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arXiv · 0909.3191

MPGDs in Compton imaging with liquid-xenon

Duval Samuel·Breskin Amos·Carduner Herve·Cussonneau Jean-Pierre·Lamblin Jacob·Le Ray Patrick·Morteau Eric·Oger Tugdual·Stutzmann Jean-Sebastien·Thers Dominique
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Abstract

The interaction of radiation with liquid xenon, inducing both scintillation and ionization signals, is of particular interest for Compton-sequences reconstruction. We report on the development and recent results of a liquid-xenon time-projection chamber, dedicated to a novel nuclear imaging technique named "3 gamma imaging". In a first prototype, the scintillation is detected by a vacuum photomultiplier tube and the charges are collected with a MICROMEGAS structure; both are fully immersed in liquid xenon. In view of the final large-area detector, and with the aim of minimizing dead-zones, we are investigating a gaseous photomultiplier for recording the UV scintillation photons. The prototype concept is presented as well as preliminary results in liquid xenon. We also present soft x-rays test results of a gaseous photomultiplier prototype made of a double Thick Gaseous Electron Multiplier (THGEM) at normal temperature and pressure conditions.

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Duval Samuel, Breskin Amos, Carduner Herve, Cussonneau Jean-Pierre, Lamblin Jacob, Le Ray Patrick, Morteau Eric, Oger Tugdual, Stutzmann Jean-Sebastien, Thers Dominique. 2009-09-17. MPGDs in Compton imaging with liquid-xenon. https://doi.org/10.1088/1748-0221/4/12/p12008

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