Cesium vapor thermionic converter anomalies arising from negative ion emission

Compelling experimental evidence is given that a longstanding limit encountered on cesium vapor thermionic energy converter performance improvement and other anomalies arise from thermionic emission of cesium negative ions. It is shown that the energy that characterizes thermionic emission of cesium...

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Veröffentlicht in:	Journal of applied physics 2016-08, Vol.120 (6)
1. Verfasser:	Rasor, Ned S.
Format:	Artikel
Sprache:	eng
Schlagworte:	ANIONS CESIUM CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIAGRAMS ELECTRIC CONDUCTIVITY ELECTRON EMISSION ELECTRONS INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ION EMISSION LANGMUIR PROBE THERMIONIC CONVERTERS THERMIONIC DIODES THERMIONIC EMISSION VAPORS WORK FUNCTIONS
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container_title	Journal of applied physics
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creator	Rasor, Ned S.
description	Compelling experimental evidence is given that a longstanding limit encountered on cesium vapor thermionic energy converter performance improvement and other anomalies arise from thermionic emission of cesium negative ions. It is shown that the energy that characterizes thermionic emission of cesium negative ions is 1.38 eV and, understandably, is not the electron affinity 0.47 eV determined for the photodetachment threshold of the cesium negative ion. The experimental evidence includes measurements of collector work functions and volt-ampere characteristics in quasi-vacuum cesium vapor thermionic diodes, along with reinterpretation of the classic Taylor-Langmuir S-curve data on electron emission in cesium vapor. The quantitative effects of negative ion emission on performance in the ignited, unignited, and quasi-vacuum modes of cesium vapor thermionic converter operation are estimated.
doi_str_mv	10.1063/1.4960448
format	Article
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It is shown that the energy that characterizes thermionic emission of cesium negative ions is 1.38 eV and, understandably, is not the electron affinity 0.47 eV determined for the photodetachment threshold of the cesium negative ion. The experimental evidence includes measurements of collector work functions and volt-ampere characteristics in quasi-vacuum cesium vapor thermionic diodes, along with reinterpretation of the classic Taylor-Langmuir S-curve data on electron emission in cesium vapor. 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The quantitative effects of negative ion emission on performance in the ignited, unignited, and quasi-vacuum modes of cesium vapor thermionic converter operation are estimated.</description><subject>ANIONS</subject><subject>CESIUM</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>DIAGRAMS</subject><subject>ELECTRIC CONDUCTIVITY</subject><subject>ELECTRON EMISSION</subject><subject>ELECTRONS</subject><subject>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</subject><subject>ION EMISSION</subject><subject>LANGMUIR PROBE</subject><subject>THERMIONIC CONVERTERS</subject><subject>THERMIONIC DIODES</subject><subject>THERMIONIC EMISSION</subject><subject>VAPORS</subject><subject>WORK FUNCTIONS</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNp90E1LAzEQBuAgCtbqwX8Q8KSwNclmNztHKX5B0YueQzadtJHupiTrgv_elBY9CJ5mDg8v7wwhl5zNOKvLWz6TUDMpmyMy4ayBQlUVOyYTxgQvGlBwSs5S-mCM86aECXmZY_KfHR3NNkQ6rDF2PvTeUhv6EeOAkZo-dGbjMVETffL9iroYOtrjygx-RJo9xc6nlJdzcuLMJuHFYU7J-8P92_ypWLw-Ps_vFoUthRoKyZRrhJIgRe6IHBrVIsMl1GA5LqtGKW7AtQzBYlvJujaVAGm5MlI4WZdTcrXPDWnwOlk_oF3nyj3aQQtRgaoBsrreKxtDShGd3kbfmfilOdO7d2muD-_K9mZvd2H5sND_4DHEX6i3S_cf_pv8DTAWeM4</recordid><startdate>20160814</startdate><enddate>20160814</enddate><creator>Rasor, Ned S.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0003-2820-0517</orcidid></search><sort><creationdate>20160814</creationdate><title>Cesium vapor thermionic converter anomalies arising from negative ion emission</title><author>Rasor, Ned S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-407f8274942089e1987be0ed969c1ed58771a9fb0e9ceb5466a5294c17a42f463</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>ANIONS</topic><topic>CESIUM</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>DIAGRAMS</topic><topic>ELECTRIC CONDUCTIVITY</topic><topic>ELECTRON EMISSION</topic><topic>ELECTRONS</topic><topic>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</topic><topic>ION EMISSION</topic><topic>LANGMUIR PROBE</topic><topic>THERMIONIC CONVERTERS</topic><topic>THERMIONIC DIODES</topic><topic>THERMIONIC EMISSION</topic><topic>VAPORS</topic><topic>WORK FUNCTIONS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rasor, Ned S.</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rasor, Ned S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cesium vapor thermionic converter anomalies arising from negative ion emission</atitle><jtitle>Journal of applied physics</jtitle><date>2016-08-14</date><risdate>2016</risdate><volume>120</volume><issue>6</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>Compelling experimental evidence is given that a longstanding limit encountered on cesium vapor thermionic energy converter performance improvement and other anomalies arise from thermionic emission of cesium negative ions. 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subjects	ANIONS CESIUM CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIAGRAMS ELECTRIC CONDUCTIVITY ELECTRON EMISSION ELECTRONS INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ION EMISSION LANGMUIR PROBE THERMIONIC CONVERTERS THERMIONIC DIODES THERMIONIC EMISSION VAPORS WORK FUNCTIONS
title	Cesium vapor thermionic converter anomalies arising from negative ion emission
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