2026-09-22T04:09:49Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/85924 2023-07-11 col_2142_5131 col_2142_14837 com_2142_5130 com_2142_14836 com_2142_234

Ruzic, David N. Gray, Travis Kelly 2015-09-28T14:51:11Z 2015-09-28T14:51:11Z 10000-01-01 2009 2009 Here, we present experimental verification of substantially reduced target surface temperature with the use of thin lithium films on surface of the target as compared to a bare target. Furthermore, optical measurements are made to determine the density and temperature of the lithium vapor cloud as it expands away from the target surface. A collisional-radiative model for both neutrals and singly ionized lithium is used to model the lithium vapor and is found to correlate well with the optical measurements. The vapor cloud electron temperature is found to vary from 2--3 eV with peak heating occurring 3--5 mm away from the target. While the lithium neutral density is found to fall off exponentially from the surface, the lithium ion density is peaked 5--10 mm away from the target. This suggests an ionization front at this distance from the target where the energy from the incident plasma is primarily absorbed by the lithium vapor. It is estimated that the primary mechanisms for energy deposition into the lithium vapor are due to primary and secondary ionizations of the lithium as well as electron-lithium scattering. The energy absorbed by these processes correlates well with the energy reduction found to the target surface when a lithium coating is present. Made available in DSpace on 2015-09-28T14:51:11Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3392026.pdf: 2394467 bytes, checksum: 02c00bf4b658df97e7a239059594a727 (MD5) Previous issue date: 2009 Embargo set by: Seth Robbins for item 87205 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 159 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009. http://hdl.handle.net/2142/85924 (MiAaPQ)AAI3392026 eng Engineering, Nuclear Bombardment of Thin Lithium Films With Energetic Plasma Flows text Nuclear Engineering Nuclear Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.