2026-09-20T02:18:23Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/612562022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Gabriella Sciolla.
Lee, Albert H. (Albert Hyunjick)
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2011-02-23T14:37:29Z
2011-02-23T14:37:29Z
2010
http://hdl.handle.net/1721.1/61256
701908252
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.
"May 7, 2010." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 52-53).
Since 1975 a growing body of astronomical evidence has given increasing credibility to the existence of dark matter. Once a simple proposition by Fritz Zwicky to explain discrepancies in the virial motion of galaxy clusters, dark matter can now explain galactic rotation curves, the hierarchical structure of the universe, and the gravitational lensing of the bullet cluster. Nonetheless, the exact particulate nature of dark matter remains a mystery. The Dark Matter Time Projection Chamber (DMTPC) is a directional detection experiment that will be able to measure the energy, length, and direction of nuclear recoil tracks induced by incoming weakly interacting massive particles (WIMPs). In this thesis I analyze nonuniformities in the CCD images used to record the nuclear recoils. I then identify the source of the nonuniformities and describe a method for calibrating the CCD images. The method improves the energy resolution by decreasing the uncertainty by a factor of 4 for the bottom time projection chamber (TPC) and a factor of 3 for the top TPC.
by Albert H. Lee.
S.B.
53 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
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http://dspace.mit.edu/handle/1721.1/7582
Physics.
Point by point gain calibration of the Dark Matter Time Projection Chamber
Point by point gain calibration of the DMTPC
Thesis
application/pdf
Publication
unknown
unknown
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<Abstract>Since 1975 a growing body of astronomical evidence has given increasing credibility to the existence of dark matter. Once a simple proposition by Fritz Zwicky to explain discrepancies in the virial motion of galaxy clusters, dark matter can now explain galactic rotation curves, the hierarchical structure of the universe, and the gravitational lensing of the bullet cluster. Nonetheless, the exact particulate nature of dark matter remains a mystery. The Dark Matter Time Projection Chamber (DMTPC) is a directional detection experiment that will be able to measure the energy, length, and direction of nuclear recoil tracks induced by incoming weakly interacting massive particles (WIMPs). In this thesis I analyze nonuniformities in the CCD images used to record the nuclear recoils. I then identify the source of the nonuniformities and describe a method for calibrating the CCD images. The method improves the energy resolution by decreasing the uncertainty by a factor of 4 for the bottom time projection chamber (TPC) and a factor of 3 for the top TPC.</Abstract>
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