Observation of Electron Density Rollover in Hydrogen Plasma Produced with DT-ALPHA Device
The rollover of electron density, a common indicator for the onset of volumetric recombination, was observed in hydrogen plasma, for the first time in the DT-ALPHA. Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with vario...
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| Veröffentlicht in: | Plasma and Fusion Research 2022/06/22, Vol.17, pp.1201082-1201082 |
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| container_title | Plasma and Fusion Research |
| container_volume | 17 |
| creator | YOSHIMURA, Keigo TAKAHASHI, Hiroyuki SEINO, Tomohiro KUSABIRAKI, Kaoru SAKATA, Yuki NISHIMURA, Ryota MATSUYAMA, Akinobu TOBITA, Kenji |
| description | The rollover of electron density, a common indicator for the onset of volumetric recombination, was observed in hydrogen plasma, for the first time in the DT-ALPHA. Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with various conditions regarding the amount of hydrogen secondary gas. A rollover of electron density was observed at the secondary gas feeding position, whereas electron density near the plasma production region remained nearly constant. This behavior indicates an enhancement of hydrogen molecular-activated recombination. |
| doi_str_mv | 10.1585/pfr.17.1201082 |
| format | Article |
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Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with various conditions regarding the amount of hydrogen secondary gas. A rollover of electron density was observed at the secondary gas feeding position, whereas electron density near the plasma production region remained nearly constant. This behavior indicates an enhancement of hydrogen molecular-activated recombination.</description><identifier>ISSN: 1880-6821</identifier><identifier>EISSN: 1880-6821</identifier><identifier>DOI: 10.1585/pfr.17.1201082</identifier><language>eng</language><publisher>Nagoya: The Japan Society of Plasma Science and Nuclear Fusion Research</publisher><subject>divertor ; DT-ALPHA ; Electron density ; Electron energy ; Hydrogen plasma ; molecular-activated recombination ; Position measurement ; radio-frequency plasma ; Rollover</subject><ispartof>Plasma and Fusion Research, 2022/06/22, Vol.17, pp.1201082-1201082</ispartof><rights>2022 by The Japan Society of Plasma Science and Nuclear Fusion Research</rights><rights>Copyright Japan Science and Technology Agency 2022</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c386t-17d6b5d78aee6709d59df0403f1ebb1d7d7e8169988e204e698cbd49557457c13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1883,27924,27925</link.rule.ids></links><search><creatorcontrib>YOSHIMURA, Keigo</creatorcontrib><creatorcontrib>TAKAHASHI, Hiroyuki</creatorcontrib><creatorcontrib>SEINO, Tomohiro</creatorcontrib><creatorcontrib>KUSABIRAKI, Kaoru</creatorcontrib><creatorcontrib>SAKATA, Yuki</creatorcontrib><creatorcontrib>NISHIMURA, Ryota</creatorcontrib><creatorcontrib>MATSUYAMA, Akinobu</creatorcontrib><creatorcontrib>TOBITA, Kenji</creatorcontrib><title>Observation of Electron Density Rollover in Hydrogen Plasma Produced with DT-ALPHA Device</title><title>Plasma and Fusion Research</title><addtitle>Plasma and Fusion Research</addtitle><description>The rollover of electron density, a common indicator for the onset of volumetric recombination, was observed in hydrogen plasma, for the first time in the DT-ALPHA. Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with various conditions regarding the amount of hydrogen secondary gas. A rollover of electron density was observed at the secondary gas feeding position, whereas electron density near the plasma production region remained nearly constant. This behavior indicates an enhancement of hydrogen molecular-activated recombination.