Loading…
A hydrocarbon reaction model for low temperature hydrogen plasmas and an application to the Joint European Torus
A model of collisional processes of hydrocarbons in hydrogen plasmas has been developed to aid in computer modeling efforts relevant to plasma–surface interactions. It includes 16 molecules (CH up to CH 4 , C 2 H to C 2 H 6 , and C 3 H to C 3 H 6 ) and four reaction types (electron impact ionization...
Saved in:
| Published in: | Physics of plasmas 2000-05, Vol.7 (5), p.1421-1432 |
|---|---|
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| 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-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3 |
|---|---|
| cites | cdi_FETCH-LOGICAL-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3 |
| container_end_page | 1432 |
| container_issue | 5 |
| container_start_page | 1421 |
| container_title | Physics of plasmas |
| container_volume | 7 |
| creator | Alman, D. A. Ruzic, D. N. Brooks, J. N. |
| description | A model of collisional processes of hydrocarbons in hydrogen plasmas has been developed to aid in computer modeling efforts relevant to plasma–surface interactions. It includes 16 molecules (CH up to
CH
4
,
C
2
H
to
C
2
H
6
,
and
C
3
H
to
C
3
H
6
)
and four reaction types (electron impact ionization/dissociative ionization, electron impact dissociation, proton impact charge exchange, and dissociative recombination). Experimental reaction rates or cross sections have been compiled, and estimates have been made for cases where these are not available. The proton impact charge exchange reaction rates are calculated from a theoretical model using molecular polarizabilities. Dissociative recombination rates are described by the equation
A/T
B
where parameter A is fit using polarizabilities and B is estimated from known reaction rates. The electron impact ionization and dissociation cross sections are fit to known graphs using four parameters: threshold energy, maximum value of the cross section, energy at the maximum, and a constant for the exponential decay as energy increases. The model has recently been used in an analysis of the Joint European Torus [P. H. Rebut, R. J. Bickerton, and B. E. Keen, Nucl. Fusion 25, 1011 (1985)] MARK II carbon inner divertor using the WBC Monte Carlo impurity transport code. The updated version of WBC, which includes the full set of hydrocarbon reactions, helps to explain an observed asymmetry in carbon deposition near the divertor. |
| doi_str_mv | 10.1063/1.873960 |
| format | article |
| fullrecord | <record><control><sourceid>scitation_cross</sourceid><recordid>TN_cdi_scitation_primary_10_1063_1_873960</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>pop</sourcerecordid><originalsourceid>FETCH-LOGICAL-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3</originalsourceid><addsrcrecordid>eNqd0M1KxDAQB_AgCq6r4CMEvOiha9KkSXpclvWLBS8reAtpkrqVtglJquzb292KD-BhmDn8ZmD-AFxjtMCIkXu8EJyUDJ2AGUaizDjj9PQwc5QxRt_PwUWMnwghygoxA34Jd3sTnFahcj0MVunUjEPnjG1h7QJs3TdMtvM2qDQEO_EP20PfqtipCFVvxoLK-7bR6ridHEw7C19c0ye4HoLzdhRbF4Z4Cc5q1UZ79dvn4O1hvV09ZZvXx-fVcpNpInjKSmpQocoiNxQXFGtWcsNzWuSkMqUxilcYYyvG7wQVPGdGCWMrUlJdGc2LmszBzXTXxdTIqJtk9U67vrc6yRzlmCGCR3U7KR1cjMHW0oemU2EvMZKHPCWWU54jvZvo4dbxzX_ZLxf-nPSmJj-BioRf</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>A hydrocarbon reaction model for low temperature hydrogen plasmas and an application to the Joint European Torus</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>Alman, D. A. ; Ruzic, D. N. ; Brooks, J. N.</creator><creatorcontrib>Alman, D. A. ; Ruzic, D. N. ; Brooks, J. N.</creatorcontrib><description>A model of collisional processes of hydrocarbons in hydrogen plasmas has been developed to aid in computer modeling efforts relevant to plasma–surface interactions. It includes 16 molecules (CH up to
CH
4
,
C
2
H
to
C
2
H
6
,
and
C
3
H
to
C
3
H
6
)
and four reaction types (electron impact ionization/dissociative ionization, electron impact dissociation, proton impact charge exchange, and dissociative recombination). Experimental reaction rates or cross sections have been compiled, and estimates have been made for cases where these are not available. The proton impact charge exchange reaction rates are calculated from a theoretical model using molecular polarizabilities. Dissociative recombination rates are described by the equation
