Performance study for the photon measurements of the upgraded LHCf calorimeters with Gd2SiO5(GSO) scintillators
Performance study for the photon measurements of the upgraded LHCf calorimeters with Gd2SiO5(GSO) scintillators
复制标题
使用 Gd2SiO5(GSO) 闪烁体升级的 LHCf 热量计的光子测量性能研究
DOI：
10.1088/1748-0221/12/03/p03023
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发表时间：
2017
影响因子：
1.3
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Makino Y.;Tiberio A.;Adriani O.;Berti E.;Bonechi L.;Bongi M.;Caccia Z.;D'Alessandro R.;Prete M. Del;Detti S.;Haguenauer M.;Itow Y.;Iwata T.;Kasahara K.;Masuda K.;Matsubayashi E.;Menjo H.;Mitsuka G.;Muraki Y.;Papini P.;Ricciarini S.;Sako T.;et al.
大型强子对撞机正向实验（LHCf）的目的是了解与宇宙线空气簇射发展相关的强子相互作用过程。利用Gd 2SiO 5（GSO）超导体，研制了质子-质子碰撞的抗辐射探测器. 2015年，欧洲核子研究中心SPS T2-H4线使用100-250 GeV的电子束和150-250 GeV的μ子束完成了对这种探测器进行光子测量的校准。经过逐道绝对能量标定后，对能量大于100 GeV的电子，能量分辨率优于3%。经过闪烁体非均匀性和簇射泄漏效应的校正后，量热计的能量标度的位置依赖性降低到1%的水平。新的簇射成像探测器是一个插入量热计中的GSO棒速迹仪，其位置分辨率对于200 GeV电子为100 μm。Monte Carlo模拟很好地解释了实验结果。我们已经证实，新的探测器满足要求的LHCf实验在13 TeV的。
The Large Hadron Collider forward (LHCf) experiment was motivated to understand the hadronic interaction processes relevant to cosmic-ray air shower development. We have developed radiation-hard detectors with the use of Gd 2 SiO 5 (GSO) scintillators for proton-proton√ s= 13 TeV collisions. Calibration of such detectors for photon measurement has been completed at the CERN SPS T2-H4 line in 2015 using electron beams of 100–250 GeV and muon beams of 150–250 GeV. After the channel-by-channel absolute energy calibration, the energy resolution of the calorimeters is confirmed to be better than 3% for electrons with energy above 100 GeV. The position dependence of the energy scale of the calorimeters was reduced to the level of 1% after the corrections for scintillator nonuniformity and the shower leakage effect. The position resolution of the new shower imaging detector, a GSO-bar hodoscope interleaved in the calorimeter, was 100 μm for 200 GeV electrons. The experimental results are well explained by Monte Carlo simulations. We have confirmed that the new detectors meet the requirement of the LHCf experiment at√ s= 13 TeV.