DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, JH | - |
dc.contributor.author | Park, S | - |
dc.contributor.author | Ko, IS | - |
dc.contributor.author | Cho, MH | - |
dc.contributor.author | Namkung, W | - |
dc.contributor.author | Kim, G | - |
dc.contributor.author | Son, D | - |
dc.date.accessioned | 2017-07-19T01:59:37Z | - |
dc.date.available | 2017-07-19T01:59:37Z | - |
dc.date.created | 2009-02-28 | - |
dc.date.issued | 2004-05 | - |
dc.identifier.issn | 0374-4884 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/31905 | - |
dc.description.abstract | Spin-polarized electrons have been generated from a GaAs crystal whose surface was coated with a NEA (negative electron affinity) layer. The electron polarization was measured using the Mott polarimeter. The work was done utilizing the photocathode test-stand in the Pohang Accelerator Laboratory. That stand was constructed to characterize GaAs photocathodes for use in PES (polarized slectron source) development. The test-stand consists of a GaAs crystal, devices for NEA surface production, an electrostatic bend, and a Mott polarimeter. All components, except the polarimeter are contained in a extremely high vacuum (XHV) chamber that can provide a vacuum better than 5 x 10(-10) Torr. Circularly polarized photons are provided by a multi-color laser with quarter-wavelength plates. In order to have a clean surface on the GaAs crystal, which is essential for successful production of a NEA layer, we have adopted the method of hydrogen glow-discharge cleaning. With careful cathode cleaning and activation (NEA surface production), spin-polarized electrons are routinely generated with a quantum efficiency of 3.01% and a polarization of 30.4%. | - |
dc.language | English | - |
dc.publisher | KOREAN PHYSICAL SOC | - |
dc.relation.isPartOf | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | - |
dc.subject | PES (polarized electron source) | - |
dc.subject | NEA (negative electron affinity) | - |
dc.subject | GaAs photocathode | - |
dc.subject | quantum efficiency | - |
dc.subject | polarization | - |
dc.subject | Mott polarimeter | - |
dc.title | Studies of the test stand of the polarized electron cathode at the Pohang Accelerator Laboratory | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.44, no.5, pp.1303 - 1307 | - |
dc.identifier.wosid | 000221461300015 | - |
dc.date.tcdate | 2019-03-01 | - |
dc.citation.endPage | 1307 | - |
dc.citation.number | 5 | - |
dc.citation.startPage | 1303 | - |
dc.citation.title | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | - |
dc.citation.volume | 44 | - |
dc.contributor.affiliatedAuthor | Ko, IS | - |
dc.contributor.affiliatedAuthor | Cho, MH | - |
dc.contributor.affiliatedAuthor | Namkung, W | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 5 | - |
dc.type.docType | Article; Proceedings Paper | - |
dc.subject.keywordAuthor | PES (polarized electron source) | - |
dc.subject.keywordAuthor | NEA (negative electron affinity) | - |
dc.subject.keywordAuthor | GaAs photocathode | - |
dc.subject.keywordAuthor | quantum efficiency | - |
dc.subject.keywordAuthor | polarization | - |
dc.subject.keywordAuthor | Mott polarimeter | - |
dc.relation.journalWebOfScienceCategory | Physics, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.relation.journalResearchArea | Physics | - |
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