A/T
B
where parameter A is fit using polarizabilities and B is estimated from known reaction rates. The electron impact ionization and dissociation cross sections are fit to known graphs using four parameters: threshold energy, maximum value of the cross section, energy at the maximum, and a constant for the exponential decay as energy increases. The model has recently been used in an analysis of the Joint European Torus [P. H. Rebut, R. J. Bickerton, and B. E. Keen, Nucl. Fusion 25, 1011 (1985)] MARK II carbon inner divertor using the WBC Monte Carlo impurity transport code. The updated version of WBC, which includes the full set of hydrocarbon reactions, helps to explain an observed asymmetry in carbon deposition near the divertor.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/1.873960</identifier><identifier>CODEN: PHPAEN</identifier><language>eng</language><publisher>United States</publisher><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; CROSS SECTIONS ; DISSOCIATION ; ELECTRON-MOLECULE COLLISIONS ; EXPERIMENTAL DATA ; HYDROCARBONS ; IONIZATION ; JET TOKAMAK ; PLASMA CONFINEMENT ; PLASMA DENSITY ; RECOMBINATION ; THEORETICAL DATA</subject><ispartof>Physics of plasmas, 2000-05, Vol.7 (5), p.1421-1432</ispartof><rights>American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3</citedby><cites>FETCH-LOGICAL-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/pop/article-lookup/doi/10.1063/1.873960$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>230,315,786,788,790,801,891,27957,27958,76741</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/20216031$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Alman, D. A.</creatorcontrib><creatorcontrib>Ruzic, D. N.</creatorcontrib><creatorcontrib>Brooks, J. N.</creatorcontrib><title>A hydrocarbon reaction model for low temperature hydrogen plasmas and an application to the Joint European Torus</title><title>Physics of plasmas</title><description>A model of collisional processes of hydrocarbons in hydrogen plasmas has been developed to aid in computer modeling efforts relevant to plasma–surface interactions. It includes 16 molecules (CH up to
CH
4
,
C
2
H
to
C
2
H
6
,
and
C
3
H
to
C
3
H
6
)
and four reaction types (electron impact ionization/dissociative ionization, electron impact dissociation, proton impact charge exchange, and dissociative recombination). Experimental reaction rates or cross sections have been compiled, and estimates have been made for cases where these are not available. The proton impact charge exchange reaction rates are calculated from a theoretical model using molecular polarizabilities. Dissociative recombination rates are described by the equation
A/T
B
where parameter A is fit using polarizabilities and B is estimated from known reaction rates. The electron impact ionization and dissociation cross sections are fit to known graphs using four parameters: threshold energy, maximum value of the cross section, energy at the maximum, and a constant for the exponential decay as energy increases. The model has recently been used in an analysis of the Joint European Torus [P. H. Rebut, R. J. Bickerton, and B. E. Keen, Nucl. Fusion 25, 1011 (1985)] MARK II carbon inner divertor using the WBC Monte Carlo impurity transport code. The updated version of WBC, which includes the full set of hydrocarbon reactions, helps to explain an observed asymmetry in carbon deposition near the divertor.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>CROSS SECTIONS</subject><subject>DISSOCIATION</subject><subject>ELECTRON-MOLECULE COLLISIONS</subject><subject>EXPERIMENTAL DATA</subject><subject>HYDROCARBONS</subject><subject>IONIZATION</subject><subject>JET TOKAMAK</subject><subject>PLASMA CONFINEMENT</subject><subject>PLASMA DENSITY</subject><subject>RECOMBINATION</subject><subject>THEORETICAL DATA</subject><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqd0M1KxDAQB_AgCq6r4CMEvOiha9KkSXpclvWLBS8reAtpkrqVtglJquzb292KD-BhmDn8ZmD-AFxjtMCIkXu8EJyUDJ2AGUaizDjj9PQwc5QxRt_PwUWMnwghygoxA34Jd3sTnFahcj0MVunUjEPnjG1h7QJs3TdMtvM2qDQEO_EP20PfqtipCFVvxoLK-7bR6ridHEw7C19c0ye4HoLzdhRbF4Z4Cc5q1UZ79dvn4O1hvV09ZZvXx-fVcpNpInjKSmpQocoiNxQXFGtWcsNzWuSkMqUxilcYYyvG7wQVPGdGCWMrUlJdGc2LmszBzXTXxdTIqJtk9U67vrc6yRzlmCGCR3U7KR1cjMHW0oemU2EvMZKHPCWWU54jvZvo4dbxzX_ZLxf-nPSmJj-BioRf</recordid><startdate>20000501</startdate><enddate>20000501</enddate><creator>Alman, D. A.