Effect of filament supports on emissive probe measurements

We have constructed an emissive probe with a thin tungsten filament spot-welded across two nickel wires insulated with ceramic paint. We show that the ceramic supports covering the nickel wires have a large effect on the potential measurements in low-density plasmas. It is found that the potential m...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2013-01, Vol.84 (1), p.013506-013506
Main Authors: Wang, X., Howes, C. T., Horányi, M., Robertson, S.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CERAMICS
DEBYE LENGTH
Emissivity
FILAMENTS
LANGMUIR PROBE
NICKEL
PLASMA DENSITY
PLASMA POTENTIAL
Plasma potentials
PLASMA SHEATH
Plasmas
TUNGSTEN
Wire
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3
cites cdi_FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3
container_end_page 013506
container_issue 1
container_start_page 013506
container_title Review of scientific instruments
container_volume 84
creator Wang, X.
Howes, C. T.
Horányi, M.
Robertson, S.
description We have constructed an emissive probe with a thin tungsten filament spot-welded across two nickel wires insulated with ceramic paint. We show that the ceramic supports covering the nickel wires have a large effect on the potential measurements in low-density plasmas. It is found that the potential measured by the emissive probe is more negative than the potential derived from a Langmuir probe current-voltage (I-V) characteristic curve when the plasma density is so low that the emitting filament remains immersed in the sheaths of the ceramic supports. The length of the filament L needs to be larger than about 2 Debye lengths (L > 2λ De ) in order to avoid the influence of the ceramic supports and to achieve reliable plasma potential measurements using emissive probes.
doi_str_mv 10.1063/1.4776201
format article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1429865041</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1429865041</sourcerecordid><originalsourceid>FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3</originalsourceid><addsrcrecordid>eNqF0MtKxDAUBuAgio6XhS8gBTcqdMxpkiZxJ8N4AcGNrkMmPcHKtKlNK_j2ZphRF4JmEwIff_5zCDkGOgVaskuYcinLgsIWmQBVOk8Ptk0mlDKel5KrPbIf4ytNRwDskr2CMSVLrifkau49uiELPvP10jbYDlkcuy70Q8xCm2FTx1i_Y9b1YYFZgzaOPa5YPCQ73i4jHm3uA_J8M3-a3eUPj7f3s-uH3HEoh9wDUMkZaqfBo5DCS15VylWSCbFApzQTVHpmF45acJ4pqjxUWpRaWcstOyCn69wQh9pEVw_oXlxo29TbFAVQwYRM6mytUtG3EeNgUnOHy6VtMYzRAC-0KgXl8D9loKiWJdBEz9fU9SHGHr3p-rqx_YcBala7N2A2u0_2ZBM7LhqsvuXXshO4WIPVDHaoQ_tt3kP_k2S6yv-Ff3_9Cc3FmJM</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1318097610</pqid></control><display><type>article</type><title>Effect of filament supports on emissive probe measurements</title><source>American Institute of Physics (AIP) Publications</source><source>American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)</source><creator>Wang, X. ; Howes, C. T. ; Horányi, M. ; Robertson, S.</creator><creatorcontrib>Wang, X. ; Howes, C. T. ; Horányi, M. ; Robertson, S.</creatorcontrib><description>We have constructed an emissive probe with a thin tungsten filament spot-welded across two nickel wires insulated with ceramic paint. We show that the ceramic supports covering the nickel wires have a large effect on the potential measurements in low-density plasmas. It is found that the potential measured by the emissive probe is more negative than the potential derived from a Langmuir probe current-voltage (I-V) characteristic curve when the plasma density is so low that the emitting filament remains immersed in the sheaths of the ceramic supports. The length of the filament L needs to be larger than about 2 Debye lengths (L &gt; 2λ De ) in order to avoid the influence of the ceramic supports and to achieve reliable plasma potential measurements using emissive probes.</description><identifier>ISSN: 0034-6748</identifier><identifier>EISSN: 1089-7623</identifier><identifier>DOI: 10.1063/1.4776201</identifier><identifier>PMID: 23387649</identifier><identifier>CODEN: RSINAK</identifier><language>eng</language><publisher>United States</publisher><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; CERAMICS ; DEBYE LENGTH ; Emissivity ; FILAMENTS ; LANGMUIR PROBE ; NICKEL ; PLASMA DENSITY ; PLASMA POTENTIAL ; Plasma potentials ; PLASMA SHEATH ; Plasmas ; TUNGSTEN ; Wire</subject><ispartof>Review of scientific instruments, 2013-01, Vol.84 (1), p.013506-013506</ispartof><rights>American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3</citedby><cites>FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/rsi/article-lookup/doi/10.1063/1.4776201$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>230,314,780,782,784,795,885,27922,27923,76153</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23387649$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/22105357$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Wang, X.</creatorcontrib><creatorcontrib>Howes, C. T.</creatorcontrib><creatorcontrib>Horányi, M.</creatorcontrib><creatorcontrib>Robertson, S.