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arXiv physics/0502071physics.ins-detastro-phnucl-ex
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大面积雪崩光电二极管在液体氙电离闪烁室中的性能

Performance of a Large Area Avalanche Photodiode in a Liquid Xenon Ionization and Scintillation Chamber

K. Ni, E. Aprile, D. Day, K. L. Giboni, J. A. M. Lopes, P. Majewski, M. Yamashita

摘要:

用大面积雪崩光电二极管(LAAPD)探测了α粒子、电子和γ射线在液体氙(LXe)中产生的闪烁光。测量α闪烁产率作为施加的电场的函数。我们估计LAAPD的量子效率为45%。来自零电场下的光测量的最佳能量分辨率对于来自Bi-207的976 keV内转换电子为7.5%(sigma),并且对于来自Am-241的5.5 MeV α粒子为2.6%(sigma)。用于这些测量的检测器也作为网格电离室操作以测量电荷产额。我们证实,在LC 10中使用LAAPD不会引入抑制自由电子漂移的杂质。

英文摘要:

Scintillation light produced in liquid xenon (LXe) by alpha particles, electrons and gamma-rays was detected with a large area avalanche photodiode (LAAPD) immersed in the liquid. The alpha scintillation yield was measured as a function of applied electric field. We estimate the quantum efficiency of the LAAPD to be 45%. The best energy resolution from the light measurement at zero electric field is 7.5%(sigma) for 976 keV internal conversion electrons from Bi-207 and 2.6%(sigma) for 5.5 MeV alpha particles from Am-241. The detector used for these measurements was also operated as a gridded ionization chamber to measure the charge yield. We confirm that using a LAAPD in LXe does not introduce impurities which inhibit the drifting of free electrons.

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