2026-09-22T23:00:29Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/92855 2023-07-11 col_2142_5131 com_2142_5130

Eden, James Gary Park, Sehyun 2016-11-10T17:55:15Z 2016-11-10T17:55:15Z 2016-07-18 2016-08 Experiments will be described in which the extinction of 10.6 μm photons by free electrons in a single filamentary discharge is studied. The extinction ranges from 3 to 10 percent over a path length of 1 cm, depending on the argon flow rate. The spatio-temporally averaged electron density in the filament is more than 10^15 cm^(-3), as determined by Stark broadening of the hydrogen alpha (656.28 nm) and 4p'[1/2]-4s[3/2]^0 argon I (696.54 nm) lines. Experiments indicate that the observed extinction of 10.6 μm is attributable to a combination of inverse bremsstrahlung and a negative lens effect, and the results will be compared to theoretical calculations based on Boltzmann's equation. The potential application of such high electron density plasmas to studies of fundamental plasma phenomena, as well as optical applications, will be discussed. Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-11-09 without embargo terms The student, Sehyun Park, accepted the attached license on 2016-07-15 at 16:04. The student, Sehyun Park, submitted this Thesis for approval on 2016-07-15 at 16:17. This Thesis was approved for publication on 2016-07-18 at 10:12. DSpace SAF Submission Ingestion Package generated from Vireo submission #9971 on 2016-11-09 at 10:25:16 Made available in DSpace on 2016-11-10T17:55:15Z (GMT). No. of bitstreams: 2 PARK-THESIS-2016.pdf: 1172153 bytes, checksum: 9f34c00212b7c83bfb9236f661a52c95 (MD5) LICENSE.txt: 4208 bytes, checksum: affe59f67959cbd2f355a3e83a57dae0 (MD5) Previous issue date: 2016-07-18 application/pdf http://hdl.handle.net/2142/92855 en Copyright 2016 Sehyun Park Inverse Bremsstrahlung Negative lens effect Stark Broadening Extinction of 10.6 μm laser radiation by free electrons in an argon discharge at atmospheric pressure text text Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.