</creatorcontrib><title>Effect of filament supports on emissive probe measurements</title><title>Review of scientific instruments</title><addtitle>Rev Sci Instrum</addtitle><description>We have constructed an emissive probe with a thin tungsten filament spot-welded across two nickel wires insulated with ceramic paint. We show that the ceramic supports covering the nickel wires have a large effect on the potential measurements in low-density plasmas. It is found that the potential measured by the emissive probe is more negative than the potential derived from a Langmuir probe current-voltage (I-V) characteristic curve when the plasma density is so low that the emitting filament remains immersed in the sheaths of the ceramic supports. The length of the filament L needs to be larger than about 2 Debye lengths (L &gt; 2λ De ) in order to avoid the influence of the ceramic supports and to achieve reliable plasma potential measurements using emissive probes.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>CERAMICS</subject><subject>DEBYE LENGTH</subject><subject>Emissivity</subject><subject>FILAMENTS</subject><subject>LANGMUIR PROBE</subject><subject>NICKEL</subject><subject>PLASMA DENSITY</subject><subject>PLASMA POTENTIAL</subject><subject>Plasma potentials</subject><subject>PLASMA SHEATH</subject><subject>Plasmas</subject><subject>TUNGSTEN</subject><subject>Wire</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqF0MtKxDAUBuAgio6XhS8gBTcqdMxpkiZxJ8N4AcGNrkMmPcHKtKlNK_j2ZphRF4JmEwIff_5zCDkGOgVaskuYcinLgsIWmQBVOk8Ptk0mlDKel5KrPbIf4ytNRwDskr2CMSVLrifkau49uiELPvP10jbYDlkcuy70Q8xCm2FTx1i_Y9b1YYFZgzaOPa5YPCQ73i4jHm3uA_J8M3-a3eUPj7f3s-uH3HEoh9wDUMkZaqfBo5DCS15VylWSCbFApzQTVHpmF45acJ4pqjxUWpRaWcstOyCn69wQh9pEVw_oXlxo29TbFAVQwYRM6mytUtG3EeNgUnOHy6VtMYzRAC-0KgXl8D9loKiWJdBEz9fU9SHGHr3p-rqx_YcBala7N2A2u0_2ZBM7LhqsvuXXshO4WIPVDHaoQ_tt3kP_k2S6yv-Ff3_9Cc3FmJM</recordid><startdate>20130101</startdate><enddate>20130101</enddate><creator>Wang, X.</creator><creator>Howes, C. T.</creator><creator>Horányi, M.</creator><creator>Robertson, S.</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7QQ</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20130101</creationdate><title>Effect of filament supports on emissive probe measurements</title><author>Wang, X. ; Howes, C. T. ; Horányi, M. ; Robertson, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>CERAMICS</topic><topic>DEBYE LENGTH</topic><topic>Emissivity</topic><topic>FILAMENTS</topic><topic>LANGMUIR PROBE</topic><topic>NICKEL</topic><topic>PLASMA DENSITY</topic><topic>PLASMA POTENTIAL</topic><topic>Plasma potentials</topic><topic>PLASMA SHEATH</topic><topic>Plasmas</topic><topic>TUNGSTEN</topic><topic>Wire</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, X.</creatorcontrib><creatorcontrib>Howes, C. T.</creatorcontrib><creatorcontrib>Horányi, M.</creatorcontrib><creatorcontrib>Robertson, S.</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Ceramic Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Review of scientific instruments</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, X.</au><au>Howes, C. T.</au><au>Horányi, M.</au><au>Robertson, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of filament supports on emissive probe measurements</atitle><jtitle>Review of scientific instruments</jtitle><addtitle>Rev Sci Instrum</addtitle><date>2013-01-01</date><risdate>2013</risdate><volume>84</volume><issue>1</issue><spage>013506</spage><epage>013506</epage><pages>013506-013506</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>We have constructed an emissive probe with a thin tungsten filament spot-welded across two nickel wires insulated with ceramic paint. We show that the ceramic supports covering the nickel wires have a large effect on the potential measurements in low-density plasmas. It is found that the potential measured by the emissive probe is more negative than the potential derived from a Langmuir probe current-voltage (I-V) characteristic curve when the plasma density is so low that the emitting filament remains immersed in the sheaths of the ceramic supports. The length of the filament L needs to be larger than about 2 Debye lengths (L &gt; 2λ De ) in order to avoid the influence of the ceramic supports and to achieve reliable plasma potential measurements using emissive probes.</abstract><cop>United States</cop><pmid>23387649</pmid><doi>10.1063/1.4776201</doi><tpages>3</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0034-6748
ispartof Review of scientific instruments, 2013-01, Vol.84 (1), p.013506-013506
issn 0034-6748
1089-7623
language eng
recordid cdi_proquest_miscellaneous_1429865041
source American Institute of Physics (AIP) Publications; American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CERAMICS
DEBYE LENGTH
Emissivity
FILAMENTS
LANGMUIR PROBE
NICKEL
PLASMA DENSITY
PLASMA POTENTIAL
Plasma potentials
PLASMA SHEATH
Plasmas
TUNGSTEN
Wire
title Effect of filament supports on emissive probe measurements
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-14T12%3A15%3A50IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Effect%20of%20filament%20supports%20on%20emissive%20probe%20measurements&rft.jtitle=Review%20of%20scientific%20instruments&rft.au=Wang,%20X.&rft.date=2013-01-01&rft.volume=84&rft.issue=1&rft.spage=013506&rft.epage=013506&rft.pages=013506-013506&rft.issn=0034-6748&rft.eissn=1089-7623&rft.coden=RSINAK&rft_id=info:doi/10.1063/1.4776201&rft_dat=%3Cproquest_cross%3E1429865041%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c416t-f110743e9c91fe575f74dd8cd7355bec893507f3abc0a1cf3808f1d95698aa4a3%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1318097610&rft_id=info:pmid/23387649&rfr_iscdi=true