Understanding JET-C quiescent phases with edge harmonic magnetohydrodynamic activity and comparison with behaviour under ITER-like wall conditioning
An analysis of edge localised mode-free (quiescent) H-mode discharges exhibiting edge harmonic magnetoydrodynamic activity in the JET-carbon wall machine is presented. It is observed that the otherwise quiescent pulses with multiple- n harmonic oscillations are sustained until a threshold in pedesta...
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| Veröffentlicht in: | Plasma physics and controlled fusion 2022-04, Vol.64 (4), p.44005 |
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| creator | Brunetti, D Ham, C J Graves, J P Lazzaro, E Nowak, S Mariani, A Wahlberg, C Cooper, W A Solano, E R Saarelma, S Frassinetti, L Fontana, M Kleiner, A Bustos Ramirez, G Viezzer, E |
| description | An analysis of edge localised mode-free (quiescent) H-mode discharges exhibiting edge harmonic magnetoydrodynamic activity in the JET-carbon wall machine is presented. It is observed that the otherwise quiescent pulses with multiple-
n
harmonic oscillations are sustained until a threshold in pedestal electron density and collisionality is crossed. The macroscopic pedestal parameters associated with the quiescent phase are compared with those of a database of JET-ELMy discharges with both carbon and ITER-like wall (ILW). This comparison provides the identification of the existence regions in the relevant pedestal and global plasma parameters for edge harmonic oscillations (EHOs) in JET plasmas. Although the ELMy database scans pedestal collisionality and
β
values typical of ET-carbon quiescent operation, shaping and current are not simultaneously compatible with EHO existence. Nevertheless, ILW operation with JET-carbon quiescent-like parameters could in principle be achieved, and improved pedestal performance could be observed in more recent JET-ILW pulses. |
| doi_str_mv | 10.1088/1361-6587/ac4d3a |
| format | Article |
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n
harmonic oscillations are sustained until a threshold in pedestal electron density and collisionality is crossed. The macroscopic pedestal parameters associated with the quiescent phase are compared with those of a database of JET-ELMy discharges with both carbon and ITER-like wall (ILW). This comparison provides the identification of the existence regions in the relevant pedestal and global plasma parameters for edge harmonic oscillations (EHOs) in JET plasmas. Although the ELMy database scans pedestal collisionality and
β
values typical of ET-carbon quiescent operation, shaping and current are not simultaneously compatible with EHO existence. Nevertheless, ILW operation with JET-carbon quiescent-like parameters could in principle be achieved, and improved pedestal performance could be observed in more recent JET-ILW pulses.</description><identifier>ISSN: 0741-3335</identifier><identifier>ISSN: 1361-6587</identifier><identifier>EISSN: 1361-6587</identifier><identifier>DOI: 10.1088/1361-6587/ac4d3a</identifier><identifier>CODEN: PLPHBZ</identifier><language>eng</language><publisher>United States: IOP Publishing</publisher><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; EHO ; ELMs ; JET ; QH-mode ; tokamak</subject><ispartof>Plasma physics and controlled fusion, 2022-04, Vol.64 (4), p.44005</ispartof><rights>2022 Crown copyright. Reproduced with the permission of the Controller of Her Majesty’s Stationery Office.