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McCormick K, Grigull P, Burhenn R, et al. New advanced operational regime on the W7-AS stellarator. Phys Rev Lett. 2002;89(1):015001doi: 10.1103/PhysRevLett.89.015001.
McCormick, K., Grigull, P., Burhenn, R., Brakel, R., Ehmler, H., Feng, Y., Gadelmeier, F., Giannone, L., Hildebrandt, D., Hirsch, M., Jaenicke, R., Kisslinger, J., Klinger, T., Klose, S., Knauer, J. P., König, R., Kühner, G., Laqua, H. P., Naujoks, D., Niedermeyer, H., Pasch, E., Ramasubramanian, N., Rust, N., Sardei, F., Wagner, F., Weller, A., Wenzel, U., & Werner, A. (2002). New advanced operational regime on the W7-AS stellarator. Physical review letters, 89(1), 015001. https://doi.org/10.1103/PhysRevLett.89.015001
McCormick, K, et al. "New advanced operational regime on the W7-AS stellarator." Physical review letters vol. 89,1 (2002): 015001. doi: https://doi.org/10.1103/PhysRevLett.89.015001
McCormick K, Grigull P, Burhenn R, Brakel R, Ehmler H, Feng Y, Gadelmeier F, Giannone L, Hildebrandt D, Hirsch M, Jaenicke R, Kisslinger J, Klinger T, Klose S, Knauer JP, König R, Kühner G, Laqua HP, Naujoks D, Niedermeyer H, Pasch E, Ramasubramanian N, Rust N, Sardei F, Wagner F, Weller A, Wenzel U, Werner A. New advanced operational regime on the W7-AS stellarator. Phys Rev Lett. 2002 Jul 01;89(1):015001. doi: 10.1103/PhysRevLett.89.015001. Epub 2002 Jun 11. PMID: 12097046.
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Phys Rev Lett. 2002 Jul 01;89(1):015001. doi: 10.1103/PhysRevLett.89.015001. Epub 2002 Jun 11.

New advanced operational regime on the W7-AS stellarator.

Physical review letters

K McCormick, P Grigull, R Burhenn, R Brakel, H Ehmler, Y Feng, F Gadelmeier, L Giannone, D Hildebrandt, M Hirsch, R Jaenicke, J Kisslinger, T Klinger, S Klose, J P Knauer, R König, G Kühner, H P Laqua, D Naujoks, H Niedermeyer, E Pasch, N Ramasubramanian, N Rust, F Sardei, F Wagner, A Weller, U Wenzel, A Werner

Affiliations

  1. Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching, Germany. [email protected]

PMID: 12097046 DOI: 10.1103/PhysRevLett.89.015001

Abstract

A promising new plasma operational regime on the Wendelstein stellarator W7-AS has been discovered. It is extant above a threshold density and characterized by flat density profiles, high energy and low impurity confinement times, and edge-localized radiation. Impurity accumulation is avoided. Quasistationary discharges with line-averaged densities n(e) to 4 x 10(20) m(-3), radiation levels to 90%, and partial plasma detachment at the divertor target plates can be simultaneously realized. Energy confinement is up to twice that of a standard scaling. At B(t) = 0.9 T, an average beta value of 3.1% is achieved. The high n(e) values allow demonstration of electron Bernstein wave heating using linear mode conversion.

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