{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/23036"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/23036","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Superfluid helium on solid hydrogen","abstract":"We measure the third sound velocity of superfluid helium films as functions of temperature and film coverage on H$\\sb2,$ D$\\sb2,$ and Ar substrates. A new phase of superfluid is discovered on the weak-binding H$\\sb2$ substrate. We observe, in addition to third sound, a new surface mode of wave propagation in superfluid films. On a D$\\sb2$ substrate, we observe a similar phase diagram as on H$\\sb2,$ though only the third sound mode is seen.","abstract_html":"We measure the third sound velocity of superfluid helium films as functions of temperature and film coverage on H$\\sb2,$ D$\\sb2,$ and Ar substrates. A new phase of superfluid is discovered on the weak-binding H$\\sb2$ substrate. We observe, in addition to third sound, a new surface mode of wave propagation in superfluid films. On a D$\\sb2$ substrate, we observe a similar phase diagram as on H$\\sb2,$ though only the third sound mode is seen.","abstract_has_math":true,"creators":["Chen, Ming-Tang"],"institution":"University of Illinois at Urbana-Champaign","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":"2011-05-07T13:59:50Z","date_published":"2011-05-07T13:59:50Z","updated_at":"2026-07-22T22:25:21Z","subjects":["Physics, Condensed Matter"],"languages":["eng"],"rights":["Copyright 1993 Chen, Ming-Tang"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9411583","(UMI)AAI9411583"],"render_values":[{"text":"AAI9411583","href":null,"code":true},{"text":"(UMI)AAI9411583","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/23036","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":["Chen, Ming-Tang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:59:50Z","10000-01-01","1993"]},{"key":"dc:type","label":"Dc Type","values":["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."]},{"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, Condensed Matter"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1993 Chen, Ming-Tang"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9411583","(UMI)AAI9411583","http://hdl.handle.net/2142/23036"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["We measure the third sound velocity of superfluid helium films as functions of temperature and film coverage on H$\\sb2,$ D$\\sb2,$ and Ar substrates. A new phase of superfluid is discovered on the weak-binding H$\\sb2$ substrate. We observe, in addition to third sound, a new surface mode of wave propagation in superfluid films. On a D$\\sb2$ substrate, we observe a similar phase diagram as on H$\\sb2,$ though only the third sound mode is seen.","The measurement of the third sound velocity as a function of coverage in the T = 0K limit is in close agreement with the results from two independent theoretical models. The measured third sound velocity is analyzed to yield a Van der Waals constant and an inert layer for $\\sp4$He on H$\\sb2$ of 13.1 $\\pm$ 8 K $\\cdot$ Layer$\\sp3$ and 0.34 $\\pm$ 0.09 Layers, respectively. These values are compared to our previous results, and the results from other groups.","Made available in DSpace on 2011-05-07T13:59:50Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9411583.pdf: 4152104 bytes, checksum: 2fca9281bf56cd6dcffc4049b19a409a (MD5) Previous issue date: 1993","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:01:44Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:29:18-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Superfluid helium on solid hydrogen"]}]}],"canonical_facts":{"dc:contributor":["Mochel, J.M."],"dc:creator":["Chen, Ming-Tang"],"dc:date":["2011-05-07T13:59:50Z","10000-01-01","1993"],"dc:description":["We measure the third sound velocity of superfluid helium films as functions of temperature and film coverage on H$\\sb2,$ D$\\sb2,$ and Ar substrates. A new phase of superfluid is discovered on the weak-binding H$\\sb2$ substrate. We observe, in addition to third sound, a new surface mode of wave propagation in superfluid films. On a D$\\sb2$ substrate, we observe a similar phase diagram as on H$\\sb2,$ though only the third sound mode is seen.","The measurement of the third sound velocity as a function of coverage in the T = 0K limit is in close agreement with the results from two independent theoretical models. The measured third sound velocity is analyzed to yield a Van der Waals constant and an inert layer for $\\sp4$He on H$\\sb2$ of 13.1 $\\pm$ 8 K $\\cdot$ Layer$\\sp3$ and 0.34 $\\pm$ 0.09 Layers, respectively. These values are compared to our previous results, and the results from other groups.","Made available in DSpace on 2011-05-07T13:59:50Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9411583.pdf: 4152104 bytes, checksum: 2fca9281bf56cd6dcffc4049b19a409a (MD5) Previous issue date: 1993","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:01:44Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:29:18-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9411583","(UMI)AAI9411583","http://hdl.handle.net/2142/23036"],"dc:language":["eng"],"dc:rights":["Copyright 1993 Chen, Ming-Tang"],"dc:subject":["Physics, Condensed Matter"],"dc:title":["Superfluid helium on solid hydrogen"],"dc:type":["text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:21Z"}