A high intensity polarized electron source with on-line polarization analysis

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dc.contributor.advisorWalters, G. Kingen_US
dc.creatorHodge, Lee Allenen_US
dc.date.accessioned2018-12-18T21:18:25Zen_US
dc.date.available2018-12-18T21:18:25Zen_US
dc.date.issued1977en_US
dc.descriptionNo page 28en_US
dc.description.abstractThis thesis describes the design, construction and operation of an intense source of polarized electrons suitable for application to most proposed scattering experiments. Polarized electrons are produced in a flowing helium afterglow apparatus by chemiionization reactions involving optically pumped helium 2 S metastables. These electrons are electrostatically extracted from the flow tube and formed into a beam. The electron spin polarization is measured by a unique "on-line" Mott scattering polarization analyzer designed and constructed as an integral source component. In this thesis, applications for a polarized electron beam are reviewed and a comparison of the best available sources is made. The operation of the optically pumped flowing helium afterglow source is described in detail and current and polarization performance characteristics are reported: .1 pA at 5% polarization; 1 juA at 45%; 5 juA at 3% and 1 JJA at 2%. Measurements of the beam emittance show it to be very low (2 mrad-cm at 4 eV). Significant advantages of this source are the ease of electron spin reversal or modulation without a change in beam trajectory and the novel "on-line" Mott detector which allows simultaneous polarization analysis and low energy beam use. Several proposed experiments are suggested with a report on progress to date.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent102 ppen_US
dc.identifier.callnoThesis Phys. 1977 Hodgeen_US
dc.identifier.citationHodge, Lee Allen. "A high intensity polarized electron source with on-line polarization analysis." (1977) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104179">https://hdl.handle.net/1911/104179</a>.en_US
dc.identifier.digitalRICE1806en_US
dc.identifier.urihttps://hdl.handle.net/1911/104179en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleA high intensity polarized electron source with on-line polarization analysisen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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