A hadron blind detector for the PHENIX experiment at RHIC

Author

Tserruya, I. ; Azmoun, B. ; Woody, C. ; Sawada, S. ; Yokkaichi, S. ; Milov, A. ; Gunji, T. ; Hamagaki, H. ; Inuzuka, M. ; Isobe, T. ; Morino, Y. ; Oda, S. ; Ozawa, K. ; Saito, S. ; Sakaguchi, T. ; Yamaguchi, Y. ; Fraenkel, Z. ; Kozlov, A. ; Naglis, M. ; R

Author_Institution

Dept. of Particle Phys., Weizmann Inst. of Sci., Israel

Volume

2

fYear

2004

fDate

16-22 Oct. 2004

Firstpage

1137

Abstract

A hadron blind detector (HBD) is being developed for an upgrade of the PHENIX experiment at RHIC. The HBD is a windowless Cherenkov detector, operated with pure CF₄ in a special proximity focus configuration. The detector consists of a 50 cm long radiator, directly coupled to a triple GEM detector which has a CsI photocathode evaporated on the top surface of the uppermost GEM foil, and a pad readout at the bottom of the GEM stack. Detailed studies of the detector performance, including hadron rejection, figure of merit, N₀, number of photoelectrons and efficiency are presented. These studies include measurements performed with a UV lamp, an ⁵⁵Fe X-ray source and an ²⁴¹Am alpha source. Results will also be given on aging studies of the GEM foils and the CsI photocathode in pure CF₄.

Keywords

Cherenkov counters; X-ray apparatus; X-ray detection; alpha-particle detection; electron multiplier detectors; nuclear electronics; photocathodes; position sensitive particle detectors; readout electronics; ultraviolet detectors; 50 cm; ²⁴¹Am alpha source; ⁵⁵Fe X-ray source; CsI photocathode; GEM foil; PHENIX experiment; RHIC; UV lamp; detector performance; hadron blind detector; hadron rejection; pad readout; photoelectron number; proximity focus configuration; pure CF₄; pure tetrafluoromethane; triple GEM detector; windowless Cherenkov detector; Aging; Cathodes; Detectors; Electron beams; Energy measurement; Iron; Lamps; Mesons; Neural networks; Performance evaluation;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2004 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-8700-7

Electronic_ISBN

1082-3654

Type

conf

DOI

10.1109/NSSMIC.2004.1462403

Filename

1462403