{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/66233"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/66233","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia","abstract":"Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.","abstract_html":"Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.","abstract_has_math":false,"creators":["Malk, Edward George"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-12T20:55:14Z","date_published":"2014-12-12T20:55:14Z","updated_at":"2026-07-22T22:25:55Z","subjects":["Physics, Molecular"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8026552"],"render_values":[{"text":"(UMI)AAI8026552","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/66233","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Malk, Edward George"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-12T20:55:14Z","10000-01-01","1980"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Physics, Molecular"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/66233","(UMI)AAI8026552"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.","Infrared-microwave double-resonance experiments have been performed at higher microwave powers than reported in the literature. Two previously unreported double-resonances have been observed using a CO(,2) laser, aQR(2,1) (P(40)(,9) + 33.05 GHz) and aQR(2,2) (P(40)(,9) + 34.14 GHz). The cells designed and the data acquisition techniques developed are presented.","The linear and non-linear (i.e., single and multiple photon) spectroscopy of ('14)NH(,3) is considered in detail as the subject of an Appendix. Tables of energy levels, ground state inversion transitions, and laser-NH(,3) absorption matches are also included.","Made available in DSpace on 2014-12-12T20:55:14Z (GMT). No. of bitstreams: 1 8026552.pdf: 4068543 bytes, checksum: da538ec6230862db9359c508858dff7a (MD5) Previous issue date: 1980","Embargo set by: Seth Robbins for item 66412 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","137 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980."]},{"key":"dc:title","label":"Title","values":["An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia"]}]}],"canonical_facts":{"dc:creator":["Malk, Edward George"],"dc:date":["2014-12-12T20:55:14Z","10000-01-01","1980"],"dc:description":["Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.","Infrared-microwave double-resonance experiments have been performed at higher microwave powers than reported in the literature. Two previously unreported double-resonances have been observed using a CO(,2) laser, aQR(2,1) (P(40)(,9) + 33.05 GHz) and aQR(2,2) (P(40)(,9) + 34.14 GHz). The cells designed and the data acquisition techniques developed are presented.","The linear and non-linear (i.e., single and multiple photon) spectroscopy of ('14)NH(,3) is considered in detail as the subject of an Appendix. Tables of energy levels, ground state inversion transitions, and laser-NH(,3) absorption matches are also included.","Made available in DSpace on 2014-12-12T20:55:14Z (GMT). No. of bitstreams: 1 8026552.pdf: 4068543 bytes, checksum: da538ec6230862db9359c508858dff7a (MD5) Previous issue date: 1980","Embargo set by: Seth Robbins for item 66412 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","137 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980."],"dc:identifier":["http://hdl.handle.net/2142/66233","(UMI)AAI8026552"],"dc:language":["eng"],"dc:subject":["Physics, Molecular"],"dc:title":["An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia"],"dc:type":["text"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:55Z"}