E×B flux driven detachment bifurcation in the DIII-D tokamak

A bifurcative step transition from low-density, high-temperature, attached divertor conditions to high-density, low-temperature, detached divertor conditions is experimentally observed in DIII-D tokamak plasmas as density is increased. The step transition is only observed in the high confinement mod...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Physical review letters Ročník 121; číslo 7; s. 075001
Hlavní autori: Jaervinen, A. E., Allen, S. L., Eldon, D., Fenstermacher, M. E., Groth, M., Hill, D. N., Leonard, A. W., McLean, A. G., Porter, G. D., Rognlien, T. D., Samuell, C. M., Wang, H. Q.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: United States American Physical Society 17.08.2018
Predmet:
Bifurcation theory
Computer simulation
Density
Dependence
Detaching
Drift
Fluxes
Mathematical models
Plasmas
Potential gradient
Thomson scattering
Tokamak devices
ISSN:0031-9007, 1079-7114, 1079-7114
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Abstract A bifurcative step transition from low-density, high-temperature, attached divertor conditions to high-density, low-temperature, detached divertor conditions is experimentally observed in DIII-D tokamak plasmas as density is increased. The step transition is only observed in the high confinement mode and only when the B×∇B drift is directed towards the divertor. This work reports for the first time a theoretical explanation and numerical simulations that qualitatively reproduce this bifurcation and its dependence on the toroidal field direction. According to the model, the bifurcation is primarily driven by the interdependence of the E×B-drift fluxes, divertor electric potential structure, and divertor conditions. In the attached conditions, strong potential gradients in the low field side (LFS) divertor drive E×B-drift flux towards the high field side divertor, reinforcing low density, high temperature conditions in the LFS divertor leg. At the onset of detachment, reduction in the potential gradients in the LFS divertor leg reduce the E×B-drift flux as well, such that the divertor plasma evolves nonlinearly to high density, strongly detached conditions. Experimental estimates of the E×B-drift fluxes, based on divertor Thomson scattering measurements, and their dependence on the divertor conditions are qualitatively consistent with the numerical predictions. The implications for divertor power exhaust and detachment control in the next step fusion devices are discussed.
AbstractList A bifurcative step transition from low-density, high-temperature, attached divertor conditions to high-density, low-temperature, detached divertor conditions is experimentally observed in DIII-D tokamak plasmas as density is increased. The step transition is only observed in the high confinement mode and only when the B×∇B drift is directed towards the divertor. This work reports for the first time a theoretical explanation and numerical simulations that qualitatively reproduce this bifurcation and its dependence on the toroidal field direction. According to the model, the bifurcation is primarily driven by the interdependence of the E×B-drift fluxes, divertor electric potential structure, and divertor conditions. In the attached conditions, strong potential gradients in the low field side (LFS) divertor drive E×B-drift flux towards the high field side divertor, reinforcing low density, high temperature conditions in the LFS divertor leg. At the onset of detachment, reduction in the potential gradients in the LFS divertor leg reduce the E×B-drift flux as well, such that the divertor plasma evolves nonlinearly to high density, strongly detached conditions. Experimental estimates of the E×B-drift fluxes, based on divertor Thomson scattering measurements, and their dependence on the divertor conditions are qualitatively consistent with the numerical predictions. The implications for divertor power exhaust and detachment control in the next step fusion devices are discussed.
