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.
@article{arxiv.0909.3191,
title = {MPGDs in Compton imaging with liquid-xenon},
author = {Duval Samuel and Breskin Amos and Carduner Herve and Cussonneau Jean-Pierre and Lamblin Jacob and Le Ray Patrick and Morteau Eric and Oger Tugdual and Stutzmann Jean-Sebastien and Thers Dominique},
journal= {arXiv preprint arXiv:0909.3191},
year = {2009}
}
Comments
presented at MPGD09, CRETE, June 2009; to be published in JINST Proceedings, PDF, 10 pages, 11 figures