{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25599"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25599","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A search for a new phonon detector","abstract":"\"Progress in the development of a tunable monochromatic phonon detector for use in experiments investigating the transmission of phonons (v > 10 GHz) through 4He at T S 0.1 K and 0 < P < 24 bars is described. The technique studied was the use of a magnetically tuned spin 1/2 system whose change in magnetization with incident phonon flux can be monitored by a pick-up coil coupled to a SQUID magnetometer. Time-of-flight measurements versus pressure and tuning magnetic field were made to test the detection technique and showed good agreement with the measurements of others for phonon velocity and scattering in 4He versus pressure, but limited sensitivity to the magnetic field. We investigate probable causes of the \"\"broad band\"\" spectral behavior of this detector and make recommendations for future work and technique improvement.\"","abstract_html":"&quot;Progress in the development of a tunable monochromatic phonon detector for use in experiments investigating the transmission of phonons (v &gt; 10 GHz) through 4He at T S 0.1 K and 0 &lt; P &lt; 24 bars is described. The technique studied was the use of a magnetically tuned spin 1/2 system whose change in magnetization with incident phonon flux can be monitored by a pick-up coil coupled to a SQUID magnetometer. Time-of-flight measurements versus pressure and tuning magnetic field were made to test the detection technique and showed good agreement with the measurements of others for phonon velocity and scattering in 4He versus pressure, but limited sensitivity to the magnetic field. We investigate probable causes of the &quot;&quot;broad band&quot;&quot; spectral behavior of this detector and make recommendations for future work and technique improvement.&quot;","abstract_has_math":false,"creators":["Rascoe, Daniel Lee"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Mochel, J.M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-06-30T15:49:35Z","date_published":"2011-06-30T15:49:35Z","updated_at":"2026-07-22T22:25:24Z","subjects":["phonon detector","tunable monochromatic phonon detector","magnetically tuned spin","SQUID magnetometer"],"languages":["en"],"rights":["1978 Daniel Lee Rascoe"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["355975"],"render_values":[{"text":"355975","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25599","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Mochel, J.M."]},{"key":"dc:creator","label":"Author","values":["Rascoe, Daniel Lee"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-06-30T15:49:35Z","10000-01-01","1978"]},{"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":["phonon detector","tunable monochromatic phonon detector","magnetically tuned spin","SQUID magnetometer"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1978 Daniel Lee Rascoe"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["355975","http://hdl.handle.net/2142/25599"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"Progress in the development of a tunable monochromatic phonon detector for use in experiments investigating the transmission of phonons (v > 10 GHz) through 4He at T S 0.1 K and 0 < P < 24 bars is described. The technique studied was the use of a magnetically tuned spin 1/2 system whose change in magnetization with incident phonon flux can be monitored by a pick-up coil coupled to a SQUID magnetometer. Time-of-flight measurements versus pressure and tuning magnetic field were made to test the detection technique and showed good agreement with the measurements of others for phonon velocity and scattering in 4He versus pressure, but limited sensitivity to the magnetic field. We investigate probable causes of the \"\"broad band\"\" spectral behavior of this detector and make recommendations for future work and technique improvement.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T15:49:34Z No. of bitstreams: 1 1978_rascoe.pdf: 3586619 bytes, checksum: 11b2155ef81d64304319ce27ff28b52b (MD5)","Made available in DSpace on 2011-06-30T15:49:35Z (GMT). No. of bitstreams: 1 1978_rascoe.pdf: 3586619 bytes, checksum: 11b2155ef81d64304319ce27ff28b52b (MD5) Previous issue date: 1978","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T15:49:35Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:29-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["A search for a new phonon detector"]}]}],"canonical_facts":{"dc:contributor":["Mochel, J.M."],"dc:creator":["Rascoe, Daniel Lee"],"dc:date":["2011-06-30T15:49:35Z","10000-01-01","1978"],"dc:description":["\"Progress in the development of a tunable monochromatic phonon detector for use in experiments investigating the transmission of phonons (v > 10 GHz) through 4He at T S 0.1 K and 0 < P < 24 bars is described. The technique studied was the use of a magnetically tuned spin 1/2 system whose change in magnetization with incident phonon flux can be monitored by a pick-up coil coupled to a SQUID magnetometer. Time-of-flight measurements versus pressure and tuning magnetic field were made to test the detection technique and showed good agreement with the measurements of others for phonon velocity and scattering in 4He versus pressure, but limited sensitivity to the magnetic field. We investigate probable causes of the \"\"broad band\"\" spectral behavior of this detector and make recommendations for future work and technique improvement.\"","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T15:49:34Z No. of bitstreams: 1 1978_rascoe.pdf: 3586619 bytes, checksum: 11b2155ef81d64304319ce27ff28b52b (MD5)","Made available in DSpace on 2011-06-30T15:49:35Z (GMT). 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