A bifurcative step transition from low-density, high-temperature, attached divertor conditions to high-density, low-temperature, detached divertor conditions is experimentally observed in DIII-D tokamak plasmas as density is increased. The step transition is only observed in the high confinement mode and only when the B×∇B drift is directed towards the divertor. This work reports for the first time a theoretical explanation and numerical simulations that qualitatively reproduce this bifurcation and its dependence on the toroidal field direction. According to the model, the bifurcation is primarily driven by the interdependence of the E×B-drift fluxes, divertor electric potential structure, and divertor conditions. In the attached conditions, strong potential gradients in the low field side (LFS) divertor drive E×B-drift flux towards the high field side divertor, reinforcing low density, high temperature conditions in the LFS divertor leg. At the onset of detachment, reduction in the potential gradients in the LFS divertor leg reduce the E×B-drift flux as well, such that the divertor plasma evolves nonlinearly to high density, strongly detached conditions. Experimental estimates of the E×B-drift fluxes, based on divertor Thomson scattering measurements, and their dependence on the divertor conditions are qualitatively consistent with the numerical predictions. The implications for divertor power exhaust and detachment control in the next step fusion devices are discussed.A bifurcative step transition from low-density, high-temperature, attached divertor conditions to high-density, low-temperature, detached divertor conditions is experimentally observed in DIII-D tokamak plasmas as density is increased. The step transition is only observed in the high confinement mode and only when the B×∇B drift is directed towards the divertor. This work reports for the first time a theoretical explanation and numerical simulations that qualitatively reproduce this bifurcation and its dependence on the toroidal field direction. According to the model, the bifurcation is primarily driven by the interdependence of the E×B-drift fluxes, divertor electric potential structure, and divertor conditions. In the attached conditions, strong potential gradients in the low field side (LFS) divertor drive E×B-drift flux towards the high field side divertor, reinforcing low density, high temperature conditions in the LFS divertor leg. At the onset of detachment, reduction in the potential gradients in the LFS divertor leg reduce the E×B-drift flux as well, such that the divertor plasma evolves nonlinearly to high density, strongly detached conditions. Experimental estimates of the E×B-drift fluxes, based on divertor Thomson scattering measurements, and their dependence on the divertor conditions are qualitatively consistent with the numerical predictions. The implications for divertor power exhaust and detachment control in the next step fusion devices are discussed.
ArticleNumber 075001
Author Hill, D. N.
Leonard, A. W.
Samuell, C. M.
Jaervinen, A. E.
Eldon, D.
Wang, H. Q.
Fenstermacher, M. E.
Groth, M.
Porter, G. D.
McLean, A. G.
Allen, S. L.
Rognlien, T. D.
Author_xml – sequence: 1
  givenname: A. E.
  surname: Jaervinen
  fullname: Jaervinen, A. E.
– sequence: 2
  givenname: S. L.
  surname: Allen
  fullname: Allen, S. L.
– sequence: 3
  givenname: D.
  surname: Eldon
  fullname: Eldon, D.
– sequence: 4
  givenname: M. E.
  surname: Fenstermacher
  fullname: Fenstermacher, M. E.
– sequence: 5
  givenname: M.
  surname: Groth
  fullname: Groth, M.
– sequence: 6
  givenname: D. N.
  surname: Hill
  fullname: Hill, D. N.
– sequence: 7
  givenname: A. W.
  surname: Leonard
  fullname: Leonard, A. W.
– sequence: 8
  givenname: A. G.
  surname: McLean
  fullname: McLean, A. G.
– sequence: 9
  givenname: G. D.
  surname: Porter
  fullname: Porter, G. D.
– sequence: 10
  givenname: T. D.
  surname: Rognlien
  fullname: Rognlien, T. D.
– sequence: 11
  givenname: C. M.
  surname: Samuell
  fullname: Samuell, C. M.
– sequence: 12
  givenname: H. Q.
  surname: Wang
  fullname: Wang, H. Q.
