Wednesday (MPGD mid-morning session)
- Maxim TITOV (CEA Saclay)
7/3/13, 11:15 AM
We have performed a systematic investigation of the gain properties of the GEM foil with copper-clad liquid crystal polymer insulator (LCP-GEM), which will be applied to the photoelectric X-ray polarimeter using a TPC technique for NASA’s sounding rocket experiment XACT. The pure dimethyl ether (DME) as TPC gas is slow drift velocity and small diffusion. We anticipate that the optimum DME...
Andrey Sokolov (Ecole Polytechnique)
7/3/13, 11:40 AM
Two-phase Cryogenic Avalanche Detectors (CRADs) with THGEM multipliers have become an emerging technique for rare-event experiments. In this work the performance of two-phase CRADs in Ar with THGEM/GAPD-matrix optical readout has for the first time demonstrated in terms of high spatial resolution and low detection threshold. Here the double-THGEM charge multiplier was combined with a 3x3...
Javier Gracia Garza (Universidad de Zaragoza (ES))
7/3/13, 12:05 PM
Axion helioscopes aim at the detection of solar axions through their conversion into x-rays in laboratory magnetic fields. The use of low background and low energy threshold x-ray detectors is an essential component contributing to the sensitivity of these searches. Micromegas readouts operated in a Time Projection Chamber have demonstrated they can accomplish these goals. The possibility of...
7/3/13, 12:25 PM
We have fabricated a semi-flight-ready micro GEM-TPC for the X-ray polarimeter telescope onboard the NASA's Gravity and Extremely Magnetism Small Explorer (GEMS) mission. The use of GEM-TPC in space is very different technical challenge from the uses in celerator based experiments. We carefully tested various issues to ensure two-years lifetime of the detector in orbit, including aging of the...
7/3/13, 12:50 PM
AstroBox, was developed to perform low energy proton spectroscopy from β-delayed proton emitters of interest to astrophysics studies: Energetic precursor nuclei are identified and stopped in the gas volume of the detector. The subsequent β or β-proton decay trace ionized paths in the gas. The ionization electrons are drifted in an electric field and are amplified by employing a Micro Pattern...