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c377t-8f764a74d06ccff6e38ff1174502334e06d0778ae5d4d2d2700c50a583a1e0333</cites><orcidid>0000-0001-8650-3271 ; 0000-0001-9190-8310 ; 0000-0002-7959-7959 ; 0000-0002-8817-5344 ; 0000-0002-7979-7483 ; 0000-0001-6419-6848 ; 0000-0003-4680-9190 ; 0000-0003-0476-3825 ; 0000-0003-1989-1926 ; 0000-0002-3291-8890 ; 0000-0002-5800-8027 ; 0000-0002-9546-4494 ; 0000-0002-4815-3407 ; 0000000248153407 ; 0000000164196848 ; 0000000191908310 ; 0000000258008027 ; 0000000279597959 ; 0000000279797483 ; 0000000346809190 ; 0000000295464494 ; 0000000304763825 ; 0000000319891926 ; 0000000232918890 ; 0000000288175344 ; 0000000186503271</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/ac4d3a/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>230,314,552,780,784,885,27924,27925,53846,53893</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/1869956$$D View this record in Osti.gov$$Hfree_for_read</backlink><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-331440$$DView record from Swedish Publication Index$$Hfree_for_read</backlink><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-512739$$DView record from Swedish Publication Index$$Hfree_for_read</backlink></links><search><creatorcontrib>Brunetti, D</creatorcontrib><creatorcontrib>Ham, C J</creatorcontrib><creatorcontrib>Graves, J P</creatorcontrib><creatorcontrib>Lazzaro, E</creatorcontrib><creatorcontrib>Nowak, S</creatorcontrib><creatorcontrib>Mariani, A</creatorcontrib><creatorcontrib>Wahlberg, C</creatorcontrib><creatorcontrib>Cooper, W A</creatorcontrib><creatorcontrib>Solano, E R</creatorcontrib><creatorcontrib>Saarelma, S</creatorcontrib><creatorcontrib>Frassinetti, L</creatorcontrib><creatorcontrib>Fontana, M</creatorcontrib><creatorcontrib>Kleiner, A</creatorcontrib><creatorcontrib>Bustos Ramirez, G</creatorcontrib><creatorcontrib>Viezzer, E</creatorcontrib><creatorcontrib>Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)</creatorcontrib><title>Understanding JET-C quiescent phases with edge harmonic magnetohydrodynamic activity and comparison with behaviour under ITER-like wall conditioning</title><title>Plasma physics and controlled fusion</title><addtitle>PPCF</addtitle><addtitle>Plasma Phys. Control. Fusion</addtitle><description>An analysis of edge localised mode-free (quiescent) H-mode discharges exhibiting edge harmonic magnetoydrodynamic activity in the JET-carbon wall machine is presented. It is observed that the otherwise quiescent pulses with multiple-
n
harmonic oscillations are sustained until a threshold in pedestal electron density and collisionality is crossed. The macroscopic pedestal parameters associated with the quiescent phase are compared with those of a database of JET-ELMy discharges with both carbon and ITER-like wall (ILW). This comparison provides the identification of the existence regions in the relevant pedestal and global plasma parameters for edge harmonic oscillations (EHOs) in JET plasmas. Although the ELMy database scans pedestal collisionality and
β
values typical of ET-carbon quiescent operation, shaping and current are not simultaneously compatible with EHO existence. Nevertheless, ILW operation with JET-carbon quiescent-like parameters could in principle be achieved, and improved pedestal performance could be observed in more recent JET-ILW pulses.