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arXiv physics/0602188physics.ins-detastro-phnucl-exnucl-th
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光学TPC用富氧混合气体的放大和闪烁特性

Amplification and Scintillation Properties of Oxygen-Rich Gas Mixtures for Optical-TPC Applications

L. Weissman, M. Gai, A. Breskin, R. Chechik, V. Dangendorf, K. Tittelmeier, H. R. Weller

摘要:

我们研究了含氧混合气体中雪崩的电子放大和光发射。在这项工作中研究的混合物包括,除其他外,CO2和N2O与三乙胺(TEA)或N2混合。研究了双台阶平行能隙倍增器(DSPG)和厚气电子倍增器(THGEM)。从CO2+N2和CO2+TEA测量到高光产额,尽管具有不同的发射光谱。我们观察到N2和TEA的特征波长发射,并使用聚合物波长移位器将TEA紫外光转换为可见光谱。这些测量的结果表明,在TPC目标探测器设计的研究的截面的16 O(g,a)12 C反应,在核天体物理学的中心问题的电离轨道的光学记录的适用性。

英文摘要:

We studied electron amplification and light emission from avalanches in oxygen-containing gas mixtures. The mixtures investigated in this work included, among others, CO2 and N2O mixed with Triethylamine (TEA) or N2. Double-Step Parallel Gap (DSPG) multipliers and THick Gas Electron Multipliers (THGEM) were investigated. High light yields were measured from CO2+N2 and CO2+TEA, though with different emission spectra. We observed the characteristic wave-length emission of N2 and of TEA and used a polymer wave-length shifter to convert TEA UV-light into the visible spectrum. The results of these measurements indicate the applicability of optical recording of ionizing tracks in a TPC target-detector designed to study the cross section of the 16O(g,a)12C reaction, a central problem in nuclear astrophysics.

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