Performance of drift tubes under high radiation
Name
64181416-MIT.pdf
Description
Full printable version
Size
3.33 MB
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Checksum (MD5)
f42459fa1059fcd3a768623fa1d7364f
Author(s)
Shi, Yue, S.B. Massachusetts Institute of Technology
Advisor(s)
Ulrich J. Becker.
Date Issued
2005
Publisher
Massachusetts Institute of Technology
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).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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