Open AccessA multiwire proportional counter for very high counting rates
Author(s) -
Barbosa A. F.,
Guedes G. P.,
Tamura E.,
Pepe I. M.,
Oliveira N. B.
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049597018499
Subject(s) - proportional counter , dead time , detector , discriminator , linearity , physics , wire chamber , amplifier , optics , optoelectronics , cmos , quantum mechanics
Preliminary measurements in a proportional counter with two independently counting wires showed that counting rates up to 10 6 counts s −1 wire −1 can be reached without critical loss in the `true versus measured' linearity relation. Results obtained with a detector containing 30 active wires (2 mm pitch) are presented. With each wire is associated a fast pre‐amplifier and a discriminator channel. Global counting rates in excess of 10 7 events s −1 are reported. Dead‐time losses are corrected by use of simple mathematical‐modelling functions. Data‐acquisition systems are described for one‐dimensional (real‐time) and two‐dimensional (off‐line) position‐sensitive detection systems.