Performance of the two aerogel Cherenkov detectors of the JLab hall a hadron spectrometer

Journal Article (Journal Article)

We report on the design and commissioning of two silica aerogel Cherenkov detectors with different refractive indices. In particular, very high performance in terms of the number of detected photoelectrons was achieved through an appropriate choice of PMT type and reflector, along with some design considerations. After four years of operation, the number of detected photoelectrons was found to be noticeably reduced in both detectors as a result of contamination, yellowing, of the aerogel material. Along with the details of the set-up, we illustrate the characteristics of the detectors during different time periods and the probable causes of the contamination. In particular we show that the replacement of the contaminated aerogel and parts of the reflecting material has almost restored the initial performance of the detectors. © Società Italians di Fisica.

Full Text

Duke Authors

Cited Authors

  • Marrone, S; Wojtsekhowski, BB; Acha, A; Cisbani, E; Coman, M; Cusanno, F; De Jager, CW; De Leo, R; Gao, H; Garibaldi, F; Higinbotham, DW; Iodice, M; Lerose, JJ; Macchia, D; Markowitz, P; Nappi, E; Palmisano, F; Urciuoli, GM; Van Der Werf, I; Xiang, H; Zhu, LY

Published Date

  • January 1, 2009

Published In

Volume / Issue

  • 124 / 1

Start / End Page

  • 99 - 114

International Standard Serial Number (ISSN)

  • 1594-9982

Digital Object Identifier (DOI)

  • 10.1393/ncb/i2009-10743-5

Citation Source

  • Scopus