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oai:www.ideals.illinois.edu:2142/42432 2023-07-11 col_2142_5131 col_2142_14837 com_2142_5130 com_2142_14836 com_2142_234

Ruzic, David N. Raman, Priya 2013-02-03T19:45:26Z 2013-02-03T19:45:26Z 2015-02-03T11:00:47Z 2012-12 2013-02-03T19:45:26Z 2012-12 Plasma Facing Component (PFC) materials are crucial to fusion reactor development. There is no one material that functions as an ideal PFC material. As a result, coatings are applied to control the interaction between plasmas and the PFC material. Lithium wall conditioning treatments in the National Spherical Torus Experiment have shown dramatic improvements in plasma performance. In order to understand the complex system of lithiated ATJ graphite, chemical sputtering measurements of plain and lithiated ATJ graphite have been conducted in IIAX (Ion-surface InterAction eXperiment) facility. Chemical sputtering of graphite is dependent on the ion energy and substrate temperature, hence the total effects of treating ATJ graphite with lithium in hydrogen plasma are investigated in terms of different target temperatures and bias voltages. The dominant chemical sputtering product is Methane (CH4). It was found that lithium treatments have suppressed the chemical sputtering of ATJ graphite. The suppression of chemical sputtering effect as function of varying lithium thickness on ATJ graphite has been thoroughly studied. The experimental data suggests that the thickness of the lithium has to be greater than the surface roughness of the ATJ graphite to see substantial suppression in chemical sputtering. Item withdrawn by Alexis Thompson (athmpsn1@illinois.edu) on 2012-12-05T16:35:34Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Raman_Priya.docx: 3077805 bytes, checksum: 3f21cf826c8b65e1fb3505b8f5140d1a (MD5) Raman_Priya.pdf: 1832342 bytes, checksum: 0884e4d9fc23e2d1763bb475e62042d7 (MD5) Made available in DSpace on 2013-02-03T19:45:26Z (GMT). No. of bitstreams: 3 Priya_Raman.pdf: 1832342 bytes, checksum: 0884e4d9fc23e2d1763bb475e62042d7 (MD5) Raman_Priya.docx: 3077805 bytes, checksum: 3f21cf826c8b65e1fb3505b8f5140d1a (MD5) license.txt: 4059 bytes, checksum: 4858fd49745c17c13ecc1495db2ba5fb (MD5) Restriction data tranferred 2014-07-01T11:35:56-05:00 Original Data Group with Access Administrator Release Date: 2015-02-03 13:47:48 UTC Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Item marked as restricted to the 'Administrator' Group (id=1) by Seth Robbins (srobbins@illinois.edu) on 2013-02-03T19:47:49Z Item is restricted until 2015-02-03T19:47:48Z Limited Restriction Lifted for Item 42380 on 2015-02-03T11:00:47Z. http://hdl.handle.net/2142/42432 en Copyright 2012 Priya Raman ATJ graphite Lithium Chemical sputtering Chemical erosion Chemical sputtering studies of lithiated ATJ graphite text Nuclear, Plasma, & Rad Engr 1973 Nuclear, Plasma, Radiolgc Engr 5183 University of Illinois at Urbana-Champaign Thesis M.S. PHD: Nucl, Plasma,Rad Eng-UIUC 10KS5183PHD