{"id":{"repo_id":"moncton","oai_identifier":"oai:umoncton.scholaris.ca:20.500.14658/7020"},"canonical_url":"https://search.dev.ndltd.org/etd/moncton/oai:umoncton.scholaris.ca:20.500.14658/7020","repository":{"repo_id":"moncton","name":"University de Moncton","base_url":"https://umoncton.scholaris.ca/server/oai/request"},"display":{"title":"Thermionic emission from a recrystallized tungsten filament","abstract":"&quot;A projection diode similar to the one developed by Gardner (]6) was constructed to measure the point-by-point thermionic emission parameters of a tungsten single crystal with {110} zone 8° to 10° off filament axis. Pecrystallization of the filament was achieved by the Robinson (27) method of heating treatment. The average &lt;}&gt;* and A* were found to be 4.485 ± 0.055 volts and 49 ± 16 amp per (cm deg)2 respectively. In the various crystallographic directions close to the {110} zone, &lt;f&gt; was 4.80V [110], 4.68V [112], 4.35V [116] and 4.62V [100]. It was evident that the average work function has strong dependence on the low work function patches as predicted by theory. There is strong evidence that a polycrystalline and a single crystal filament have equivalent high and low work function patch distributions.&quot;","abstract_html":"&amp;quot;A projection diode similar to the one developed by Gardner (]6) was constructed to measure the point-by-point thermionic emission parameters of a tungsten single crystal with {110} zone 8° to 10° off filament axis. Pecrystallization of the filament was achieved by the Robinson (27) method of heating treatment. The average &amp;lt;}&amp;gt;* and A* were found to be 4.485 ± 0.055 volts and 49 ± 16 amp per (cm deg)2 respectively. In the various crystallographic directions close to the {110} zone, &amp;lt;f&amp;gt; was 4.80V [110], 4.68V [112], 4.35V [116] and 4.62V [100]. It was evident that the average work function has strong dependence on the low work function patches as predicted by theory. There is strong evidence that a polycrystalline and a single crystal filament have equivalent high and low work function patch distributions.&amp;quot;","abstract_has_math":false,"creators":["Richard, Thomas G."],"institution":"Université de Moncton","degree_name":"Maîtrise ès sciences (physique)","degree_level":"2e cycle","degree_discipline":"Faculté des sciences (1967-1977)","degree_department":null,"school":null,"contributors":[],"advisors":["Girouard, Fernand E."],"committee_chairs":[],"committee_members":[],"year":1969,"date_issued":"1969","date_published":"1969","updated_at":"2026-07-24T03:09:56Z","subjects":["Effet thermoïonique","Tungstène","Traitement thermique"],"languages":["iso639-2b","eng"],"rights":["Author"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 726442515"],"render_values":[{"text":"oclc: 726442515","href":null,"code":true}]},{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["umir:942"],"render_values":[{"text":"umir:942","href":null,"code":true}]}]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14658/7020","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Girouard, Fernand E."]},{"key":"dc:creator","label":"Author","values":["Richard, Thomas G."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2024-12-20T17:57:29Z","2025-05-13T20:23:34Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2024-12-20T17:57:29Z","2025-05-13T20:23:34Z"]},{"key":"dc:date.issued","label":"Date","values":["1969"]},{"key":"dc:publisher","label":"Institution","values":["Université de Moncton"]},{"key":"dc:type","label":"Dc Type","values":["Text","thèse"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Faculté des sciences (1967-1977)"]},{"key":"thesis:degree_level","label":"Degree Level","values":["2e cycle"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Maîtrise ès sciences (physique)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Université de Moncton"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Effet thermoïonique","Tungstène","Traitement thermique"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:language.iso","label":"Language (ISO)","values":["iso639-2b"]},{"key":"dc:rights","label":"Dc Rights","values":["Author"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 726442515"]},{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["umir:942"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14658/7020"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["&quot;A projection diode similar to the one developed by Gardner (]6) was constructed to measure the point-by-point thermionic emission parameters of a tungsten single crystal with {110} zone 8° to 10° off filament axis. Pecrystallization of the filament was achieved by the Robinson (27) method of heating treatment. The average &lt;}&gt;* and A* were found to be 4.485 ± 0.055 volts and 49 ± 16 amp per (cm deg)2 respectively. In the various crystallographic directions close to the {110} zone, &lt;f&gt; was 4.80V [110], 4.68V [112], 4.35V [116] and 4.62V [100]. It was evident that the average work function has strong dependence on the low work function patches as predicted by theory. There is strong evidence that a polycrystalline and a single crystal filament have equivalent high and low work function patch distributions.&quot;"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["electronic"]},{"key":"dc:title","label":"Title","values":["Thermionic emission from a recrystallized tungsten filament"]}]}],"canonical_facts":{"dc:contributor.advisor":["Girouard, Fernand E."],"dc:creator":["Richard, Thomas G."],"dc:date.accessioned":["2024-12-20T17:57:29Z","2025-05-13T20:23:34Z"],"dc:date.available":["2024-12-20T17:57:29Z","2025-05-13T20:23:34Z"],"dc:date.issued":["1969"],"dc:description.abstract":["&quot;A projection diode similar to the one developed by Gardner (]6) was constructed to measure the point-by-point thermionic emission parameters of a tungsten single crystal with {110} zone 8° to 10° off filament axis. Pecrystallization of the filament was achieved by the Robinson (27) method of heating treatment. The average &lt;}&gt;* and A* were found to be 4.485 ± 0.055 volts and 49 ± 16 amp per (cm deg)2 respectively. In the various crystallographic directions close to the {110} zone, &lt;f&gt; was 4.80V [110], 4.68V [112], 4.35V [116] and 4.62V [100]. It was evident that the average work function has strong dependence on the low work function patches as predicted by theory. There is strong evidence that a polycrystalline and a single crystal filament have equivalent high and low work function patch distributions.&quot;"],"dc:format":["application/pdf"],"dc:format.medium":["electronic"],"dc:identifier":["oclc: 726442515"],"dc:identifier.other":["umir:942"],"dc:identifier.uri":["https://hdl.handle.net/20.500.14658/7020"],"dc:language":["eng"],"dc:language.iso":["iso639-2b"],"dc:publisher":["Université de Moncton"],"dc:rights":["Author"],"dc:subject":["Effet thermoïonique","Tungstène","Traitement thermique"],"dc:title":["Thermionic emission from a recrystallized tungsten filament"],"dc:type":["Text","thèse"],"thesis:degree_discipline":["Faculté des sciences (1967-1977)"],"thesis:degree_level":["2e cycle"],"thesis:degree_name":["Maîtrise ès sciences (physique)"],"thesis:institution_name":["Université de Moncton"]},"updated_at":"2026-07-24T03:09:56Z"}