{"id":71,"date":"2018-07-14T19:10:07","date_gmt":"2018-07-14T23:10:07","guid":{"rendered":"http:\/\/sites.nd.edu\/nazli-turan\/?p=71"},"modified":"2021-01-15T14:09:11","modified_gmt":"2021-01-15T18:09:11","slug":"thermal-analysis-and-testing-of-different-designs-of-lanthanum-hexaboride-hollow-cathodes","status":"publish","type":"post","link":"https:\/\/sites.nd.edu\/nazli-turan\/2018\/07\/14\/thermal-analysis-and-testing-of-different-designs-of-lanthanum-hexaboride-hollow-cathodes\/","title":{"rendered":"Thermal Analysis and Testing of Different Designs of Lanthanum Hexaboride Hollow Cathodes"},"content":{"rendered":"<blockquote><p>Electric propulsion systems provide a higher delta-V for the same mass of propellant when compared to chemical propulsion systems due to their higher Isp levels. Many electric propulsion systems utilize cathodes as electron source. Hollow cathodes generate electron current through thermionic emission mechanism. In this study conventional hollow cathode designs are investigated numerically and experimentally. Considering the problems that are encountered with the conventional designs, a new hollow cathode design is developed, which is called coaxial hollow cathode. Operational parameters of the coaxial cathode are investigated experimentally.<\/p><\/blockquote>\n<p><!--more--><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium\" src=\"https:\/\/nazlituranwritings.files.wordpress.com\/2017\/07\/exper2.jpg?w=1462\" width=\"1009\" height=\"364\" \/><\/p>\n<p>You can reach this paper with the following link:<\/p>\n<p><span style=\"text-decoration: underline\"><a href=\"http:\/\/bustlab.boun.edu.tr\/assets\/B38%20-%20RAST_2017_paper_100_SUBMITTED.pdf\">8th International Conference on Recent Advances in Space Technologies (RAST), 19-22 June 2017.<\/a><\/span><\/p>\n<p>Some figures from the paper:<\/p>\n<figure id=\"attachment_395\" aria-describedby=\"caption-attachment-395\" style=\"width: 436px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-395\" src=\"https:\/\/nazlituranwritings.files.wordpress.com\/2017\/07\/cathode.jpg\" alt=\"cathode\" width=\"436\" height=\"536\" \/><figcaption id=\"caption-attachment-395\" class=\"wp-caption-text\">Heat Flux, Top: First conventional heater design, Middle: Second conventional heater design, Bottom: Coaxial hollow cathode design<\/figcaption><\/figure>\n<figure id=\"attachment_400\" aria-describedby=\"caption-attachment-400\" style=\"width: 474px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-400\" src=\"https:\/\/nazlituranwritings.files.wordpress.com\/2017\/07\/cattt.jpg\" alt=\"cattt\" width=\"474\" height=\"503\" \/><figcaption id=\"caption-attachment-400\" class=\"wp-caption-text\">Temperature distribution, Top: First conventional heater design, Middle: Second conventional heater design, Bottom: Coaxial hollow cathode design<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Electric propulsion systems provide a higher delta-V for the same mass of propellant when compared to chemical propulsion systems due to their higher Isp levels. Many electric propulsion systems utilize cathodes as electron source. Hollow cathodes generate electron current through thermionic emission mechanism. In this study conventional hollow cathode designs are investigated numerically and experimentally. [&hellip;]<\/p>\n","protected":false},"author":3115,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24899],"tags":[303404],"class_list":["post-71","post","type-post","status-publish","format-standard","hentry","category-publications","tag-plasma-applications"],"_links":{"self":[{"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/posts\/71","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/users\/3115"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/comments?post=71"}],"version-history":[{"count":2,"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/posts\/71\/revisions"}],"predecessor-version":[{"id":393,"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/posts\/71\/revisions\/393"}],"wp:attachment":[{"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/media?parent=71"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/categories?post=71"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.nd.edu\/nazli-turan\/wp-json\/wp\/v2\/tags?post=71"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}