Ion-induced effects in GEM & GEM/MHSP gaseous photomultipliers for the UV and the visible spectral range

Abstract

We report on the progress in the study of cascaded GEM and GEM/MHSP gas avalanche photomultipliers operating at atmospheric pressure, with CsI and bialkali photocathodes. They have single-photon sensitivity, ns time resolution and good localization properties. We summarize operational aspects and results, with the highlight of a high-gain stable gated operation of a visible-light device. Of particular importance are the results of a recent ion-backflow reduction study in different cascaded multipliers, affecting the detector's stability and the photocathode's liftime. We report on the significant progress in ion-blocking and provide first results on bialkali-photocathode aging under gas multiplication.

6 pages, 8 figures

References in corpus (5)

• Thick GEM-like hole multipliers: properties and possible applications
• Detectors for Energy-Resolved Fast Neutron Imaging
• First results from cryogenic avalanche detectors based on gas electron multipliers
• Recent Investigations of Cascaded GEM and MHSP detectors
• MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers

Cited by in corpus (15)

• Advances in Thick GEM-like gaseous electron multipliers. Part I: atmospheric pressure operation
• Advances in Gaseous Photomultipliers
• Thick GEM-like multipliers - a simple solution for large area UV-RICH detectors
• Efficient ion blocking in gaseous detectors and its application to gas-avalanche photomultipliers sensitive in the visible-light range
• Development of high-gain gaseous photomultipliers for the visible spectral range
• Further progress in ion back-flow reduction with patterned gaseous hole-multipliers
• Operation of MHSP multipliers in high pressure pure noble-gas
• Advances in ion back-flow reduction in cascaded gaseous electron multipliers incorporating R-MHSP elements
• Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures
• MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers
• The Photon-Assisted Cascaded Electron Multiplier: a Concept for Potential Avalanche-Ion Blocking
• Evolution and Recent Developments of the Gaseous Photon Detectors Technologies
• High-gain DC-mode operated Gaseous Photomultipliers for the visible spectral range
• High pressure operation of the Photon-Assisted Cascaded Electron Multiplier
• Simulation on the Transparency of Electrons and Ion Back Flow for a Time Projection Chamber based on Staggered Multiple THGEMs