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>EHO</subject><subject>ELMs</subject><subject>JET</subject><subject>QH-mode</subject><subject>tokamak</subject><issn>0741-3335</issn><issn>1361-6587</issn><issn>1361-6587</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>D8T</sourceid><recordid>eNqFkUFv1DAQhS0EEkvpnaPFmbR2nNjeY7UsUFQJCW17taa2k7jd2MF2utr_0R-MV0HlhDiNNPrmzcx7CH2g5IISKS8p47TirRSXoBvD4BVavbReoxURDa0YY-1b9C6lB0IolTVfoedbb2xMGbxxvsfft7tqg3_NziZtfcbTAMkmfHB5wNb0Fg8Qx-CdxiP03uYwHE0M5uhhLD3Q2T25fMRFDeswThBdCn4Zv7cDPLkwRzyfVuLr3fZntXePFh9gvy94uSC7ou379-hNB_tkz__UM3T7ZbvbfKtufny93lzdVJoJkSvZCd6AaAzhWncdt0x2HaWiaUnNWGMJN0QICbY1jalNLQjRLYFWMqCWFDPO0KdFNx3sNN-rKboR4lEFcOqzu7tSIfZqnlVLa8HWBa_-jz_mQTFGm4YU_uPCh5SdStplq4fyp7c6Kyr5et3yApEF0jGkFG33IkuJOiWrTjGqU4xqSfbv2S5M6qE46otJ_8Z_AyWEqEQ</recordid><startdate>20220401</startdate><enddate>20220401</enddate><creator>Brunetti, D</creator><creator>Ham, C J</creator><creator>Graves, J P</creator><creator>Lazzaro, E</creator><creator>Nowak, S</creator><creator>Mariani, A</creator><creator>Wahlberg, C</creator><creator>Cooper, W A</creator><creator>Solano, E R</creator><creator>Saarelma, S</creator><creator>Frassinetti, L</creator><creator>Fontana, M</creator><creator>Kleiner, A</creator><creator>Bustos Ramirez, G</creator><creator>Viezzer, E</creator><general>IOP Publishing</general><general>IOP Science</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OIOZB</scope><scope>OTOTI</scope><scope>ADTPV</scope><scope>AFDQA</scope><scope>AOWAS</scope><scope>D8T</scope><scope>D8V</scope><scope>ZZAVC</scope><scope>ACNBI</scope><scope>DF2</scope><orcidid>https://orcid.org/0000-0001-8650-3271</orcidid><orcidid>https://orcid.org/0000-0001-9190-8310</orcidid><orcidid>https://orcid.org/0000-0002-7959-7959</orcidid><orcidid>https://orcid.org/0000-0002-8817-5344</orcidid><orcidid>https://orcid.org/0000-0002-7979-7483</orcidid><orcidid>https://orcid.org/0000-0001-6419-6848</orcidid><orcidid>https://orcid.org/0000-0003-4680-9190</orcidid><orcidid>https://orcid.org/0000-0003-0476-3825</orcidid><orcidid>https://orcid.org/0000-0003-1989-1926</orcidid><orcidid>https://orcid.org/0000-0002-3291-8890</orcidid><orcidid>https://orcid.org/0000-0002-5800-8027</orcidid><orcidid>https://orcid.org/0000-0002-9546-4494</orcidid><orcidid>https://orcid.org/0000-0002-4815-3407</orcidid><orcidid>https://orcid.org/0000000248153407</orcidid><orcidid>https://orcid.org/0000000164196848</orcidid><orcidid>https://orcid.org/0000000191908310</orcidid><orcidid>https://orcid.org/0000000258008027</orcidid><orcidid>https://orcid.org/0000000279597959</orcidid><orcidid>https://orcid.org/0000000279797483</orcidid><orcidid>https://orcid.org/0000000346809190</orcidid><orcidid>https://orcid.org/0000000295464494</orcidid><orcidid>https://orcid.org/0000000304763825</orcidid><orcidid>https://orcid.org/0000000319891926</orcidid><orcidid>https://orcid.org/0000000232918890</orcidid><orcidid>https://orcid.org/0000000288175344</orcidid><orcidid>https://orcid.org/0000000186503271</orcidid></search><sort><creationdate>20220401</creationdate><title>Understanding JET-C quiescent phases with edge harmonic magnetohydrodynamic activity and comparison with behaviour under ITER-like wall conditioning</title><author>Brunetti, D ; Ham, C J ; Graves, J P ; Lazzaro, E ; Nowak, S ; Mariani, A ; Wahlberg, C ; Cooper, W A ; Solano, E R ; Saarelma, S ; Frassinetti, L ; Fontana, M ; Kleiner, A ; Bustos Ramirez, G ; Viezzer, E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-8f764a74d06ccff6e38ff1174502334e06d0778ae5d4d2d2700c50a583a1e0333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>EHO</topic><topic>ELMs</topic><topic>JET</topic><topic>QH-mode</topic><topic>tokamak</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Brunetti, D</creatorcontrib><creatorcontrib>Ham, C J</creatorcontrib><creatorcontrib>Graves, J