BackLink https://www.ncbi.nlm.nih.gov/pubmed/30169054$$D View this record in MEDLINE/PubMed
https://www.osti.gov/biblio/1464582$$D View this record in Osti.gov
BookMark eNqF0cFu1DAQBmALFdFt4RWqCC5csoztOHYkOEBbYKWVQAjOluNMtG4Tu9hORZ-EB-LF6rKthHrh5Ms39vj_j8iBDx4JOaGwphT4m6-7m_QNr7eY85oyugYpAOgTsqIgu1pS2hyQFQCndQcgD8lRShdQBGvVM3LIgbYdiGZF3p3_-f2hGqflVzVEd42-GjAbu5vR56p34xKtyS74yvkq77A622w29VmVw6WZzeVz8nQ0U8IX9-cx-fHx_Pvp53r75dPm9P22tkzRXLdC9UoZ0duRciEalJLDIA3tBUMsCyvDbNcBh0b2yGjTDtQaM9geRmUV8mPycn9vSNnpZF1Gu7PBe7RZF94IxQp6vUdXMfxcMGU9u2RxmozHsCTNoFOy7RquCn31iF6EJfryBc1KREKohvGiTu7V0s846KvoZhNv9EN6BbzdAxtDShFHXTb7G1eOxk2agr4rS_9Tli5l6X1ZZbx9NP7wwn8GbwG01pn0
CitedBy_id crossref_primary_10_1088_1741_4326_ac8a5f
crossref_primary_10_1088_1741_4326_add35a
crossref_primary_10_1088_1361_6587_ade62e
crossref_primary_10_1088_1361_6587_ad2b90
crossref_primary_10_1088_1741_4326_ab4639
crossref_primary_10_1088_1741_4326_ab8183
crossref_primary_10_1088_1361_6587_ab6b00
crossref_primary_10_1088_1741_4326_ab024a
crossref_primary_10_1088_2058_6272_ace026
crossref_primary_10_1063_5_0175437
crossref_primary_10_1088_1361_6587_ac9b8e
crossref_primary_10_1063_5_0191960
crossref_primary_10_1088_1741_4326_ab8a05
crossref_primary_10_1088_1741_4326_ab7f5c
crossref_primary_10_1080_15361055_2025_2540210
crossref_primary_10_1088_1741_4326_ab26ee
crossref_primary_10_1002_ctpp_202100164
crossref_primary_10_1109_TPS_2020_3036029
crossref_primary_10_1088_1741_4326_ab73c1
crossref_primary_10_1088_1741_4326_abde75
crossref_primary_10_1088_1361_6587_ac6890
crossref_primary_10_1088_1741_4326_aba9ec
crossref_primary_10_1088_1741_4326_ab7c29
crossref_primary_10_1088_1741_4326_ab91fa
crossref_primary_10_1088_1361_6587_adf918
crossref_primary_10_1088_1741_4326_ab77e6
crossref_primary_10_1088_1741_4326_ac9743
crossref_primary_10_1002_ctpp_201900111
crossref_primary_10_1088_1361_6587_ab2b1f
crossref_primary_10_1088_1674_1056_ac4a65
crossref_primary_10_1088_1361_6587_ad481d
crossref_primary_10_1088_1361_6587_adf881
crossref_primary_10_1088_1361_6587_ad3c1c
crossref_primary_10_1088_1741_4326_abb53f
crossref_primary_10_1088_1741_4326_ab3811
crossref_primary_10_1088_1361_6587_ab4122
crossref_primary_10_1088_1741_4326_ab7d4f
Cites_doi 10.1088/0029-5515/34/10/I04
10.1088/0029-5515/55/5/053026
10.1016/S0022-3115(98)00818-6
10.1063/1.873488
10.1088/1741-4326/aa6b16
10.1103/PhysRevLett.83.3657
10.1088/0029-5515/56/5/056007
10.13182/FST07-A1428
10.1088/0741-3335/57/3/035004
10.1063/1.1147893
10.1063/1.871257
10.1016/S0022-3115(97)00109-8
10.1063/1.873915
10.1088/0029-5515/47/6/S04
10.1088/0741-3335/55/12/124041
10.1016/j.jnucmat.2015.01.066
10.1016/j.nme.2017.03.021
10.1088/0029-5515/37/1/I07
10.1016/S0022-3115(97)80029-3
10.1103/PhysRevLett.60.2276
10.1088/0741-3335/49/12B/S01
