Evidence for thin-film protection of visible photocathodes

Breskin, A.; Chechik, R.; Prager, M.; Shefer, E.

doi:10.1063/1.117968

Cited by 29 publications

(19 citation statements)

References 7 publications

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“…Thin film CsI photocathodes are currently employed in vacuumbased photomultiplier tubes as a solar blind photon detectors [1] as well as in visible sensitive photocathodes as a protecting layers [2,3]. In recent years, CsI photocathodes have been tested successfully in large area gaseous-based photon multiplier detectors consisting of either multiwire proportional chamber (MWPC) or micropattern detectors in high energy physics experiments such as COMPASS [4] and ALICE [5] at CERN, HADES at GSI [6] and PHENIX at RHIC [7] for particle identification purposes.…”

Section: Introductionmentioning

confidence: 99%

Influence of humidity on the photoemission properties and surface morphology of cesium iodide photocathode

Pandit

Dutta

Singh

2012

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Introductionmentioning

confidence: 99%

Influence of humidity on the photoemission properties and surface morphology of cesium iodide photocathode

Pandit

Dutta

Singh

2012

Nuclear Instruments and Methods in Physics Research Section A:

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“…It should be noted that the present model can also be utilized for estimating the electron transport and emission through thin alkali halide films that are employed as protective layers for alkali antimonide visible photocathodes. 54,55 The model can play an important role in optimizing the protection layer thickness for best photocathode performance. In addition, the model could be used for evaluating the UV photoemission properties of recently investigated chemical vapor deposition ͑CVD͒ diamond films.…”

Section: Discussionmentioning

confidence: 99%

An improved model for ultraviolet- and x-ray-induced electron emission from CsI

Boutboul

Akkerman

Gibrekhterman

et al. 1999

Journal of Applied Physics

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A microscopic theoretical model is proposed for calculating the characteristics of ultraviolet photoemission and x-ray secondary electron emission induced from CsI photoconverters. This approach is based on a realistic picture of the basic interactions of photons and induced electrons within the material. Both differential and integral emission characteristics, such as energy spectra and quantum efficiencies, are estimated according to the model and are found to agree, in general, with experimental data. The model-calculated photoemission enhancement under high external electric fields is also considered and is fairly compatible with measured values. The applicability of the model in the field of radiation detectors incorporating solid photoconverters is discussed.

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“…Intensive R&D efforts were made to coat visiblesensitive photocathodes with thin protective films [64,65]. The idea was to deposit films with good electron transport and escape properties (e.g.…”

Section: Number Of Photoelectronsmentioning

confidence: 99%

Advances in gaseous photomultipliers

Chechik

Breskin

2008

Nuclear Instruments and Methods in Physics Research Section A:

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We review latest progress in gaseous photomultipliers (GPM) combining solid photocathodes and various types of novel electron multipliers. Cascaded gaseous electron multipliers (GEM) coated with CsI photocathodes can efficiently replace UVsensitive wire chambers for single-photon recording in Cherenkov and other detectors. Other hole-multipliers with patterned electrodes (Micro-Hole and Strip Plates) and improved ion-blocking properties are discussed; these permit reducing considerably photon-and ion-induced secondary effects. Photon detectors with other electron-multiplier techniques are briefly described, among them GPMs based on Micromegas, capillary-plates, Thick-GEMs and resistive Thick GEMs. The two latter techniques, robust and economically produced, are particularly suited for large-area GPM applications, e.g. in RICH. Cascaded hole-multipliers with very high ion-blocking performance permitted the development and the first demonstration of DC-operated visible-sensitive gaseous photomultipliers with bialkali photocathodes and single-photon sensitivity. Recent progress is described in GPMs operated at cryogenic temperatures for rare-event noble-liquid detectors and medical imaging.

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Evidence for thin-film protection of visible photocathodes

Abstract: Dependence of sensitivity of SnO x thinfilm gas sensors on vacancy defects

Cited by 29 publications

References 7 publications

Influence of humidity on the photoemission properties and surface morphology of cesium iodide photocathode

Influence of humidity on the photoemission properties and surface morphology of cesium iodide photocathode

An improved model for ultraviolet- and x-ray-induced electron emission from CsI

Advances in gaseous photomultipliers

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