</creator><creator>Ruzic, D. N.</creator><creator>Brooks, J. N.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20000501</creationdate><title>A hydrocarbon reaction model for low temperature hydrogen plasmas and an application to the Joint European Torus</title><author>Alman, D. A. ; Ruzic, D. N. ; Brooks, J. N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>CROSS SECTIONS</topic><topic>DISSOCIATION</topic><topic>ELECTRON-MOLECULE COLLISIONS</topic><topic>EXPERIMENTAL DATA</topic><topic>HYDROCARBONS</topic><topic>IONIZATION</topic><topic>JET TOKAMAK</topic><topic>PLASMA CONFINEMENT</topic><topic>PLASMA DENSITY</topic><topic>RECOMBINATION</topic><topic>THEORETICAL DATA</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Alman, D. A.</creatorcontrib><creatorcontrib>Ruzic, D. N.</creatorcontrib><creatorcontrib>Brooks, J. N.</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Alman, D. A.</au><au>Ruzic, D. N.</au><au>Brooks, J. N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A hydrocarbon reaction model for low temperature hydrogen plasmas and an application to the Joint European Torus</atitle><jtitle>Physics of plasmas</jtitle><date>2000-05-01</date><risdate>2000</risdate><volume>7</volume><issue>5</issue><spage>1421</spage><epage>1432</epage><pages>1421-1432</pages><issn>1070-664X</issn><eissn>1089-7674</eissn><coden>PHPAEN</coden><abstract>A model of collisional processes of hydrocarbons in hydrogen plasmas has been developed to aid in computer modeling efforts relevant to plasma–surface interactions. It includes 16 molecules (CH up to
CH
4
,
C
2
H
to
C
2
H
6
,
and
C
3
H
to
C
3
H
6
)
and four reaction types (electron impact ionization/dissociative ionization, electron impact dissociation, proton impact charge exchange, and dissociative recombination). Experimental reaction rates or cross sections have been compiled, and estimates have been made for cases where these are not available. The proton impact charge exchange reaction rates are calculated from a theoretical model using molecular polarizabilities. Dissociative recombination rates are described by the equation
A/T
B
where parameter A is fit using polarizabilities and B is estimated from known reaction rates. The electron impact ionization and dissociation cross sections are fit to known graphs using four parameters: threshold energy, maximum value of the cross section, energy at the maximum, and a constant for the exponential decay as energy increases. The model has recently been used in an analysis of the Joint European Torus [P. H. Rebut, R. J. Bickerton, and B. E. Keen, Nucl. Fusion 25, 1011 (1985)] MARK II carbon inner divertor using the WBC Monte Carlo impurity transport code. The updated version of WBC, which includes the full set of hydrocarbon reactions, helps to explain an observed asymmetry in carbon deposition near the divertor.</abstract><cop>United States</cop><doi>10.1063/1.873960</doi><tpages>12</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1070-664X |
| ispartof | Physics of plasmas, 2000-05, Vol.7 (5), p.1421-1432 |
| issn | 1070-664X 1089-7674 |
| language | eng |
| recordid | cdi_scitation_primary_10_1063_1_873960 |
| 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 CROSS SECTIONS DISSOCIATION ELECTRON-MOLECULE COLLISIONS EXPERIMENTAL DATA HYDROCARBONS IONIZATION JET TOKAMAK PLASMA CONFINEMENT PLASMA DENSITY RECOMBINATION THEORETICAL DATA |
| title | A hydrocarbon reaction model for low temperature hydrogen plasmas and an application to the Joint European Torus |
| url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-09-21T14%3A16%3A24IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-scitation_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=A%20hydrocarbon%20reaction%20model%20for%20low%20temperature%20hydrogen%20plasmas%20and%20an%20application%20to%20the%20Joint%20European%20Torus&rft.jtitle=Physics%20of%20plasmas&rft.au=Alman,%20D.%20A.&rft.date=2000-05-01&rft.volume=7&rft.issue=5&rft.spage=1421&rft.epage=1432&rft.pages=1421-1432&rft.issn=1070-664X&rft.eissn=1089-7674&rft.coden=PHPAEN&rft_id=info:doi/10.1063/1.873960&rft_dat=%3Cscitation_cross%3Epop%3C/scitation_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c387t-94d05a952d41541c697d724523bd9dda7b111e8767848726da8deb394cbdc75f3%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |