{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/22796"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/22796","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Laser-driven implosion characterization by the analysis of charged-fusion-product energy spectra","abstract":"Energy spectra of charged-fusion products escaping laser-imploded deuterium-tritium filled glass microballoon targets were measured with a time-of-flight (TOF) spectrometer. The TOF spectrometer was carefully designed, constructed and calibrated to simultaneously measure alpha-particles and protons.","abstract_html":"Energy spectra of charged-fusion products escaping laser-imploded deuterium-tritium filled glass microballoon targets were measured with a time-of-flight (TOF) spectrometer. The TOF spectrometer was carefully designed, constructed and calibrated to simultaneously measure alpha-particles and protons.","abstract_has_math":false,"creators":["Bennish, Aaron Hersch"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Nuclear, Plasma, and Radiological Engineering","degree_department":null,"school":null,"contributors":["Miley, George H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:51:46Z","date_published":"2011-05-07T13:51:46Z","updated_at":"2026-07-22T22:25:20Z","subjects":["Engineering, Nuclear","Physics, Radiation","Physics, Fluid and Plasma"],"languages":["eng"],"rights":["Copyright 1990 Bennish, Aaron Hersch"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9114175","(UMI)AAI9114175"],"render_values":[{"text":"AAI9114175","href":null,"code":true},{"text":"(UMI)AAI9114175","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/22796","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Miley, George H."]},{"key":"dc:creator","label":"Author","values":["Bennish, Aaron Hersch"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:51:46Z","10000-01-01","1990"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nuclear, Plasma, and Radiological 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":["Engineering, Nuclear","Physics, Radiation","Physics, Fluid and Plasma"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1990 Bennish, Aaron Hersch"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9114175","(UMI)AAI9114175","http://hdl.handle.net/2142/22796"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Energy spectra of charged-fusion products escaping laser-imploded deuterium-tritium filled glass microballoon targets were measured with a time-of-flight (TOF) spectrometer. The TOF spectrometer was carefully designed, constructed and calibrated to simultaneously measure alpha-particles and protons.","Experiments were performed using the 24-beam Omega Laser System at the Laboratory for Laser Energetics at the University of Rochester. For the first series of experiments, a short laser pulse of about 100 ps was used, so that the targets behaved in the exploding pusher mode. Both the alpha-particle and proton spectra were obtained from over twenty experiments. These results were used to study four slowing-down theories. It was found that, within the experimental accuracy, the classical slowing-down theories adequately describe the results. For the second series of experiments, a long laser pulse of about 900 ps was used, so that the target implosion was more ablative. Only the protons escaped the target. The proton spectra of five experiments were analyzed and gave evidence of thermonuclear yield at both the time of shock heating and at the time of maximum compression. The analysis of these proton spectra provides the first conclusive proof of significant compression yields in these targets, where approximately half of the yield occurs during the compression phase. The LILAC computer code, which was developed at LLE, was extensively used to simulate both series of experiments.","Made available in DSpace on 2011-05-07T13:51:46Z (GMT). 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The TOF spectrometer was carefully designed, constructed and calibrated to simultaneously measure alpha-particles and protons.","Experiments were performed using the 24-beam Omega Laser System at the Laboratory for Laser Energetics at the University of Rochester. For the first series of experiments, a short laser pulse of about 100 ps was used, so that the targets behaved in the exploding pusher mode. Both the alpha-particle and proton spectra were obtained from over twenty experiments. These results were used to study four slowing-down theories. It was found that, within the experimental accuracy, the classical slowing-down theories adequately describe the results. For the second series of experiments, a long laser pulse of about 900 ps was used, so that the target implosion was more ablative. Only the protons escaped the target. The proton spectra of five experiments were analyzed and gave evidence of thermonuclear yield at both the time of shock heating and at the time of maximum compression. The analysis of these proton spectra provides the first conclusive proof of significant compression yields in these targets, where approximately half of the yield occurs during the compression phase. The LILAC computer code, which was developed at LLE, was extensively used to simulate both series of experiments.","Made available in DSpace on 2011-05-07T13:51:46Z (GMT). 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