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https://hdl.handle.net/10316/4416
Title: | Ion-induced effects in GEM and GEM/MHSP gaseous photomultipliers for the UV and the visible spectral range | Authors: | Breskin, A. Mörmann, D. Lyashenko, A. Chechik, R. Amaro, F. D. Maia, J. M. Veloso, J. F. C. A. Santos, J. M. F. dos |
Keywords: | Gaseous electron multipliers; Gaseous photomultipliers; Photocathodes | Issue Date: | 2005 | Citation: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 553:1-2 (2005) 46-52 | 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 lifetime. We report on the significant progress in ion-blocking and provide first results on bialkali-photocathode aging under gas multiplication. | URI: | https://hdl.handle.net/10316/4416 | DOI: | 10.1016/j.nima.2005.08.005 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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