AGING PROPERTIES OF STRAW PROPORTIONAL TUBES WITH A XE-CO2-CF4 GAS-MIXTURE

被引：10

作者：

CAPEANS, M ^{[1
]}

GARABATOS, C ^{[1
]}

HEUER, RD ^{[1
]}

MACKENZIE, R ^{[1
]}

MEYER, TC ^{[1
]}

SAULI, F ^{[1
]}

SILANDER, K ^{[1
]}

BONDARENKO, VG ^{[1
]}

GRIGORIEV, VA ^{[1
]}

MARKINA, JS ^{[1
]}

KRUGLOV, AA ^{[1
]}

机构：

[1] MOSCOW PHYS ENGN INST,MOSCOW,RUSSIA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1993年 / 337卷 / 01期

关键词：

D O I：

10.1016/0168-9002(93)91144-C

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Studies of the behaviour of straw proportional tubes, 4 mm in diameter, under sustained irradiation were carried out with a Xe-CO2-CF4 [50-30-20] gas mixture. No observable gain drop has been found to affect the tubes up to reasonable doses (less-than-or-equal-to 1 C/cm of wire). The chemical modification of the gas composition, causing the formation of electronegative, relatively stable species during the avalanche processes in a highly irradiated straw tube, is suggested to be responsible for a decrease of the pulse height in a second proportional counter (12.5 mm drift distance) operated with this (radical-enriched) gas mixture. Finally, we have observed that, for a straw tube operated at gain of a few times 10(4), there is a contribution to the total collected charge coming from few, very large pulses, probably due to occasional transition to a limited streamer regime.

引用

页码：122 / 126

页数：5

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