P</creatorcontrib><creatorcontrib>Lazzaro, E</creatorcontrib><creatorcontrib>Nowak, S</creatorcontrib><creatorcontrib>Mariani, A</creatorcontrib><creatorcontrib>Wahlberg, C</creatorcontrib><creatorcontrib>Cooper, W A</creatorcontrib><creatorcontrib>Solano, E R</creatorcontrib><creatorcontrib>Saarelma, S</creatorcontrib><creatorcontrib>Frassinetti, L</creatorcontrib><creatorcontrib>Fontana, M</creatorcontrib><creatorcontrib>Kleiner, A</creatorcontrib><creatorcontrib>Bustos Ramirez, G</creatorcontrib><creatorcontrib>Viezzer, E</creatorcontrib><creatorcontrib>Princeton Plasma Physics Lab. 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n
harmonic oscillations are sustained until a threshold in pedestal electron density and collisionality is crossed. The macroscopic pedestal parameters associated with the quiescent phase are compared with those of a database of JET-ELMy discharges with both carbon and ITER-like wall (ILW). This comparison provides the identification of the existence regions in the relevant pedestal and global plasma parameters for edge harmonic oscillations (EHOs) in JET plasmas. Although the ELMy database scans pedestal collisionality and
β
values typical of ET-carbon quiescent operation, shaping and current are not simultaneously compatible with EHO existence. Nevertheless, ILW operation with JET-carbon quiescent-like parameters could in principle be achieved, and improved pedestal performance could be observed in more recent JET-ILW pulses.</abstract><cop>United States</cop><pub>IOP Publishing</pub><doi>10.1088/1361-6587/ac4d3a</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0001-8650-3271</orcidid><orcidid>https://orcid.org/0000-0001-9190-8310</orcidid><orcidid>https://orcid.org/0000-0002-7959-7959</orcidid><orcidid>https://orcid.org/0000-0002-8817-5344</orcidid><orcidid>https://orcid.org/0000-0002-7979-7483</orcidid><orcidid>https://orcid.org/0000-0001-6419-6848</orcidid><orcidid>https://orcid.org/0000-0003-4680-9190</orcidid><orcidid>https://orcid.org/0000-0003-0476-3825</orcidid><orcidid>https://orcid.org/0000-0003-1989-1926</orcidid><orcidid>https://orcid.org/0000-0002-3291-8890</orcidid><orcidid>https://orcid.org/0000-0002-5800-8027</orcidid><orcidid>https://orcid.org/0000-0002-9546-4494</orcidid><orcidid>https://orcid.org/0000-0002-4815-3407</orcidid><orcidid>https://orcid.org/0000000248153407</orcidid><orcidid>https://orcid.org/0000000164196848</orcidid><orcidid>https://orcid.org/0000000191908310</orcidid><orcidid>https://orcid.org/0000000258008027</orcidid><orcidid>https://orcid.org/0000000279597959</orcidid><orcidid>https://orcid.org/0000000279797483</orcidid><orcidid>https://orcid.org/0000000346809190</orcidid><orcidid>https://orcid.org/0000000295464494</orcidid><orcidid>https://orcid.org/0000000304763825</orcidid><orcidid>https://orcid.org/0000000319891926</orcidid><orcidid>https://orcid.org/0000000232918890</orcidid><orcidid>https://orcid.org/0000000288175344</orcidid><orcidid>https://orcid.org/0000000186503271</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Plasma physics and controlled fusion, 2022-04, Vol.64 (4), p.44005 |
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| source | Institute of Physics Journals; SWEPUB Freely available online |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY EHO ELMs JET QH-mode tokamak |
| title | Understanding JET-C quiescent phases with edge harmonic magnetohydrodynamic activity and comparison with behaviour under ITER-like wall conditioning |
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