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Detection of the primary scintillation light from dense Ar, Kr and Xe with novel photosensitive gaseous detectors

L. Periale·V. Peskov·P. Carlson·T. Francke·P. Pavlopoulos·P. Picchi·F. Pietropaolo
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Abstract

The detection of primary scintillation light in combination with the charge or secondary scintillation signals is an efficient technique to determine the events t=0 as well as particle / photon separation in large mass TPC detectors filled with noble gases and/or condensed noble gases. The aim of this work is to demonstrate that costly photo-multipliers could be replaced by cheap novel photosensitive gaseous detectors: wire counters, GEMs or glass capillary tubes coupled with CsI photocathodes. We have performed systematic measurements with Ar, Kr and Xe gas at pressures in the range of 1-50 atm as well as some preliminary measurements with liquid Xe and liquid Ar. With the gaseous detectors we succeeded in detecting scintillation light produced by 22 keV X-rays with an efficiency of close to 100%. We also detected the scintillation light produced by bs (5 keV deposit energy) with an efficiency close to 25%. Successful detection of scintillation from 22 keV gammas open new experimental possibilities not only for nTOF and ICARUS experiments, but also in others, like WIMPs search through nuclear recoil emission.

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L. Periale, V. Peskov, P. Carlson, T. Francke, P. Pavlopoulos, P. Picchi, F. Pietropaolo. 2001-06-15. Detection of the primary scintillation light from dense Ar, Kr and Xe with novel photosensitive gaseous detectors. https://doi.org/10.1016/s0168-9002(01)01779-x

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