ContentType Journal Article
Copyright Copyright American Physical Society Aug 17, 2018
Copyright_xml – notice: Copyright American Physical Society Aug 17, 2018
DBID AAYXX
CITATION
NPM
7U5
8FD
H8D
L7M
7X8
OTOTI
DOI 10.1103/PhysRevLett.121.075001
DatabaseName CrossRef
PubMed
Solid State and Superconductivity Abstracts
Technology Research Database
Aerospace Database
Advanced Technologies Database with Aerospace
MEDLINE - Academic
OSTI.GOV
DatabaseTitle CrossRef
PubMed
Aerospace Database
Solid State and Superconductivity Abstracts
Technology Research Database
Advanced Technologies Database with Aerospace
MEDLINE - Academic
DatabaseTitleList PubMed
Aerospace Database
MEDLINE - Academic
Database_xml – sequence: 1
  dbid: NPM
  name: PubMed
  url: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed
  sourceTypes: Index Database
– sequence: 2
  dbid: 7X8
  name: MEDLINE - Academic
  url: https://search.proquest.com/medline
  sourceTypes: Aggregation Database
DeliveryMethod fulltext_linktorsrc
Discipline Physics
EISSN 1079-7114
ExternalDocumentID 1464582
30169054
10_1103_PhysRevLett_121_075001
Genre Journal Article
GroupedDBID ---
-DZ
-~X
123
186
2-P
29O
3MX
3O-
41~
5VS
6TJ
85S
8NH
8WZ
9M8
A6W
AAYJJ
AAYXX
ABSSX
ABUFD
ACBEA
ACGFO
ACKIV
ACNCT
ADXHL
AECSF
AENEX
AEQTI
AETEA
AFFNX
AFGMR
AGDNE
AJQPL
ALMA_UNASSIGNED_HOLDINGS
APKKM
AUAIK
CITATION
CS3
D0L
DU5
EBS
EJD
ER.
F5P
H~9
MVM
N9A
NEJ
NHB
NPBMV
OHT
OK1
P0-
P2P
RNS
ROL
S7W
SJN
T9H
TN5
UBC
UBE
VOH
WH7
XOL
XSW
YNT
YYP
ZCG
ZPR
ZY4
~02
NPM
UCJ
VQA
7U5
8FD
H8D
L7M
7X8
60C
AAPBV
ABCKA
ABPTK
ADETJ
OTOTI
XFK
ID FETCH-LOGICAL-c281t-658b88a5bcf13554e7730d7a1b52ee0798a2c9903047be2146d1caadcb0f8c8e3
IEDL.DBID 3MX
ISSN 0031-9007
1079-7114
IngestDate Fri May 19 00:35:31 EDT 2023
Fri Jul 11 15:57:10 EDT 2025
Sun Nov 09 08:48:53 EST 2025
Thu Jan 02 23:10:21 EST 2025
Tue Nov 18 22:22:04 EST 2025
Sat Nov 29 01:47:01 EST 2025
IsPeerReviewed true
IsScholarly true
Issue 7
Language English
LinkModel DirectLink
MergedId FETCHMERGED-LOGICAL-c281t-658b88a5bcf13554e7730d7a1b52ee0798a2c9903047be2146d1caadcb0f8c8e3
Notes ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
USDOE
FC02-04ER54698; AC52-07NA27344; 17-ERD-020
PMID 30169054
PQID 2126558423
PQPubID 2048222
ParticipantIDs osti_scitechconnect_1464582
proquest_miscellaneous_2098769438
proquest_journals_2126558423
pubmed_primary_30169054
crossref_citationtrail_10_1103_PhysRevLett_121_075001
crossref_primary_10_1103_PhysRevLett_121_075001
PublicationCentury 2000
PublicationDate 2018-Aug-17
PublicationDateYYYYMMDD 2018-08-17
PublicationDate_xml – month: 08
  year: 2018
  text: 2018-Aug-17
  day: 17
PublicationDecade 2010
PublicationPlace United States
PublicationPlace_xml – name: United States
– name: College Park
PublicationTitle Physical review letters
