A high intensity polarized electron source with on-line polarization analysis
| dc.contributor.advisor | Walters, G. King | |
| dc.creator | Hodge, Lee Allen | |
| dc.date.accessioned | 2018-12-18T21:18:25Z | |
| dc.date.available | 2018-12-18T21:18:25Z | |
| dc.date.issued | 1977 | |
| dc.description | No page 28 | |
| dc.description.abstract | This 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. | |
| dc.format.digitalOrigin | reformatted digital | |
| dc.format.extent | 102 pp | |
| dc.identifier.callno | Thesis Phys. 1977 Hodge | |
| dc.identifier.citation | Hodge, 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>. | |
| dc.identifier.digital | RICE1806 | |
| dc.identifier.uri | https://hdl.handle.net/1911/104179 | |
| dc.language.iso | eng | |
| dc.rights | Copyright 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. | |
| dc.title | A high intensity polarized electron source with on-line polarization analysis | |
| dc.type | Thesis | |
| dc.type.material | Text | |
| thesis.degree.department | Physics | |
| thesis.degree.discipline | Natural Sciences | |
| thesis.degree.grantor | Rice University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Arts |
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