Edge enhancement control in linear arrays of ungated field emitters
In arrays of ungated field emitters, the field enhancement factor of each emitter decreases as the distance between the emitters decreases, an effect known as screening. At the edge of these arrays, emitters experience reduced screening, leading to higher field enhancement factors than emitters at t...
Gespeichert in:
Veröffentlicht in: | Journal of applied physics 2016-01, Vol.119 (4) |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | |
---|---|
container_issue | 4 |
container_start_page | |
container_title | Journal of applied physics |
container_volume | 119 |
creator | Harris, J. R. Jensen, K. L. Shiffler, D. A. |
description | In arrays of ungated field emitters, the field enhancement factor of each emitter decreases as the distance between the emitters decreases, an effect known as screening. At the edge of these arrays, emitters experience reduced screening, leading to higher field enhancement factors than emitters at the array center, causing nonuniform emission across the array. Here, we consider this effect in linear arrays of ungated field emitters spaced at distances comparable to their heights, which is the regime that generally maximizes their average current density. A Line Charge Model is used to assess the degree to which these edge effects propagate into the array interior, and to study the impact of varying the height, location, and tip radius of emitters at the ends of an array on the edge enhancement. It is shown that each of these techniques can accomplish this edge enhancement control, but each has advantages and disadvantages that will be discussed. |
doi_str_mv | 10.1063/1.4940410 |
format | Article |
fullrecord | <record><control><sourceid>proquest_scita</sourceid><recordid>TN_cdi_proquest_journals_2121910459</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2121910459</sourcerecordid><originalsourceid>FETCH-LOGICAL-c397t-4f2eb13c356976f9afb21c2d48c84a58ff5f838ce481fa51326d74692b3c40883</originalsourceid><addsrcrecordid>eNqd0E1LAzEYBOAgCtbqwX8Q8KSwNW8-dpOjlFaFghc9hzSb1JRtUpNU6L-30oJ3T3N5mIFB6BbIBEjLHmHCFSccyBkaAZGq6YQg52hECIVGqk5doqtS1oQASKZGaDrrVw67-GmidRsXK7Yp1pwGHCIeQnQmY5Oz2RecPN7Flamuxz64ocduE2p1uVyjC2-G4m5OOUYf89n79KVZvD2_Tp8WjWWqqw331C2BWSZa1bVeGb-kYGnPpZXcCOm98JJJ67gEbwQw2vYdbxVdMsuJlGyM7o6925y-dq5UvU67HA-TmgIFBYQLdVD3R2VzKiU7r7c5bEzeayD69yMN-vTRwT4cbbGhmhpS_B_-TvkP6m3v2Q_433O7</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2121910459</pqid></control><display><type>article</type><title>Edge enhancement control in linear arrays of ungated field emitters</title><source>AIP Journals Complete</source><source>Alma/SFX Local Collection</source><creator>Harris, J. R. ; Jensen, K. L. ; Shiffler, D. A.</creator><creatorcontrib>Harris, J. R. ; Jensen, K. L. ; Shiffler, D. A.</creatorcontrib><description>In arrays of ungated field emitters, the field enhancement factor of each emitter decreases as the distance between the emitters decreases, an effect known as screening. At the edge of these arrays, emitters experience reduced screening, leading to higher field enhancement factors than emitters at the array center, causing nonuniform emission across the array. Here, we consider this effect in linear arrays of ungated field emitters spaced at distances comparable to their heights, which is the regime that generally maximizes their average current density. A Line Charge Model is used to assess the degree to which these edge effects propagate into the array interior, and to study the impact of varying the height, location, and tip radius of emitters at the ends of an array on the edge enhancement. It is shown that each of these techniques can accomplish this edge enhancement control, but each has advantages and disadvantages that will be discussed.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.4940410</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Charge density ; Edge effect ; Emitters ; Linear arrays ; Screening</subject><ispartof>Journal of applied physics, 2016-01, Vol.119 (4)</ispartof><rights>U.S. Government</rights><rights>2016 U.S. Government</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c397t-4f2eb13c356976f9afb21c2d48c84a58ff5f838ce481fa51326d74692b3c40883</citedby><cites>FETCH-LOGICAL-c397t-4f2eb13c356976f9afb21c2d48c84a58ff5f838ce481fa51326d74692b3c40883</cites><orcidid>0000-0001-8644-1680</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/jap/article-lookup/doi/10.1063/1.4940410$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,780,784,794,4512,27924,27925,76384</link.rule.ids></links><search><creatorcontrib>Harris, J. R.</creatorcontrib><creatorcontrib>Jensen, K. L.</creatorcontrib><creatorcontrib>Shiffler, D. A.