PublicationTitleAlternate Phys Rev Lett
PublicationYear 2018
Publisher American Physical Society
Publisher_xml – name: American Physical Society
References PhysRevLett.121.075001Cc20R1
PhysRevLett.121.075001Cc10R1
PhysRevLett.121.075001Cc11R1
PhysRevLett.121.075001Cc12R1
PhysRevLett.121.075001Cc13R1
PhysRevLett.121.075001Cc14R1
PhysRevLett.121.075001Cc24R1
PhysRevLett.121.075001Cc15R1
PhysRevLett.121.075001Cc16R1
PhysRevLett.121.075001Cc17R1
S. I. Braginskii (PhysRevLett.121.075001Cc23R1) 1965
PhysRevLett.121.075001Cc18R1
PhysRevLett.121.075001Cc8R1
PhysRevLett.121.075001Cc19R1
PhysRevLett.121.075001Cc9R1
P. C. Stangeby (PhysRevLett.121.075001Cc22R1) 2000
PhysRevLett.121.075001Cc6R1
PhysRevLett.121.075001Cc7R1
PhysRevLett.121.075001Cc3R1
PhysRevLett.121.075001Cc4R1
PhysRevLett.121.075001Cc2R1
PhysRevLett.121.075001Cc5R1
PhysRevLett.121.075001Cc1R1
References_xml – volume-title: The Plasma Boundary of Magnetic Fusion Devices
  year: 2000
  ident: PhysRevLett.121.075001Cc22R1
– ident: PhysRevLett.121.075001Cc8R1
  doi: 10.1088/0029-5515/34/10/I04
– ident: PhysRevLett.121.075001Cc9R1
  doi: 10.1088/0029-5515/55/5/053026
– ident: PhysRevLett.121.075001Cc12R1
  doi: 10.1016/S0022-3115(98)00818-6
– volume-title: Reviews in Plasma Physics
  year: 1965
  ident: PhysRevLett.121.075001Cc23R1
– ident: PhysRevLett.121.075001Cc16R1
  doi: 10.1063/1.873488
– ident: PhysRevLett.121.075001Cc15R1
  doi: 10.1088/1741-4326/aa6b16
– ident: PhysRevLett.121.075001Cc3R1
  doi: 10.1103/PhysRevLett.83.3657
– ident: PhysRevLett.121.075001Cc7R1
  doi: 10.1088/0029-5515/56/5/056007
– ident: PhysRevLett.121.075001Cc10R1
  doi: 10.13182/FST07-A1428
– ident: PhysRevLett.121.075001Cc11R1
  doi: 10.1088/0741-3335/57/3/035004
– ident: PhysRevLett.121.075001Cc13R1
  doi: 10.1063/1.1147893
– ident: PhysRevLett.121.075001Cc6R1
  doi: 10.1063/1.871257
– ident: PhysRevLett.121.075001Cc17R1
  doi: 10.1016/S0022-3115(97)00109-8
– ident: PhysRevLett.121.075001Cc20R1
  doi: 10.1063/1.873915
– ident: PhysRevLett.121.075001Cc4R1
  doi: 10.1088/0029-5515/47/6/S04
– ident: PhysRevLett.121.075001Cc5R1
  doi: 10.1088/0741-3335/55/12/124041
– ident: PhysRevLett.121.075001Cc14R1
  doi: 10.1016/j.jnucmat.2015.01.066
– ident: PhysRevLett.121.075001Cc19R1
  doi: 10.1016/j.nme.2017.03.021
– ident: PhysRevLett.121.075001Cc24R1
  doi: 10.1088/0029-5515/37/1/I07
– ident: PhysRevLett.121.075001Cc18R1
  doi: 10.1016/S0022-3115(97)80029-3
– ident: PhysRevLett.121.075001Cc1R1
  doi: 10.1103/PhysRevLett.60.2276
– ident: PhysRevLett.121.075001Cc2R1
  doi: 10.1088/0741-3335/49/12B/S01
SSID ssj0001268
Score 2.5566933
Snippet A bifurcative step transition from low-density, high-temperature, attached divertor conditions to high-density, low-temperature, detached divertor conditions...
