi-Tao Hu , Yi Zhang . Discriminating cosmic muons and X-rays based on rise time using a GEM detector. Chinese Physics C, 2016, 40(8): 086001. doi: 10.1088/1674-1137/40/8/086001
[6]	XU Tong-Ye , DU Yan-Yan , WANG Xu , SHAO Ruo-Bin , ZHANG Deng-Feng , ZHU Cheng-Guang . Test of the LHAASO electron detector prototype using cosmic rays. Chinese Physics C, 2014, 38(11): 116004. doi: 10.1088/1674-1137/38/11/116004
[7]	BI Xiao-Jun , CHEN Tian-Lu , CHEN Wen-Yi . Updated study on multi-TeV cosmic-ray modulation with the Tibet Ⅲ air shower array using the east-west method. Chinese Physics C, 2013, 37(3): 035001. doi: 10.1088/1674-1137/37/3/035001
[8]	YANG Zai-Hong , YE Yan-Lin , XIAO Jun , YOU Hai-Bo , LIU HONG-Na , SUN Ye-Lei , WANG Zi-Heng , CHEN Jie . Fast calibration methods using cosmic rays for a neutron detection array. Chinese Physics C, 2012, 36(3): 222-227. doi: 10.1088/1674-1137/36/3/006
[9]	GUAN Xing-Yin , SONG Zhao-Hui , HAN He-Tong . Fluence rate linear response limit of a scintillators to γ-rays. Chinese Physics C, 2011, 35(7): 656-659. doi: 10.1088/1674-1137/35/7/010
[10]	LI Xiao-Ping , PEI Guo-Xi . Experiment studies on the polarized gamma-rays generation at KEK-ATF. Chinese Physics C, 2009, 33(8): 691-695. doi: 10.1088/1674-1137/33/8/018
[11]	CHANG Zhe , LI Xin . Ultra-high energy cosmic rays threshold in Randers-Finsler space. Chinese Physics C, 2009, 33(8): 626-628. doi: 10.1088/1674-1137/33/8/005
[12]	XU XianWu , DING LinKai , CAO PeiYuan , DAI BenZhong , FENG ZhenYong , FU Yu , GUO HongWei , HE Mao , HUANG Qing , HUO AnXiang , JIA HuanYu , LI JinYu , LIU ShaoMin , LU Hong , LU SuiLing , LUO GuangXuan , MEI DongMing . Study on the Absorption of 10TeV γ-Rays Interacting with Soft Photons in Intergalactic Space. Chinese Physics C, 2000, 24(8): 697-701.
[13]	XU XianWu , DING LinKai , CAO PeiYuan , DAI BenZhong , FENG ZhenYong , FU Yu , GUO HongWei , HE Mao , HUANG Qing , HUO AnXiang , JIA HuanYu , LI JinYu , LIU ShaoMin , , , , . Search for TeV Gamma Rays from the Crab Nebula with Tibet Ⅱ/HD AS Array. Chinese Physics C, 2000, 24(6): 473-477.
[14]	Ding Linkai , Dai Benzhong , Feng Zhenyong , Huang Qing , Huo Anxiang , Jia Huanyu , Labaciren , Mei Dongming , Meng Lie , Meng Xianru , Mu Jun , Ren Jingru , Shi Zhizheng , Tan Youheng , Wang Hui , Yu Guangce , Zhaxiciren , Zhaxisanzhu , Zhou Wende , Zhang Chunsheng , Zhang Huimin . Search for 10 TeV Gamma-Ray Bursts with the Tibet Air Shower Array. Chinese Physics C, 1997, 21(S3): 9-16.
[15]	Liu Shaomin , Ding Linkai , Shi Ce , Mu Jun , Wang Hui , Lu Hong , Feng Zhenyong , Ren Jingru , Yu Guangce , Zhou Wende , Meng Xia , , , , , . Correlation Between Sun Shadows of 10TeV Cosmic Rays and Solar Activity. Chinese Physics C, 1997, 21(10): 865-867.
[16]	Xu Chunxian , Dai Hongyue . Statistic Model for Galactic Cosmic Rays. Chinese Physics C, 1997, 21(S2): 25-32.
[17]	Luo Guangxuan , Tan Youheng , Zhang Chunsheng , Dong Yuju , Yuan Peng , Zhang Huimin , Wang Hui , Yuang Yukui , Li Jing . Energy Spectrum of Primary Cosmic Rays at the “Knee” Region Observed with the Huairou Air Shower Array. Chinese Physics C, 1995, 19(S4): 325-331.
[18]	Chen Fengzhi , Nie Chuanhui . The Origin of Anomalous Hard Positrons in the Cosmic Rays Above 10 GeV. Chinese Physics C, 1991, 15(S3): 259-264.
[19]	Zhou Hongyu , Yan Yiming , Fan Guoying , Lan Liqiao , Wang Qi , Sun Shuxu , Hua Ming , Han Chongzhan , Liu Shuzhen , Rong Yaning , Wen Shenlin , Wang Xinfu , Yan Hua , Wang Wanhong , Tang Lin . Study of Associated Gamma Rays from Niobium under 14,9 MeV Neutron Bombardments. Chinese Physics C, 1989, 13(S1): 97-108.
[20]	Zhang Naijian , Wang Chengrui , He Mao , Cao Peiyuan , Li Jinyu , Zou Baotangj Wang Guangjun , Wei Chao . High Energy Hadrons in Atmospheric Cosmic Rays Observed with Fe Emulsion Chambers. Chinese Physics C, 1989, 13(S4): 357-362.

Access

Get Citation

FENG Zhao-Yang, ZHANG Yi, LIU Cheng, FAN Chao, LI Hong-Chao, WANG Bo, WU Han-Rong, HU Hong-Bo, LU Hong and TAN You-Heng. Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment[J]. Chinese Physics C, 2011, 35(2): 153-157. doi: 10.1088/1674-1137/35/2/009

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2010-03-01
Revised: 2010-07-13

Article Metric

Article Views(1561)
PDF Downloads(543)
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

Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment

Received Date: 2010-03-01

Accepted Date: 2010-07-13

Available Online: 2011-02-05

Abstract: A γ/hadron separation analysis is described for the observed air shower events with primary energy above 100 TeV based on the Tibet ASγ detector configuration. The shower age and size parameters are fitted from the measured lateral density distribution and used as discrimination variables. According to the MC simulation while taking into account the systematic uncertainty estimated from data and MC comparison, it is found that 70% of the cosmic ray (CR) background can be rejected while more than 78% of the γ-rays can be retained. Sensitivity for 100 TeV γ-rays observation can thus be improved by at least 40%.

Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment

Abstract：

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment

HTML

目录