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.contributor.author | 조무현 | - |
dc.date.accessioned | 2016-03-31T12:27:22Z | - |
dc.date.available | 2016-03-31T12:27:22Z | - |
dc.date.issued | 2004-01 | - |
dc.identifier.citation | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | - |
dc.identifier.citation | v.44 | - |
dc.identifier.citation | no.5 | - |
dc.identifier.citation | pp.1303-1307 | - |
dc.identifier.issn | 0374-4884 | - |
dc.identifier.other | 2004-OAK-0000004259 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/17930 | - |
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.description.statementofresponsibility | X | - |
dc.publisher | KOREAN PHYSICAL SOC | - |
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 | Conference | - |
dc.contributor.college | 물리학과 | - |
dc.author.google | Park, JH | - |
dc.author.google | Park, S | - |
dc.author.google | Ko, IS | - |
dc.author.google | Cho, MH | - |
dc.author.google | Namkung, W | - |
dc.author.google | Kim, G | - |
dc.author.google | Son, D | - |
dc.relation.volume | 44 | - |
dc.relation.issue | 5 | - |
dc.relation.startpage | 1303 | - |
dc.relation.lastpage | 1307 | - |
dc.contributor.id | 10151947 | - |
dc.publisher.location | KO | - |
dc.relation.journal | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Conference Papers | - |
dc.type.docType | Proceedings Paper | - |
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