2026-09-20T14:35:48Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/90736 2023-07-11 col_2142_5131 com_2142_5130

Eden, James G. Su, Rui 2016-07-07T20:27:05Z 2016-07-07T20:27:05Z 2018-07-08T09:15:16Z 2016-04-05 2016-05 "Electronic states of helium diners having potential energy > 24 eV and radiative lifetimes as short as 19 ns have been generated in a micro-plasma jet at super-atmospheric pressure and rotationally cooled by supersonic expansion. Spatial-temporal spectrograms of d^3Σ+u→(b^3)π_g (v', v"") = (0, 0) emission are obtained, which contain the information about the dynamic cooling process during the molecular beam expansion. Analysis shows the spatial-temporal evolution of the rotational temperature to be a damped sinusoid that reaches a minimum value of 100 K, which is attributed to the reflection of electrons from a virtual cathode located downstream of the jet nozzle. Data fitting to the damped sinusoid function yields a spatially-averaged electron density of 10^8 cm^(-3). The experimental setup has the potential to be used in exploration of the spectroscopy and plasma dynamics in various gas molecules." Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01 The student, Rui Su, accepted the attached license on 2016-04-04 at 13:18. The student, Rui Su, submitted this Thesis for approval on 2016-04-04 at 13:33. This Thesis was approved for publication on 2016-04-05 at 14:40. DSpace SAF Submission Ingestion Package generated from Vireo submission #9145 on 2016-07-07 at 13:48:50 Made available in DSpace on 2016-07-07T20:27:05Z (GMT). No. of bitstreams: 2 SU-THESIS-2016.pdf: 1330263 bytes, checksum: 1855fc35e52938a88f222f956c9b89df (MD5) LICENSE.txt: 4203 bytes, checksum: 2209ef670402f17dd9f4e5aa51577c6d (MD5) Previous issue date: 2016-04-05 Embargo set by: Seth Robbins for item 93088 Lift date: 2018-07-07T20:28:14Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Embargo set by: Seth Robbins for item 93088 Lift date: 2018-07-07T20:35:34Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 93088 on 2018-07-08T09:15:16Z. application/pdf http://hdl.handle.net/2142/90736 en Copyright 2016 Rui Su microplasma supersonic cooling molecular spectroscopy Supersonic cooling of short-lived molecular states in a pulsed microcavity plasma jet text text Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.