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Ultraviolet laser calibration of drift chambers

Author(s)
Elliott, Grant (Grant Andrew)
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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
We demonstrate the use of a focused ultraviolet laser as a track calibration source in drift chambers, and specifically in a small time projection chamber (TPC). Drift chambers such as TPCs reconstruct the trajectories of charged particles by amplifying and collecting electrons produced by ionization of gas atoms with which the target particle collides. The ultraviolet laser induces a two-photon ionization of gaseous organic compounds along the beam, providing an artificially produced track which may then be used as a calibration source, particularly because it behaves as a particle of infinite momentum whose trajectory is straight in a magnetic field. To this end, we present measurements of the ionization profile of the laser for various gasses and model this ionization in terms of photon flux.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2006.
 
Includes bibliographical references (p. 55-56).
 
Date issued
2006
URI
http://hdl.handle.net/1721.1/36129
Department
Massachusetts Institute of Technology. Dept. of Physics.
Publisher
Massachusetts Institute of Technology
Keywords
Physics.

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  • Physics - Bachelor's degree

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