Quality evaluation of CsI photocathodes for the ALICE/HMPID detector

被引:7
作者
Hoedlmoser, H [1 ]
Braem, A
De Cataldo, G
Davenport, M
Di Mauro, A
Franco, A
Gallas, A
Martinengo, P
Nappi, E
Piuz, F
Schyns, E
机构
[1] CERN, CH-1211 Geneva, Switzerland
[2] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
关键词
CsI photocathode; heat enhancement; ageing; RICH; HMPID;
D O I
10.1016/j.nima.2005.08.016
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The facility for the production of the large area (64 x 42 cm(2)) CsI photocathodes for the ALICE/HMPID detector has been equipped with a photo-current scanner system for the in situ measurement of the CA response over the full photosensitive area before transfer to the detector. The photo-current measured on a first batch of 17 PCs, out of the 42 needed to fully equip the seven HMPID modules, has been correlated with test beam measurements in order to define acceptance criteria. Furthermore the system's sensitivity to variations in quantum efficiency allows us to study various effects such as post-deposition heat enhancement or decreased quality due to ageing. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:140 / 145
页数:6
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