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Your search keyword '"Basse, N.P."' showing total 12 results
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12 results on '"Basse, N.P."'

1. Trace tritium and the H-mode density limit

Author

Matthews, G.F., Zastrow, K.-D., Andrew, P., Balet, B., Basse, N.P., Ehrenberg, J., Erents, S.K., Guo, H., Jarvis, N., Loughlin, M., Marcus, F., Monk, R., O'Mullane, M., Lauro-Taroni, L., Sadler, G., Saibene, G., Simonini, R., Stangeby, P.C., Strachan, J., and Taroni, A.

Published
1999
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3. Turbulence at the transition to the high density H-mode in Wendelstein 7-AS plasmas

Author

Basse, N.P., Zoletnik, S., Baumel, S., Endler, M., Hirsch, M., McCormick, K., Werner, A., Basse, N.P., Zoletnik, S., Baumel, S., Endler, M., Hirsch, M., McCormick, K., and Werner, A.

Abstract

Recently a new improved confinement regime was found in the Wendelstein 7-AS (W7-AS) stellarator (Renner H. et al 1989 Plasma Phys. Control. Fusion 31 1579). The discovery of this high density high confinement mode (HDH-mode) was facilitated by the installation of divertor modules. In this paper, measurements of short wavelength density fluctuations in the HDH-mode using collective scattering of infrared light are presented. These measurements will be contrasted to fluctuations during normal confinement operation (NC-mode). The autopower spectra of the measurements show a consistent increase of the fluctuation level associated with the transition from NC- to HDH-mode. Correlation calculations on a 20 mus timescale between magnetic and density fluctuations lead to the result that the fluctuations are correlated in NC- but not in HDH-mode. Finally, a comparative analysis between the enhanced D-alpha H-mode (EDA H-mode) found in the Alcator C-Mod tokamak and the HDH-mode in W7-AS is carried out.

Published
2003

9. Transport phenomena in the edge of Alcator C-Mod plasmas

Author

Terry, J.L, primary, Basse, N.P, additional, Cziegler, I, additional, Greenwald, M, additional, Grulke, O, additional, LaBombard, B, additional, Zweben, S.J, additional, Edlund, E.M, additional, Hughes, J.W, additional, Lin, L, additional, Lin, Y, additional, Porkolab, M, additional, Sampsell, M, additional, Veto, B, additional, and Wukitch, S.J, additional

Published
2005
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11. Control and Data Acquisition System for Lower Hybrid Current Drive in Alcator C-Mod.

Author

Basse, N.P., Bosco, J., Fredian, T.W., Grimes, M., Kambouchev, N.D., Lin, Y., Parker, R.R., Rokhman, Y.I., Stillerman, J.A., Terry, D.R., and Wukitch, S.J.

Subjects
*TOKAMAKS, *COMMAND & control systems, *DIRECTIONAL couplers, *KLYSTRONS, *MAGNETOHYDRODYNAMICS, *COMPUTER software
Abstract

A lower hybrid current drive (LHCD) system is being installed on the Alcator C-Mod tokamak. Initially, 12 klystrons operating at 4.6 GHz will deliver a total power of 3 MW to the coupler. The LHCD system will make it possible to modify the current density profile in the outer half of the plasma. This implies that the q-profile can be manipulated, thereby enabling the study of advanced tokamak regimes. In this paper we describe the overall structure of the control and data acquisition system for LHCD. The acquisition setup collects data from the active controller, the transmitter protection and the coupler protection systems. Long pulse tests of the klystrons are presented and a monitor camera is introduced. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2003
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