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Titolo:
PHOTOELECTRON BACKSCATTERING EFFECTS IN PHOTOEMISSION FROM CSI INTO GAS MEDIA
Autore:
DIMAURO A; NAPPI E; POSA F; BRESKIN A; BUZULUTSKOV A; CHECHIK R; BIAGI SF; PAIC G; PIUZ F;
Indirizzi:
IST NAZL FIS NUCL I-70126 BARI ITALY POLITECN BARI BARI ITALY WEIZMANN INST SCI,DEPT PARTICLE PHYS IL-76100 REHOVOT ISRAEL UNIV LIVERPOOL,DEPT PHYS LIVERPOOL L69 3BX MERSEYSIDE ENGLAND SUBATECH NANTES FRANCE CERN CH-1211 GENEVA SWITZERLAND
Titolo Testata:
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment
fascicolo: 1-2, volume: 371, anno: 1996,
pagine: 137 - 142
SICI:
0168-9002(1996)371:1-2<137:PBEIPF>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
A. Dimauro et al., "PHOTOELECTRON BACKSCATTERING EFFECTS IN PHOTOEMISSION FROM CSI INTO GAS MEDIA", Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 371(1-2), 1996, pp. 137-142

Abstract

The photoemission from solid surfaces into gas is important in view of the application of solid photocathodes in fast-RICH devices. The photoemission from CsI into gas has been investigated in He-, Ar- and CH4-based gas mixtures as a function of the electric field at the photocathode surface. Measurements were made both in laboratory, with a UV source, and in a beam with a RICH detector. The results are interpreted in terms of current models of electron transport in gas. The electron collection efficiency, below gas ionization threshold, is reduced by backscattering. This phenomenon is particularly important in He-based gas mixtures. In CH4 and Ar/CH4 mixtures the backscattering is very low. At high electric field, under charge multiplication, a full collection efficiency, similar to that in vacuum, is obtained in all gases investigated. We discuss the parameters governing the choice of the gas mixture in this kind of photon detectors.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 09:29:40