SourceID osti
proquest
pubmed
crossref
SourceType Open Access Repository
Aggregation Database
Index Database
Enrichment Source
StartPage 075001
SubjectTerms Bifurcation theory
Computer simulation
Density
Dependence
Detaching
Drift
Fluxes
Mathematical models
Plasmas
Potential gradient
Thomson scattering
Tokamak devices
Title E×B flux driven detachment bifurcation in the DIII-D tokamak
URI https://www.ncbi.nlm.nih.gov/pubmed/30169054
https://www.proquest.com/docview/2126558423
https://www.proquest.com/docview/2098769438
https://www.osti.gov/biblio/1464582
Volume 121
hasFullText 1
inHoldings 1
isFullTextHit
isPrint
journalDatabaseRights – providerCode: PRVABR
  databaseName: American Physical Society Journals (OCUL)
  customDbUrl:
  eissn: 1079-7114
  dateEnd: 99991231
  omitProxy: false
  ssIdentifier: ssj0001268
  issn: 0031-9007
  databaseCode: 3MX
  dateStart: 20020101
  isFulltext: true
  titleUrlDefault: https://journals.aps.org/
  providerName: American Physical Society
– providerCode: PRVIAO
  databaseName: SCOAP3 Journals
  customDbUrl:
  eissn: 1079-7114
  dateEnd: 99991231
  omitProxy: false
  ssIdentifier: ssj0001268
  issn: 0031-9007
  databaseCode: ER.
  dateStart: 20180101
  isFulltext: true
  titleUrlDefault: https://scoap3.org/
  providerName: SCOAP3 (Sponsoring Consortium for Open Access Publishing in Particle Physics)
link http://cvtisr.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwlV3fT9swED5VFZP2wo9tsFJARtprwImd2n7gASholUY1TSD1LXIcR1Qt6dSm1f6T_UH7x3aXhAokEOIlL4kj587n74vv_BngW-Z0lEe5CrzpyUAayYOUNvsohCtEoNgJX3n6hxoO9WhkfraAv5zBD7k4pUrIX35Fu1tICuGEMK7esKUlieWLm9F66g2jXj31Cqo74KrZEvz6a56hUXuGUfU606wQ53rr_X3dhs2GXbLzejjsQMsXn-BDVeXpFp_h7Orf3wuWT5d_WDanaY5RBam7pxVClo7z5bxewGPjgiExZP3BYBD0WTmb2Ac7-QJ311e3l9-D5vyEwEU6LAMkF6nWNk5dHhKt8ArDOVM2TOPIe66MtpFDNKLMW-rphO8sdNZmLuW5dtqLXWgXs8J_BYZhLUwuhZfWyl5uDakERZ4Lqbxxme5A_GjHxDXi4nTGxTSpfjK4SJ6YJkHTJLVpOnC6bve7ltd4s0WX3JQgQSCVW0flQK6kPxjKAHbg4NF7SROMiwTRuRcj0YpEB47XtzGMKDdiCz9b4jPcIC4YKfBT9mqvrzskSLEGqe3-uzvbhY9IsEgCPAjVAbTL-dIfwoZblePF_Kgau3hVI_0f7wzqKA
linkProvider American Physical Society
openUrl ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=E%C3%97B+Flux+Driven+Detachment+Bifurcation+in+the+DIII-D+Tokamak&rft.jtitle=Physical+review+letters&rft.au=Jaervinen%2C+A+E&rft.au=Allen%2C+S+L&rft.au=Eldon%2C+D&rft.au=Fenstermacher%2C+M+E&rft.date=2018-08-17&rft.eissn=1079-7114&rft.volume=121&rft.issue=7&rft.spage=075001&rft_id=info:doi/10.1103%2FPhysRevLett.121.075001&rft_id=info%3Apmid%2F30169054&rft.externalDocID=30169054
thumbnail_l http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/lc.gif&issn=0031-9007&client=summon
thumbnail_m http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/mc.gif&issn=0031-9007&client=summon
thumbnail_s http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/sc.gif&issn=0031-9007&client=summon