</creatorcontrib><title>Edge enhancement control in linear arrays of ungated field emitters</title><title>Journal of applied physics</title><description>In arrays of ungated field emitters, the field enhancement factor of each emitter decreases as the distance between the emitters decreases, an effect known as screening. At the edge of these arrays, emitters experience reduced screening, leading to higher field enhancement factors than emitters at the array center, causing nonuniform emission across the array. Here, we consider this effect in linear arrays of ungated field emitters spaced at distances comparable to their heights, which is the regime that generally maximizes their average current density. A Line Charge Model is used to assess the degree to which these edge effects propagate into the array interior, and to study the impact of varying the height, location, and tip radius of emitters at the ends of an array on the edge enhancement. It is shown that each of these techniques can accomplish this edge enhancement control, but each has advantages and disadvantages that will be discussed.</description><subject>Charge density</subject><subject>Edge effect</subject><subject>Emitters</subject><subject>Linear arrays</subject><subject>Screening</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqd0E1LAzEYBOAgCtbqwX8Q8KSwNW8-dpOjlFaFghc9hzSb1JRtUpNU6L-30oJ3T3N5mIFB6BbIBEjLHmHCFSccyBkaAZGq6YQg52hECIVGqk5doqtS1oQASKZGaDrrVw67-GmidRsXK7Yp1pwGHCIeQnQmY5Oz2RecPN7Flamuxz64ocduE2p1uVyjC2-G4m5OOUYf89n79KVZvD2_Tp8WjWWqqw331C2BWSZa1bVeGb-kYGnPpZXcCOm98JJJ67gEbwQw2vYdbxVdMsuJlGyM7o6925y-dq5UvU67HA-TmgIFBYQLdVD3R2VzKiU7r7c5bEzeayD69yMN-vTRwT4cbbGhmhpS_B_-TvkP6m3v2Q_433O7</recordid><startdate>20160128</startdate><enddate>20160128</enddate><creator>Harris, J. R.</creator><creator>Jensen, K. L.</creator><creator>Shiffler, D. A.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-8644-1680</orcidid></search><sort><creationdate>20160128</creationdate><title>Edge enhancement control in linear arrays of ungated field emitters</title><author>Harris, J. R. ; Jensen, K. L. ; Shiffler, D. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c397t-4f2eb13c356976f9afb21c2d48c84a58ff5f838ce481fa51326d74692b3c40883</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Charge density</topic><topic>Edge effect</topic><topic>Emitters</topic><topic>Linear arrays</topic><topic>Screening</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Harris, J. R.</creatorcontrib><creatorcontrib>Jensen, K. L.</creatorcontrib><creatorcontrib>Shiffler, D. A.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Harris, J. R.</au><au>Jensen, K. L.</au><au>Shiffler, D. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Edge enhancement control in linear arrays of ungated field emitters</atitle><jtitle>Journal of applied physics</jtitle><date>2016-01-28</date><risdate>2016</risdate><volume>119</volume><issue>4</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>In arrays of ungated field emitters, the field enhancement factor of each emitter decreases as the distance between the emitters decreases, an effect known as screening. At the edge of these arrays, emitters experience reduced screening, leading to higher field enhancement factors than emitters at the array center, causing nonuniform emission across the array. Here, we consider this effect in linear arrays of ungated field emitters spaced at distances comparable to their heights, which is the regime that generally maximizes their average current density. A Line Charge Model is used to assess the degree to which these edge effects propagate into the array interior, and to study the impact of varying the height, location, and tip radius of emitters at the ends of an array on the edge enhancement. It is shown that each of these techniques can accomplish this edge enhancement control, but each has advantages and disadvantages that will be discussed.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4940410</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-8644-1680</orcidid></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0021-8979 |
ispartof | Journal of applied physics, 2016-01, Vol.119 (4) |
issn | 0021-8979 1089-7550 |
language | eng |
recordid | cdi_proquest_journals_2121910459 |
source | AIP Journals Complete; Alma/SFX Local Collection |
subjects | Charge density Edge effect Emitters Linear arrays Screening |
title | Edge enhancement control in linear arrays of ungated field emitters |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-26T22%3A05%3A56IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_scita&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Edge%20enhancement%20control%20in%20linear%20arrays%20of%20ungated%20field%20emitters&rft.jtitle=Journal%20of%20applied%20physics&rft.au=Harris,%20J.%20R.&rft.date=2016-01-28&rft.volume=119&rft.issue=4&rft.issn=0021-8979&rft.eissn=1089-7550&rft.coden=JAPIAU&rft_id=info:doi/10.1063/1.4940410&rft_dat=%3Cproquest_scita%3E2121910459%3C/proquest_scita%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2121910459&rft_id=info:pmid/&rfr_iscdi=true |