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  Dependence of particle transport on the heating profile in ASDEX Upgrade

Stober, J., Dux, R., Gruber, O., Horton, L., Maggi, C., Meo, F., et al. (2003). Dependence of particle transport on the heating profile in ASDEX Upgrade. In Fusion Energy 2002. Vienna: International Atomic Energy Agency.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-3B6A-B Version Permalink: https://hdl.handle.net/21.11116/0000-0008-52DC-4
Genre: Conference Paper

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 Creators:
Stober, J.1, Author           
Dux, R.2, Author           
Gruber, O.3, Author           
Horton, L.1, Author           
Maggi, C.2, Author           
Meo, F.4, Author
Neu, R.2, Author           
Noterdaeme, J.-M.5, Author           
Lang, P. T.1, Author           
Lorenzini, R.6, Author
Peeters, A.3, Author           
Pereverzev, G.7, Author           
Ryter, F.8, Author           
Sips, A. C. C.1, Author           
Stäbler, A.5, Author           
Zohm, H.9, Author           
ASDEX Upgrade Team4, Author
Affiliations:
1Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
2Experimental Plasma Physics 4 (E4), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856293              
3Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society, ou_persistent22              
4Max Planck Society, ou_persistent13              
5Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856318              
6Consorzio RFX, Padova, Italy, ou_persistent22              
7Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856309              
8Tokamak Edge and Divertor Physics (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856308              
9Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              

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 Abstract: The slow peaking of the density profile for high densities with moderate NBI and its disappearance with central ICRH have been reported at the last IAEA conference in Sorrento. Meanwhile a modell asumming D = 0.1 - - 0.15 χeff and the Ware-pinch has been used successfully to describe the data. Independently we have proven that the peaking is not due to differences of particle fuelling, since off-axis ICRH also leads to peaked density profiles. With the modification of treating the neoclassical ion-heat-flux separately the model holds also for discharges with lower plasma current and even for the density decay after pellet fuelling. The model is also related to the ECRH density pump-out. The separation of electron and ion chanel at low densities will be addressed. Central heating also increases the anomalous diffusivity of impurity ions which is beneficial for a fusion rector. Also Neoclassical Tearing Modes are more stable with central heating due to the flattening of the density profiles in accordance with the theoretical predictions for the dependence of the bootstrap current on the density gradient.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Internal
 Identifiers: eDoc: 59914
 Degree: -

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Title: 19th Fusion Energy Conference
Place of Event: Lyon (FR)
Start-/End Date: 2002-10-14 - 2002-10-19

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Title: Fusion Energy 2002
Source Genre: Proceedings
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Publ. Info: Vienna : International Atomic Energy Agency
Pages: CD-ROM Volume / Issue: - Sequence Number: EX/C3-7Rb Start / End Page: - Identifier: -