{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/54465"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/54465","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Studies of plasma potential measurements using an ion-sensistive probe","abstract":"The plasma potential of the scrape-off-layer (SOL) in the tokamak is a key indicator of the erosion rate of the plasma facing component (PFC) material. The Alcator C-Mod SOL plasma potential is currently measured by emissive probes, which is an established potential diagnostic, yet the probes are fragile and short-lived. The ion-sensitive probe (ISP) is a possible sturdier replacement for the emissive probe. Plasma potentials in the Dionisos plasma chamber (DPC) are compared between the two probe types. Preliminary results show the DPC electron density in helicon mode was found to imitate that of the C-Mod plasma SOL. The ISP plasma potential followed the same trend as the emissive probe plasma potential with RF power level, and the two potentials were always within the error of one another. These results indicated the ISP appears to be appropriate for use in C-Mod.","abstract_html":"The plasma potential of the scrape-off-layer (SOL) in the tokamak is a key indicator of the erosion rate of the plasma facing component (PFC) material. The Alcator C-Mod SOL plasma potential is currently measured by emissive probes, which is an established potential diagnostic, yet the probes are fragile and short-lived. The ion-sensitive probe (ISP) is a possible sturdier replacement for the emissive probe. Plasma potentials in the Dionisos plasma chamber (DPC) are compared between the two probe types. Preliminary results show the DPC electron density in helicon mode was found to imitate that of the C-Mod plasma SOL. The ISP plasma potential followed the same trend as the emissive probe plasma potential with RF power level, and the two potentials were always within the error of one another. These results indicated the ISP appears to be appropriate for use in C-Mod.","abstract_has_math":false,"creators":["Thome, Kathreen Elizabeth"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering.","school":null,"contributors":[],"advisors":["Dennis Whyte."],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009","date_published":"2009","updated_at":"2026-07-22T22:21:11Z","subjects":["Nuclear Science and Engineering."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/54465","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Dennis Whyte."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering."]},{"key":"dc:creator","label":"Author","values":["Thome, Kathreen Elizabeth"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2010-04-28T15:36:36Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2010-04-28T15:36:36Z"]},{"key":"dc:date.issued","label":"Date","values":["2009"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Nuclear Science and Engineering."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/54465"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2009.","\"June 2009.\" Cataloged from PDF version of thesis.","Includes bibliographical references (p. 38)."]},{"key":"dc:description.abstract","label":"Abstract","values":["The plasma potential of the scrape-off-layer (SOL) in the tokamak is a key indicator of the erosion rate of the plasma facing component (PFC) material. The Alcator C-Mod SOL plasma potential is currently measured by emissive probes, which is an established potential diagnostic, yet the probes are fragile and short-lived. The ion-sensitive probe (ISP) is a possible sturdier replacement for the emissive probe. Plasma potentials in the Dionisos plasma chamber (DPC) are compared between the two probe types. Preliminary results show the DPC electron density in helicon mode was found to imitate that of the C-Mod plasma SOL. The ISP plasma potential followed the same trend as the emissive probe plasma potential with RF power level, and the two potentials were always within the error of one another. These results indicated the ISP appears to be appropriate for use in C-Mod."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.B."]},{"key":"dc:title","label":"Title","values":["Studies of plasma potential measurements using an ion-sensistive probe"]}]}],"canonical_facts":{"dc:contributor.advisor":["Dennis Whyte."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering."],"dc:contributor.other":["Massachusetts Institute of Technology. Dept. of Nuclear Science and Engineering."],"dc:creator":["Thome, Kathreen Elizabeth"],"dc:date.accessioned":["2010-04-28T15:36:36Z"],"dc:date.available":["2010-04-28T15:36:36Z"],"dc:date.issued":["2009"],"dc:description":["Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2009.","\"June 2009.\" Cataloged from PDF version of thesis.","Includes bibliographical references (p. 38)."],"dc:description.abstract":["The plasma potential of the scrape-off-layer (SOL) in the tokamak is a key indicator of the erosion rate of the plasma facing component (PFC) material. The Alcator C-Mod SOL plasma potential is currently measured by emissive probes, which is an established potential diagnostic, yet the probes are fragile and short-lived. The ion-sensitive probe (ISP) is a possible sturdier replacement for the emissive probe. Plasma potentials in the Dionisos plasma chamber (DPC) are compared between the two probe types. Preliminary results show the DPC electron density in helicon mode was found to imitate that of the C-Mod plasma SOL. The ISP plasma potential followed the same trend as the emissive probe plasma potential with RF power level, and the two potentials were always within the error of one another. These results indicated the ISP appears to be appropriate for use in C-Mod."],"dc:description.degree":["S.B."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/54465"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Nuclear Science and Engineering."],"dc:title":["Studies of plasma potential measurements using an ion-sensistive probe"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:21:11Z"}