{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25701"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25701","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Incoherent scattering of microwaves from enhanced density fluctuations in a DC-discharge","abstract":"\"Radiation of 9375 MHz is incident on a cylindrical neon discharge enclosed in a 1\"\" square waveguide and incoherent scattering in the upper sideband is investigated. Scattering is observed in the backward and forward directions from the naturally enhanced density fluctuations in two electron plasma modes for gas pressures between -3 -3\"\" 3.8xlO Torr and 8.0XlO Torr. The measured electron mode frequencies are in general agreement with other experiments. The enhancement, varying between 30 and 8000 times the estimated thermal value is correlated over most of the pressure range to excess superthermal electrons present in the discharge, as measured by a Langmuir probe.\"","abstract_html":""Radiation of 9375 MHz is incident on a cylindrical neon discharge enclosed in a 1"" square waveguide and incoherent scattering in the upper sideband is investigated. Scattering is observed in the backward and forward directions from the naturally enhanced density fluctuations in two electron plasma modes for gas pressures between -3 -3"" 3.8xlO Torr and 8.0XlO Torr. The measured electron mode frequencies are in general agreement with other experiments. The enhancement, varying between 30 and 8000 times the estimated thermal value is correlated over most of the pressure range to excess superthermal electrons present in the discharge, as measured by a Langmuir probe."","abstract_has_math":false,"creators":["Carr, Wayne Elbert"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Raether, M.J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-07T17:43:19Z","date_published":"2011-07-07T17:43:19Z","updated_at":"2026-07-22T22:25:26Z","subjects":["incoherent scattering of microwaves","enhanced density fluctuations","DC-discharge","cylindrical neon discharge"],"languages":["en"],"rights":["1967 Wayne Elbert Carr"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["6088144"],"render_values":[{"text":"6088144","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25701","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Raether, M.J."]},{"key":"dc:creator","label":"Author","values":["Carr, Wayne Elbert"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-07-07T17:43:19Z","10000-01-01","1967"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["incoherent scattering of microwaves","enhanced density fluctuations","DC-discharge","cylindrical neon discharge"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1967 Wayne Elbert Carr"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["6088144","http://hdl.handle.net/2142/25701"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"Radiation of 9375 MHz is incident on a cylindrical neon discharge enclosed in a 1\"\" square waveguide and incoherent scattering in the upper sideband is investigated. Scattering is observed in the backward and forward directions from the naturally enhanced density fluctuations in two electron plasma modes for gas pressures between -3 -3\"\" 3.8xlO Torr and 8.0XlO Torr. The measured electron mode frequencies are in general agreement with other experiments. The enhancement, varying between 30 and 8000 times the estimated thermal value is correlated over most of the pressure range to excess superthermal electrons present in the discharge, as measured by a Langmuir probe.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:43:19Z No. of bitstreams: 1 1967_carr.pdf: 2394341 bytes, checksum: 7cba4acdeb3429e1ba79fdd291b2abb7 (MD5)","Made available in DSpace on 2011-07-07T17:43:19Z (GMT). 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Scattering is observed in the backward and forward directions from the naturally enhanced density fluctuations in two electron plasma modes for gas pressures between -3 -3\"\" 3.8xlO Torr and 8.0XlO Torr. The measured electron mode frequencies are in general agreement with other experiments. The enhancement, varying between 30 and 8000 times the estimated thermal value is correlated over most of the pressure range to excess superthermal electrons present in the discharge, as measured by a Langmuir probe.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:43:19Z No. of bitstreams: 1 1967_carr.pdf: 2394341 bytes, checksum: 7cba4acdeb3429e1ba79fdd291b2abb7 (MD5)","Made available in DSpace on 2011-07-07T17:43:19Z (GMT). No. of bitstreams: 1 1967_carr.pdf: 2394341 bytes, checksum: 7cba4acdeb3429e1ba79fdd291b2abb7 (MD5) Previous issue date: 1967","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-07T17:43:19Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:47-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["6088144","http://hdl.handle.net/2142/25701"],"dc:language":["en"],"dc:rights":["1967 Wayne Elbert Carr"],"dc:subject":["incoherent scattering of microwaves","enhanced density fluctuations","DC-discharge","cylindrical neon discharge"],"dc:title":["Incoherent scattering of microwaves from enhanced density fluctuations in a DC-discharge"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:26Z"}