CERN Accelerating science

Preprint
Report number	CERN-ALI-2000-014 ; CERN-ALICE-PUB-2000-014
Title	Study of the Quantum Efficiency of CsI Photocathodes Exposed to Oxygen and Water Vapour
Author(s)	Di Mauro, A (CERN) ; Martinengo, P (CERN) ; Piuz, François (CERN) ; Schyns, E M (CERN) ; Van Beelen, J B (CERN) ; Williams, T D (CERN)
Affiliation	(CERN)
Publication	2000
Collaboration	ALICE Collaboration
Imprint	19 May 2000
Number of pages	2
Presented at	8th Pisa Meeting on Advanced Detectors : Frontier Detectors for Frontier Physics, La Biodola, Italy, 21 - 27 May 2000
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	The operation of CsI photocathodes in gaseous detectors requires special attention to the purity of the applied gas mixtures.We have studied the influence of oxygen and water vapour contaminations on the performance of CsI photocathodes for theALICE HMPID RICH prototype. Measurements were done through comparison of Cherenkov rings obtained from beamtests. Increased levels of oxygen and water vapour did not show any effect on the performance. The results of this studyfound a direct application in the way of storing CsI photocathodes over long periods nad in particular in the shipment of theHMPID prototype from CERN to the STAR experiment at BNL. (Abstract only available,full text to follow)
Other source	Inspire
Copyright/License	Preprint: (License: CC-BY-4.0)
Submitted by	[email protected]