</description><subject>divertor</subject><subject>DT-ALPHA</subject><subject>Electron density</subject><subject>Electron energy</subject><subject>Hydrogen plasma</subject><subject>molecular-activated recombination</subject><subject>Position measurement</subject><subject>radio-frequency plasma</subject><subject>Rollover</subject><issn>1880-6821</issn><issn>1880-6821</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNpNkM9LwzAUx4soOKdXzwHPrUnb_OixbOqEwYbMg6eQJq9bR9fMJJvsv7eyOXZ6X3ifz3vwjaJHghNCBX3e1i4hPCEpJlikV9GACIFjJlJyfZFvozvv1xizghI2iL5mlQe3V6GxHbI1emlBB9fnMXS-CQf0YdvW7sGhpkOTg3F2CR2at8pvFJo7a3YaDPppwgqNF3E5nU_KXt03Gu6jm1q1Hh5Ocxh9vr4sRpN4Ont7H5XTWGeChZhwwypquFAAjOPC0MLUOMdZTaCqiOGGgyCsKISAFOfACqErkxeU8pxyTbJh9HS8u3X2ewc-yLXdua5_KVPOWSYwzbKeSo6UdtZ7B7Xcumaj3EESLP_qk319knB5qq8XyqOw9kEt4YwrFxrdwj-OL5zzTq-Uk9BlvxrdeVQ</recordid><startdate>20220622</startdate><enddate>20220622</enddate><creator>YOSHIMURA, Keigo</creator><creator>TAKAHASHI, Hiroyuki</creator><creator>SEINO, Tomohiro</creator><creator>KUSABIRAKI, Kaoru</creator><creator>SAKATA, Yuki</creator><creator>NISHIMURA, Ryota</creator><creator>MATSUYAMA, Akinobu</creator><creator>TOBITA, Kenji</creator><general>The Japan Society of Plasma Science and Nuclear Fusion Research</general><general>Japan Science and Technology Agency</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>7U5</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20220622</creationdate><title>Observation of Electron Density Rollover in Hydrogen Plasma Produced with DT-ALPHA Device</title><author>YOSHIMURA, Keigo ; TAKAHASHI, Hiroyuki ; SEINO, Tomohiro ; KUSABIRAKI, Kaoru ; SAKATA, Yuki ; NISHIMURA, Ryota ; MATSUYAMA, Akinobu ; TOBITA, Kenji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c386t-17d6b5d78aee6709d59df0403f1ebb1d7d7e8169988e204e698cbd49557457c13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>divertor</topic><topic>DT-ALPHA</topic><topic>Electron density</topic><topic>Electron energy</topic><topic>Hydrogen plasma</topic><topic>molecular-activated recombination</topic><topic>Position measurement</topic><topic>radio-frequency plasma</topic><topic>Rollover</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>YOSHIMURA, Keigo</creatorcontrib><creatorcontrib>TAKAHASHI, Hiroyuki</creatorcontrib><creatorcontrib>SEINO, Tomohiro</creatorcontrib><creatorcontrib>KUSABIRAKI, Kaoru</creatorcontrib><creatorcontrib>SAKATA, Yuki</creatorcontrib><creatorcontrib>NISHIMURA, Ryota</creatorcontrib><creatorcontrib>MATSUYAMA, Akinobu</creatorcontrib><creatorcontrib>TOBITA, Kenji</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Plasma and Fusion Research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>YOSHIMURA, Keigo</au><au>TAKAHASHI, Hiroyuki</au><au>SEINO, Tomohiro</au><au>KUSABIRAKI, Kaoru</au><au>SAKATA, Yuki</au><au>NISHIMURA, Ryota</au><au>MATSUYAMA, Akinobu</au><au>TOBITA, Kenji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of Electron Density Rollover in Hydrogen Plasma Produced with DT-ALPHA Device</atitle><jtitle>Plasma and Fusion Research</jtitle><addtitle>Plasma and Fusion Research</addtitle><date>2022-06-22</date><risdate>2022</risdate><volume>17</volume><spage>1201082</spage><epage>1201082</epage><pages>1201082-1201082</pages><issn>1880-6821</issn><eissn>1880-6821</eissn><abstract>The rollover of electron density, a common indicator for the onset of volumetric recombination, was observed in hydrogen plasma, for the first time in the DT-ALPHA. Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with various conditions regarding the amount of hydrogen secondary gas. A rollover of electron density was observed at the secondary gas feeding position, whereas electron density near the plasma production region remained nearly constant. This behavior indicates an enhancement of hydrogen molecular-activated recombination.</abstract><cop>Nagoya</cop><pub>The Japan Society of Plasma Science and Nuclear Fusion Research</pub><doi>10.1585/pfr.17.1201082</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| source | J-STAGE Free; EZB-FREE-00999 freely available EZB journals |
| subjects | divertor DT-ALPHA Electron density Electron energy Hydrogen plasma molecular-activated recombination Position measurement radio-frequency plasma Rollover |
| title | Observation of Electron Density Rollover in Hydrogen Plasma Produced with DT-ALPHA Device |
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