Ultraviolet laser calibration of drift chambers
Name
72471760-MIT.pdf
Description
Full printable version
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2.05 MB
Format
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Checksum (MD5)
72904be1787826bdb763e40a6d9ddea5
Author(s)
Elliott, Grant (Grant Andrew)
Advisor(s)
Ulrich J. Becker.
Date Issued
2006
Publisher
Massachusetts Institute of Technology
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).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
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