2026-09-19T04:56:09Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/361292022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Ulrich J. Becker.
Elliott, Grant (Grant Andrew)
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2007-02-21T11:35:34Z
2007-02-21T11:35:34Z
2006
2006
http://hdl.handle.net/1721.1/36129
72471760
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2006.
Includes bibliographical references (p. 55-56).
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.
by Grant Elliott.
S.B.
56 p.
eng
Massachusetts Institute of Technology
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
Physics.
Ultraviolet laser calibration of drift chambers
Thesis
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