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Performance of drift tubes under high radiation

Author(s)
Shi, Yue, S.B. Massachusetts Institute of Technology
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Massachusetts Institute of Technology. Dept. of Physics.
Advisor
Ulrich J. Becker.
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M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582
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Abstract
In this thesis, the aging and the rejuvenation of an ATLAS proportional drift tube are described. Firstly, the Diethorn model of gain is tested using pressure and sense-wire voltage measurements. The drift tube was then aged using P10 gas (Ar:CH₄ 90:10) and a small amount of Si oil vapor, with a tube section of radius [approx.] 1 cm being subjected to UV radiation. An aging current of 30[mu]A was maintained and after the accumulation of 21 coulombs on the wire, the tube gain decreased to less than 70%. Subsequently, the tube was rejuvenated by the treatment with Ar:0₂ 99:1 gas, at reverse wire potential and an reverse "rejuvenation" current of 30[mu]A. Rejuvenation was successful after the accumulation of the equivalent of 3C from this current.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.
 
Includes bibliographical references (p. 63-67).
 
Date issued
2005
URI
http://hdl.handle.net/1721.1/32976
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Massachusetts Institute of Technology
Keywords
Physics.

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