English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

A new quasi-stationary, very high density plasma regime on the W7-AS stellarator

MPS-Authors
/persons/resource/persons109491

Jaenicke,  R.
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108602

Bäumel,  S.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108767

Brakel,  R.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons108825

Burhenn,  R.
VINETA, Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109011

Ehmler,  H.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109027

Endler,  M.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109043

Erckmann,  V.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109074

Feng,  Y.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109156

Geiger,  J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109170

Giannone,  L.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109226

Grigull,  P.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109309

Hartfuß,  H.-J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109312

Hartmann,  D.
Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109390

Hildebrandt,  D.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109397

Hirsch,  M.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109609

Kisslinger,  J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109625

Klinger,  T.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;
VINETA, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109629

Klose,  S.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109636

Knauer,  J.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109653

König,  R.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109723

Kühner,  G.
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109764

Laqua,  H.
W7-X: Construction, Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109858

Maaßberg,  H.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109914

McCormick,  K.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110034

Narayanan,  R.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110054

Niedermeyer,  H.
W7-X: Construction, Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110111

Pasch,  E.
Stellarator Optimisation (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110298

Rust,  N.
W7-X: Heating (HT), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110320

Sardei,  F.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110434

Schubert,  M.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110545

Speth,  E.
Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110725

Wagner,  F.
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110770

Weller,  A.
Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society;
Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110778

Wenzel,  U.
Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110781

Werner,  A.
W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons110835

Würsching,  E.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Jaenicke, R., Bäumel, S., Baldzuhn, J., Brakel, R., Burhenn, R., Ehmler, H., et al. (2002). A new quasi-stationary, very high density plasma regime on the W7-AS stellarator. Plasma Physics and Controlled Fusion, 44(Suppl. 12B), B193-B205.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-41CD-7
Abstract
Stellarators have the intrinsic property of steady state operation. However, on present-day stellarators the pulse length is usually not only limited due to technical reasons, but also by physical problems. Lack of density control and a subsequent radiation collapse terminate the discharges quite often at high densities. To improve the control of the plasma- wall interaction, the island divertor concept was developed for optimized stellarators. To test this divertor concept on W7-AS, all limiters were removed and replaced by ten divertor modules. In subsequent divertor experiments a promising new plasma operational regime has been discovered which is termed 'high density H-mode' (HDH-mode). During the transition into that regime a clear reduction of ELM-like events and turbulent fluctuations is observed. The HDH-mode combines good energy confinement with very low impurity confinement resulting in low core radiation, but high edge-localized radiation. Consequently, stationary discharges at densities of typically 2 x 10(20) m(-3) can be performed within the accessible pulse length of about 1 s. At densities above 3 x 10(20 m-3) a controlled transition from attached to partially detached plasmas is observed. The still edge-localized radiation reaches 90% of the heating power so that the power load onto the divertor target plates is further reduced. At a lower toroidal field of 0.9 T average beta-values could be raised from earlier 2% to more than 3% in magnetic field configurations with rather smooth flux surfaces at the plasma boundary. The recently obtained results render excellent prospects for W7-X, the larger superconducting successor experiment of W7-AS.