Operation of a 1-Liter-Volume Gaseous Argon Scintillation Counter

Details Operation of a 1-Liter-Volume Gaseous Argon Scintillation Counter Operation of a 1-Liter-Volume Gaseous Argon Scintillation Counter

2009-08-22

arxiv.org/abs/0908.3277v1

Physics

Instrumentation and Detectors

29 pages, single-column, double-spaced, 21 figures

Scientific paper

We have built a gas-phase argon ionization detector to measure small nuclear recoil energies (< 10 keVee). In this paper, we describe the detector response to X-ray and gamma calibration sources, including analysis of pulse shapes, software triggers, optimization of gas content, and energy- and position-dependence of the signal. We compare our experimental results against simulation using a 5.9-keV X-ray source, as well as higher-energy gamma sources up to 1332 keV. We conclude with a description of the detector, DAQ, and software settings optimized for a measurement of the low-energy nuclear quenching factor in gaseous argon. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory in part under Contract W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344. Funded by Lab-wide LDRD. LLNL-JRNL-415990-DRAFT.

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