CDEX(China Dark matter EXperiment)合作组将在中国锦屏极深地下实验室(CJPL China Jin-Ping deep underground Laboratory)利用极低能阈高纯锗(ULE-HPGe)探测器进行暗物质的直接探测。在地下实验之前,对CsI(Tl)晶体反符合探测器进行...CDEX(China Dark matter EXperiment)合作组将在中国锦屏极深地下实验室(CJPL China Jin-Ping deep underground Laboratory)利用极低能阈高纯锗(ULE-HPGe)探测器进行暗物质的直接探测。在地下实验之前,对CsI(Tl)晶体反符合探测器进行了地面的实验研究。主要包括光导的选择,光反射层的选择,CsI(Tl)晶体的高度一致性测试,不同侧面非均匀性的测试,以及所有晶体的测试结果。通过地面实验的前期工作,我们对反符合探测器有了一定认识,为地下实验做了准备。展开更多
Motivated by measuringγ-rays with CsI crystals, the performance of the CsI(Tl) crystal with the shape as shown in Fig. 1 has been tested. The crystal was grown and machined by IMP crystal group. Firstly, different wr...Motivated by measuringγ-rays with CsI crystals, the performance of the CsI(Tl) crystal with the shape as shown in Fig. 1 has been tested. The crystal was grown and machined by IMP crystal group. Firstly, different wrapping materials have been investigated. The tested wrapping materials are Teflon, Tyvek (1056D from Dupont) and ESR (from 3M). During the test, the crystal was展开更多
文摘CDEX(China Dark matter EXperiment)合作组将在中国锦屏极深地下实验室(CJPL China Jin-Ping deep underground Laboratory)利用极低能阈高纯锗(ULE-HPGe)探测器进行暗物质的直接探测。在地下实验之前,对CsI(Tl)晶体反符合探测器进行了地面的实验研究。主要包括光导的选择,光反射层的选择,CsI(Tl)晶体的高度一致性测试,不同侧面非均匀性的测试,以及所有晶体的测试结果。通过地面实验的前期工作,我们对反符合探测器有了一定认识,为地下实验做了准备。
文摘Motivated by measuringγ-rays with CsI crystals, the performance of the CsI(Tl) crystal with the shape as shown in Fig. 1 has been tested. The crystal was grown and machined by IMP crystal group. Firstly, different wrapping materials have been investigated. The tested wrapping materials are Teflon, Tyvek (1056D from Dupont) and ESR (from 3M). During the test, the crystal was