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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
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Abstract

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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L. Weissman, M. Gai, A. Breskin, R. Chechik, V. Dangendorf, K. Tittelmeier, H. R. Weller. 2006-05-27. Amplification and Scintillation Properties of Oxygen-Rich Gas Mixtures for Optical-TPC Applications. https://doi.org/10.1088/1748-0221%2F1%2F05%2Fp05002

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