A novel current mode operating beam counter based on not preamplified HPDs

被引：8

作者：

Fujiwara, MC

Marchesotti, M ^{[1
]}

机构：

[1] CERN, Div PS, CH-1211 Geneva 23, Switzerland

[2] Univ Tokyo, Bunkyo Ku, Tokyo 113, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2002年 / 484卷 / 1-3期

关键词：

HPD; scintillator; beam detector;

D O I：

10.1016/S0168-9002(01)02033-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A novel system to monitor the intensity and the stability of a bunched beam of similar or equal to1.2 x 10(7) antiprotons ((p) over bars) with a length of similar or equal to250 ns (FWHM) and to measure its trapping efficiency in a Penning trap is described. This system operates parasitically detecting the pions from the annihilation of part of the beam in a degrader. Six plastic scintillators have been coupled from one side to six proximity focused HPDs without preamplifiers and operating in current mode. This device works in the stray field of the ATHENA magnet with no loss of efficiency; the gain can be varied from zero to a few thousands with a precision better than 0.1% and the dynamic range is larger than 8 orders of magnitude. Linearity and stability have been measured up to charge responses of 100 nC, corresponding to the beam completely dumped. The beam counter has been calibrated in two different and independent ways giving consistent results. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：162 / 173

页数：12

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