6533b830fe1ef96bd12968d2
RESEARCH PRODUCT
Confinement in Wendelstein 7-X limiter plasmas
Andreas LangenbergOlaf GrulkeM. KrychowiakFabio PisanoR. BrakelN. KrawczykMonika KubkowskaE. BlancoHans-stephan BoschP. KornejewM. HirschT. FornalJ. BaldzuhnTamás SzepesiTamara AndreevaMatthias OtteH. P. LaquaN. A. PablantA. WernerM. W. JakubowskiNikolai B. MarushchenkoT. SchröderC. D. BeidlerE. PaschA. CzarneckaSamuel LazersonV. MoncadaYu. TurkinTorsten StangeChristoph BiedermannM. EndlerR. BurhennDirk NaujoksS. MarsenJ. GeigerJ. H. HarrisH. Trimino MoraT. EstradaA. CappaAndreas DinklageB. ButtenschönR. KönigDmitry MoseevH. ThomsenG. M. WeirJ. P. KnauerH. MaaßbergA. AlonsoG. A. WurdenS. A. BozhenkovD. ZhangThomas Sunn PedersenU. WenzelHayato TsuchiyaM. N. A. BeurskensLaurie StepheyTom WautersKian RahbarniaThomas KlingerG. KocsisI. KsiazekD. A. HartmannU. HöfelA. Krämer-fleckenG. FuchertR. C. Wolfsubject
PhysicsNuclear and High Energy Physicsstellaratorconfinement0103 physical sciences010306 general physicsCondensed Matter Physics01 natural sciencesenergy confinement010305 fluids & plasmasdescription
Observations on confinement in the first experimental campaign on the optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus the discharge length restricted to avoid local overheating. Stationary plasmas are limited to low densities <2–3 · 1019 m−3. With the available 4.3 MW ECR Heating core Te ~ 8 keV, Ti ~ 1–2 keV are achieved routinely resulting in energy confinement time τE between 80 ms to 150 ms. For these conditions the plasmas show characteristics of core electron root confinement with peaked Te-profiles and positive Er up to about half of the minor radius. Profiles and plasma currents respond to on- and off-axis heating and co- and counter ECCD respectively.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-06-14 | Nuclear Fusion |