Title of article
Study of the quantum efficiency of CsI photo-cathodes exposed to oxygen and water vapour
Author/Authors
Mauro، نويسنده , , A.Di and Martinengo، نويسنده , , P. and Piuz، نويسنده , , F. and Schyns، نويسنده , , E. and van Beelen، نويسنده , , J. and Williams، نويسنده , , T.D.، نويسنده ,
Pages
3
From page
584
To page
586
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 the ALICE HMPID RICH prototype. Measurements were done through comparison of Cherenkov rings obtained from beam tests. Increased levels of oxygen and water vapour did not show any effect on the performance. The results of this study found a direct application in the way of storing CsI photocathodes over long periods and in particular in the shipment of the HMPID prototype from CERN to the STAR experiment at BNL.
Keywords
Cesium iodide , Water moisture , Photocathode , Ring imaging detector , Outgassing , Quantum efficiency
Journal title
Astroparticle Physics
Record number
2014622
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