Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux
From pulsed plasma experiments focusing on neutral pressure dependence, the impacts of a transition from a low to a high recycling target on the particle load were investigated and discussed in the linear plasma device, Magnum-PSI. Time traces of the target ion flux were mitigated in high neutral pr...
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| Veröffentlicht in: | Plasma physics and controlled fusion 2022-10, Vol.64 (10), p.105013 |
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| container_title | Plasma physics and controlled fusion |
| container_volume | 64 |
| creator | Hayashi, Yuki Tanaka, Hirohiko Ohno, Noriyasu Kajita, Shin Morgan, Thomas van der Meiden, Hennie Scholten, John Vernimmen, Jordy Natsume, Hiroki Sawada, Keiji Masuda, Shota |
| description | From pulsed plasma experiments focusing on neutral pressure dependence, the impacts of a transition from a low to a high recycling target on the particle load were investigated and discussed in the linear plasma device, Magnum-PSI. Time traces of the target ion flux were mitigated in high neutral pressure cases because of a plasma-neutral interaction. On the other hand, in low neutral-pressure cases, the target ion flux indicated partial suppression in the last part of the pulse. The Langmuir probe, located 200 mm upstream from the target plate, did not exhibit such a suppression. Pulse suppression can be expected from the localized interaction between recycled neutral flux and pulsed plasma in front of the target. The mean-free paths of recycled neutral particles regarding the charge exchange with pulse ions and elastic scattering with background neutral particles were compared. Modeling using a fluid code coupled with a neutral transport code was performed, and it was concluded that dynamic pressure induced by the transient recycled neutral flux caused sufficient momentum loss to stagnate the pulsed plasma toward the target plate. |
| doi_str_mv | 10.1088/1361-6587/ac8acb |
| format | Article |
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Time traces of the target ion flux were mitigated in high neutral pressure cases because of a plasma-neutral interaction. On the other hand, in low neutral-pressure cases, the target ion flux indicated partial suppression in the last part of the pulse. The Langmuir probe, located 200 mm upstream from the target plate, did not exhibit such a suppression. Pulse suppression can be expected from the localized interaction between recycled neutral flux and pulsed plasma in front of the target. The mean-free paths of recycled neutral particles regarding the charge exchange with pulse ions and elastic scattering with background neutral particles were compared. Modeling using a fluid code coupled with a neutral transport code was performed, and it was concluded that dynamic pressure induced by the transient recycled neutral flux caused sufficient momentum loss to stagnate the pulsed plasma toward the target plate.</description><identifier>ISSN: 0741-3335</identifier><identifier>EISSN: 1361-6587</identifier><identifier>DOI: 10.1088/1361-6587/ac8acb</identifier><identifier>CODEN: PLPHBZ</identifier><language>eng</language><publisher>IOP Publishing</publisher><subject>Langmuir probe ; Magnum-PSI ; plasma detachment ; pulse plasma ; recycling</subject><ispartof>Plasma physics and controlled fusion, 2022-10, Vol.64 (10), p.105013</ispartof><rights>2022 IOP Publishing Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c419t-b485e1ee6ebd38c3d8e49b502961562da02e3097c4fe457a9d534f8b9d5944353</cites><orcidid>0000-0002-5585-4279 ; 0000-0001-6090-5010 ; 0000-0002-8025-008X ; 0000-0002-5066-015X ; 0000-0001-7826-0046</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1361-6587/ac8acb/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,780,784,27923,27924,53845,53892</link.rule.ids></links><search><creatorcontrib>Hayashi, Yuki</creatorcontrib><creatorcontrib>Tanaka, Hirohiko</creatorcontrib><creatorcontrib>Ohno, Noriyasu</creatorcontrib><creatorcontrib>Kajita, Shin</creatorcontrib><creatorcontrib>Morgan, Thomas</creatorcontrib><creatorcontrib>van der Meiden, Hennie</creatorcontrib><creatorcontrib>Scholten, John</creatorcontrib><creatorcontrib>Vernimmen, Jordy</creatorcontrib><creatorcontrib>Natsume, Hiroki</creatorcontrib><creatorcontrib>Sawada, Keiji</creatorcontrib><creatorcontrib>Masuda, Shota</creatorcontrib><title>Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux</title><title>Plasma physics and controlled fusion</title><addtitle>PPCF</addtitle><addtitle>Plasma Phys. Control. Fusion</addtitle><description>From pulsed plasma experiments focusing on neutral pressure dependence, the impacts of a transition from a low to a high recycling target on the particle load were investigated and discussed in the linear plasma device, Magnum-PSI. Time traces of the target ion flux were mitigated in high neutral pressure cases because of a plasma-neutral interaction. On the other hand, in low neutral-pressure cases, the target ion flux indicated partial suppression in the last part of the pulse. The Langmuir probe, located 200 mm upstream from the target plate, did not exhibit such a suppression. Pulse suppression can be expected from the localized interaction between recycled neutral flux and pulsed plasma in front of the target. The mean-free paths of recycled neutral particles regarding the charge exchange with pulse ions and elastic scattering with background neutral particles were compared. Modeling using a fluid code coupled with a neutral transport code was performed, and it was concluded that dynamic pressure induced by the transient recycled neutral flux caused sufficient momentum loss to stagnate the pulsed plasma toward the target plate.