Production technique and quality evaluation of CsI photocathodes for the ALICE/HMPID detector

Abstract The ALICE/HMPID detector has been equipped with 42 large area CsI photocathodes providing a total of 11 m 2 of photosensitive area for the detection of Cherenkov light. This production summary reports on the CsI coating procedure and provides results of the quality monitoring measurements by means of a photocurrent scanner system. The importance of the heat enhancement of CsI PCs is stressed and difficulties due to variations in this process are presented, followed by a discussion of possible influences of production parameters on this process.