{"id":{"repo_id":"ubc","oai_identifier":"oai:circle.library.ubc.ca:2429/1952"},"canonical_url":"https://search.dev.ndltd.org/etd/ubc/oai:circle.library.ubc.ca:2429/1952","repository":{"repo_id":"ubc","name":"University of British Columbia","base_url":"http://circle.library.ubc.ca/oai/request"},"display":{"title":"Further investigation of the planar array of superheated superconductors","abstract":"Three sizes of the Planar Array of Superheated Superconductors (PASS) were studied. Several 100 x 100 arrays, 250 x 250 arrays and 100 x 1 line arrays of tin squares were fabricated with the photolithography techniques, and then melted in a vacuum chamber. Phase transition curves were mapped out at the earth's field (t— 0.05 mT), 2 mT,4 mT and 4.7 mT for the 100 x 100 array of tin spheres with radius of 12 tem and center-to-center spacing of 70 pm. Radiation tests were also made using a low energy7—source. Time distribution curves for granule flipping were measured and compared with the calculated response, and good agreement was obtained. Three layers of 250 x 250 tin arrays with granule radius of 3 ictm and center-to-center spacing of 40 ,am, as well as a single 250 x 250 array, were compared. The spreads of transition temperatures were essentially the same. The measured response of the three—layer arrays to 7-rays also agreed with the calculated result.","abstract_html":"Three sizes of the Planar Array of Superheated Superconductors (PASS) were studied. Several 100 x 100 arrays, 250 x 250 arrays and 100 x 1 line arrays of tin squares were fabricated with the photolithography techniques, and then melted in a vacuum chamber. Phase transition curves were mapped out at the earth's field (t— 0.05 mT), 2 mT,4 mT and 4.7 mT for the 100 x 100 array of tin spheres with radius of 12 tem and center-to-center spacing of 70 pm. Radiation tests were also made using a low energy7—source. Time distribution curves for granule flipping were measured and compared with the calculated response, and good agreement was obtained. Three layers of 250 x 250 tin arrays with granule radius of 3 ictm and center-to-center spacing of 40 ,am, as well as a single 250 x 250 array, were compared. The spreads of transition temperatures were essentially the same. The measured response of the three—layer arrays to 7-rays also agreed with the calculated result.","abstract_has_math":false,"creators":["Lu, Yunfei"],"institution":"University of British Columbia","degree_name":"Master of Science - MSc","degree_level":"master's","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1993,"date_issued":"1993","date_published":"1993","updated_at":"2026-07-24T05:07:24Z","subjects":[],"languages":["eng"],"rights":["For non-commercial purposes only, such as research, private study and education. 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Time distribution curves for granule flipping were measured and compared with the calculated response, and good agreement was obtained. Three layers of 250 x 250 tin arrays with granule radius of 3 ictm and center-to-center spacing of 40 ,am, as well as a single 250 x 250 array, were compared. The spreads of transition temperatures were essentially the same. The measured response of the three—layer arrays to 7-rays also agreed with the calculated result."]},{"key":"dc:format","label":"Dc Format","values":["3179304","application/pdf"]},{"key":"dc:title","label":"Title","values":["Further investigation of the planar array of superheated superconductors"]}]}],"canonical_facts":{"dc:creator":["Lu, Yunfei"],"dc:date":["1993"],"dc:description":["Three sizes of the Planar Array of Superheated Superconductors (PASS) were studied. Several 100 x 100 arrays, 250 x 250 arrays and 100 x 1 line arrays of tin squares were fabricated with the photolithography techniques, and then melted in a vacuum chamber. Phase transition curves were mapped out at the earth's field (t— 0.05 mT), 2 mT,4 mT and 4.7 mT for the 100 x 100 array of tin spheres with radius of 12 tem and center-to-center spacing of 70 pm. Radiation tests were also made using a low energy7—source. Time distribution curves for granule flipping were measured and compared with the calculated response, and good agreement was obtained. Three layers of 250 x 250 tin arrays with granule radius of 3 ictm and center-to-center spacing of 40 ,am, as well as a single 250 x 250 array, were compared. The spreads of transition temperatures were essentially the same. The measured response of the three—layer arrays to 7-rays also agreed with the calculated result."],"dc:format":["3179304","application/pdf"],"dc:identifier":["http://hdl.handle.net/2429/1952","http://circle.library.ubc.ca/bitstream/2429/1952/1/ubc_1993_fall_lu_yunfei.pdf"],"dc:language":["eng"],"dc:publisher":["University of British Columbia"],"dc:rights":["For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use."],"dc:title":["Further investigation of the planar array of superheated superconductors"],"dc:type":["Text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["master's"],"thesis:degree_name":["Master of Science - MSc"],"thesis:institution_name":["University of British Columbia"]},"updated_at":"2026-07-24T05:07:24Z"}