</description><subject>Langmuir probe</subject><subject>Magnum-PSI</subject><subject>plasma detachment</subject><subject>pulse plasma</subject><subject>recycling</subject><issn>0741-3335</issn><issn>1361-6587</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAUhYMoOD72LrMVrJM0SZsuZfAFA4LoOqTJDWbotCFp0f57M1RciasLh_MdLh9CV5TcUiLlmrKKFpWQ9VobqU17hFa_0TFakZrTgjEmTtFZSjtCKJVltULtK9jJjH7o8eBwmLoEFgcdR286wN2gLf704we2c6_33uAQIaUpAvZ95nK3nfEYdZ889COOYObMWdzDlNMOu276ukAnTufdy597jt4f7t82T8X25fF5c7ctDKfNWLRcCqAAFbSWScOsBN60gpRNRUVVWk1KYKSpDXfARa0bKxh3ss234ZwJdo7IsmvikFIEp0L0ex1nRYk6OFIHIeogRC2OMnKzIH4IajdMsc8P_le__qMegnGq4gsmCGUqWMe-AZPeeLs</recordid><startdate>20221001</startdate><enddate>20221001</enddate><creator>Hayashi, Yuki</creator><creator>Tanaka, Hirohiko</creator><creator>Ohno, Noriyasu</creator><creator>Kajita, Shin</creator><creator>Morgan, Thomas</creator><creator>van der Meiden, Hennie</creator><creator>Scholten, John</creator><creator>Vernimmen, Jordy</creator><creator>Natsume, Hiroki</creator><creator>Sawada, Keiji</creator><creator>Masuda, Shota</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-5585-4279</orcidid><orcidid>https://orcid.org/0000-0001-6090-5010</orcidid><orcidid>https://orcid.org/0000-0002-8025-008X</orcidid><orcidid>https://orcid.org/0000-0002-5066-015X</orcidid><orcidid>https://orcid.org/0000-0001-7826-0046</orcidid></search><sort><creationdate>20221001</creationdate><title>Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux</title><author>Hayashi, Yuki ; Tanaka, Hirohiko ; Ohno, Noriyasu ; Kajita, Shin ; Morgan, Thomas ; van der Meiden, Hennie ; Scholten, John ; Vernimmen, Jordy ; Natsume, Hiroki ; Sawada, Keiji ; Masuda, Shota</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-b485e1ee6ebd38c3d8e49b502961562da02e3097c4fe457a9d534f8b9d5944353</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Langmuir probe</topic><topic>Magnum-PSI</topic><topic>plasma detachment</topic><topic>pulse plasma</topic><topic>recycling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hayashi, Yuki</creatorcontrib><creatorcontrib>Tanaka, Hirohiko</creatorcontrib><creatorcontrib>Ohno, Noriyasu</creatorcontrib><creatorcontrib>Kajita, Shin</creatorcontrib><creatorcontrib>Morgan, Thomas</creatorcontrib><creatorcontrib>van der Meiden, Hennie</creatorcontrib><creatorcontrib>Scholten, John</creatorcontrib><creatorcontrib>Vernimmen, Jordy</creatorcontrib><creatorcontrib>Natsume, Hiroki</creatorcontrib><creatorcontrib>Sawada, Keiji</creatorcontrib><creatorcontrib>Masuda, Shota</creatorcontrib><collection>CrossRef</collection><jtitle>Plasma physics and controlled fusion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hayashi, Yuki</au><au>Tanaka, Hirohiko</au><au>Ohno, Noriyasu</au><au>Kajita, Shin</au><au>Morgan, Thomas</au><au>van der Meiden, Hennie</au><au>Scholten, John</au><au>Vernimmen, Jordy</au><au>Natsume, Hiroki</au><au>Sawada, Keiji</au><au>Masuda, Shota</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux</atitle><jtitle>Plasma physics and controlled fusion</jtitle><stitle>PPCF</stitle><addtitle>Plasma Phys. Control. Fusion</addtitle><date>2022-10-01</date><risdate>2022</risdate><volume>64</volume><issue>10</issue><spage>105013</spage><pages>105013-</pages><issn>0741-3335</issn><eissn>1361-6587</eissn><coden>PLPHBZ</coden><abstract>From pulsed plasma experiments focusing on neutral pressure dependence, the impacts of a transition from a low to a high recycling target on the particle load were investigated and discussed in the linear plasma device, Magnum-PSI. Time traces of the target ion flux were mitigated in high neutral pressure cases because of a plasma-neutral interaction. On the other hand, in low neutral-pressure cases, the target ion flux indicated partial suppression in the last part of the pulse. The Langmuir probe, located 200 mm upstream from the target plate, did not exhibit such a suppression. Pulse suppression can be expected from the localized interaction between recycled neutral flux and pulsed plasma in front of the target. The mean-free paths of recycled neutral particles regarding the charge exchange with pulse ions and elastic scattering with background neutral particles were compared. Modeling using a fluid code coupled with a neutral transport code was performed, and it was concluded that dynamic pressure induced by the transient recycled neutral flux caused sufficient momentum loss to stagnate the pulsed plasma toward the target plate.</abstract><pub>IOP Publishing</pub><doi>10.1088/1361-6587/ac8acb</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-5585-4279</orcidid><orcidid>https://orcid.org/0000-0001-6090-5010</orcidid><orcidid>https://orcid.org/0000-0002-8025-008X</orcidid><orcidid>https://orcid.org/0000-0002-5066-015X</orcidid><orcidid>https://orcid.org/0000-0001-7826-0046</orcidid><oa>free_for_read</oa></addata></record> |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Langmuir probe Magnum-PSI plasma detachment pulse plasma recycling |
| title | Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux |
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