Recent Investigations of Cascaded GEM and MHSP detectors

Abstract

We present results from our recent investigations on detectors comprising cascaded gas electron multipliers (GEM) and cascaded GEMs with micro-hole and strip (MHSP) electrodes. We discuss the factors governing the operation of these fast radiation imaging detectors, that have single-charge sensitivity. The issue of ion-backflow and ion-induced secondary effects is discussed in some detail, presenting ways for its reduction and suppression. Applications are presented in the fields of photon imaging in the UV-to-visible spectral range as well as x-ray and neutron imaging.

arXiv comment8 pages, IEEE Nuclear Science Symposium

References in corpus (4)

• Development of a triple GEM UV-photon detector operated in pure CF4 for the PHENIX experiment
• Study of ion feedback in multi-GEM structures
• Physics of multi-GEM structures
• First results from cryogenic avalanche detectors based on gas electron multipliers

Cited by in corpus (6)

• Thick GEM-like hole multipliers: properties and possible applications
• Thick GEM-like multipliers - a simple solution for large area UV-RICH detectors
• Ion-induced effects in GEM & GEM/MHSP gaseous photomultipliers for the UV and the visible spectral range
• Advances in ion back-flow reduction in cascaded gaseous electron multipliers incorporating R-MHSP elements
• MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers
• Measurement of the ion blocking by the passive bi-polar grid