2026-09-20T12:45:13Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/22796 2023-07-10 col_2142_5131 col_2142_14837 com_2142_5130 com_2142_14836 com_2142_234

Miley, George H. Bennish, Aaron Hersch 2011-05-07T13:51:46Z 2011-05-07T13:51:46Z 10000-01-01 1990 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). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114175.pdf: 5265495 bytes, checksum: 6438006b8cf7dfc324462f499d087f86 (MD5) Previous issue date: 1990 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:00:03Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:28:23-05:00 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 AAI9114175 (UMI)AAI9114175 http://hdl.handle.net/2142/22796 eng Copyright 1990 Bennish, Aaron Hersch Engineering, Nuclear Physics, Radiation Physics, Fluid and Plasma Laser-driven implosion characterization by the analysis of charged-fusion-product energy spectra text Nuclear, Plasma, and Radiological Engineering Nuclear, Plasma, and Radiological Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.