Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Effect of gas injection during LH wave coupling at ITER-relevant plasma-wall distances in JET
Vise andre og tillknytning
2009 (engelsk)Inngår i: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 51, nr 4Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Good coupling of lower hybrid (LH) waves has been demonstrated in different H-mode scenarios in JET, at high triangularity (delta similar to 0.4) and at large distance between the last closed flux surface and the LH launcher ( up to 15 cm). Local gas injection of D-2 in the region magnetically connected to the LH launcher is used for increasing the local density in the scrape-off layer ( SOL). Reciprocating Langmuir probe measurements magnetically connected to the LH launcher indicate that the electron density profile flattens in the far SOL during gas injection and LH power application. Some degradation in normalized H-mode confinement, as given by the H98(gamma,2)-factor, could be observed at high gas injection rates in these scenarios, but this was rather due to total gas injection and not specifically to the local gas puffing used for LH coupling. Furthermore, experiments carried out in L-mode plasmas in order to evaluate the effect on the LH current drive efficiency, when using local gas injection to improve the coupling, indicate only a small degradation (Delta I-LH/I-LH similar to 15%). This effect is largely compensated by the improvement in coupling and thus increase in coupled power when using gas puffing.

sted, utgiver, år, opplag, sider
2009. Vol. 51, nr 4
Emneord [en]
lower-hybrid waves, internal transport barriers, joint european torus, current drive, tokamak plasmas, magnetic shear, edge, scenario, models, power
Identifikatorer
URN: urn:nbn:se:kth:diva-18314DOI: 10.1088/0741-3335/51/4/044001ISI: 000264708500002Scopus ID: 2-s2.0-67649695978OAI: oai:DiVA.org:kth-18314DiVA, id: diva2:336360
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Rachlew, Elisabeth

Søk i DiVA

Av forfatter/redaktør
Rachlew, Elisabeth
Av organisasjonen
I samme tidsskrift
Plasma Physics and Controlled Fusion

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 214 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf