2026-09-19T00:44:47Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/655402024-03-18T19:43:46Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Stanley Kowalski.
Zou, David
Thomas Jefferson National Accelerator Facility (U.S.)
Massachusetts Institute of Technology. Department of Physics
2011-08-30T15:47:56Z
2011-08-30T15:47:56Z
2011
2011
http://hdl.handle.net/1721.1/65540
746928000
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 41-42).
The Qweak experiment at Jefferson Lab aims to make the first precision measurement of the proton's weak charge, QP = 1 - 4 sin 2 9w at Q2 = 0.026GeV 2 . Given the precision goals in the Qweak experiment, the electron beam polarization must be known to an absolute uncertainty of 1%. A new Compton polarimeter has been built and installed in Hall C in order to make this important measurement. Compton polarimetry has been chosen for its ability to deliver continuous on-line measuremnts at high currents necessary for Qweak (up to 180pzA). In this thesis, we collected and analyzed electron beam polarization data using the Qweak Compton polarimeter. Currently, data from the Compton can already be used to calculate preliminary values of experimental physics asymmetries and also the electron beam polarization. These preliminary results are promising indications that Qweak will be able to meet its stated precision goals.
by David Zou.
S.B.
42 p.
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Physics.
Thomas Jefferson National Accelerator Facility (U.S.)
Compton polarimeter for Qweak Experiment at Jefferson Laboratory
Thesis
application/pdf
Publication
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<Abstract>The Qweak experiment at Jefferson Lab aims to make the first precision measurement of the proton's weak charge, QP = 1 - 4 sin 2 9w at Q2 = 0.026GeV 2 . Given the precision goals in the Qweak experiment, the electron beam polarization must be known to an absolute uncertainty of 1%. A new Compton polarimeter has been built and installed in Hall C in order to make this important measurement. Compton polarimetry has been chosen for its ability to deliver continuous on-line measuremnts at high currents necessary for Qweak (up to 180pzA). In this thesis, we collected and analyzed electron beam polarization data using the Qweak Compton polarimeter. Currently, data from the Compton can already be used to calculate preliminary values of experimental physics asymmetries and also the electron beam polarization. These preliminary results are promising indications that Qweak will be able to meet its stated precision goals.</Abstract>
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