Results 201 to 210 of about 311,592 (233)

ICRF system enhancements at ASDEX upgrade

Fusion Engineering and Design, 2001
The ion cyclotron range of frequency (ICRF) heating system at the tokamak ASDEX Upgrade has been in operation since 1991. It still continues to be modified in order to improve its efficiency, flexibility and reliability and to meet changing physics demands.
Braun, F., Hofmeister, F., Wesner, F., Becker, W., Faugel, H., Hartmann, D., Noterdaeme, J.   +6 more
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Experience with the ECRH system of ASDEX-Upgrade

Fusion Engineering and Design, 2001
The 140 GHz ASDEX-Upgrade ECRH system uses four gyrotrons to generate a total power of 2 MW in a Gaussian beam for 2 s. External magnetic perturbations, originating from the poloidal stray magnetic field of the tokamak air core transformer, and also from the cryomagnet of the adjacent gyrotron, influence the startup of the oscillation and the electron ...
Leuterer, F., Beckmann, M., Brinkschulte, H., Monaco, F., Münich, M., Ryter, F., Schütz, H., Empacher, L., Gantenbein, G., Förster, W., Kasparek, W., Schüller, P., Schwörer, K., Borchegowski, A., Fix, A., Illin, V., Popov, L., Sigalaev, V., Tai, E.   +18 more
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B2-Eirene modelling of ASDEX Upgrade

Journal of Nuclear Materials, 1997
Abstract The extension of the computational region of the coupled fluid plasma, Monte-Carlo neutrals code, B2-Eirene, to the plasma center is discussed. The simulation of completely detached H-mode plasma is presented, as is the modelling of He and Ne compression.
Coster, D., Schneider, R., Neuhauser, J., Bosch, H., Wunderlich, R., Fuchs, C., Mast, F., Kallenbach, A., Dux, R., Becker, G., Braams, B., Reiter, D.   +11 more
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Ion orbit loss current in ASDEX Upgrade

Plasma Physics and Controlled Fusion, 1998
The orbit loss current is calculated for the ASDEX Upgrade geometry using the 5D (3D in configuration space and 2D in velocity space) Monte Carlo code ASCOT. The balance between the obtained current and the analytical estimate of the return current shows an L-H transition for the normalized collision frequency υ*i≈1 as expected from analytic theory ...
Heikkinen, J., Kiviniemi, T., Peeters, A., Kurki-Suonio, T., Sipila, S., Herrmann, W., Suttrop, W., Zohm, H.   +7 more
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The RF system and matching procedure for ASDEX and ASDEX upgrade

Fusion Engineering and Design, 1994
Abstract The ICRH system outline of both the former ASDEX and the present ASDEX Upgrade experiment is described with regard to the matching procedure. The matching experience gained from the operation of ICRH on ASDEX lead to improvements in the ICRH operation on ASDEX Upgrade.
Hofmeister, F., Braun, F., Wesner, F.
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ASDEX UPGRADE: THE FIRST PERIOD OF OPERATION

1993
The first plasma in ASDEX Upgrade (AUG) was produced on 21stMarch '91 after more than 8 years of design, manufacture, and assembly. During the first operational period until August '92, with 1949 shots, the control and safety systems were commissioned in parallel with plasma discharges. Most discharges were run with He, but also H and D discharges were
Streibl, B., Behler, K. ; https://orcid.org/0000-0003-2845-8024, McCarthy, P., Drube, R., Ernesti, J., Finkelmeyer, H., Gernhardt, J., Gruber, O., Herppich, G., Hupfloher, H., Jacobi, D., Klement, G., Kollotzek, H., Koeppendoerfer, W., Lackner, K., Mattes, K., Mertens, V., Neu, G., Noterdaeme, J., Oswald, J., Poschenrieder, W., Raupp, G., Richter, H., Richter, T., Schneider, H., Schramm, G., Schweizer, S., Seidel, U., Vernickel, H., Wieczorek, A., Wesner, F., Woyke, W., Zasche, D.   +32 more
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ASDEX UPGRADE POWER SUPPLY SYSTEM

1986
ASDEX Upgrade, the successor to the ASDEX device, is a new tokamak now under construction at Garching [1]. This experiment has a reactor-like divertor with the divertor coils located outside the toroidal field coils. This makes the power and energy requirements high since the total number of ampere-turns of the multipole coils increases approximately ...
Blaumoser, M., Kottmair, M., Wieczorek, A., Gruber, O.   +3 more
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POSITION AND SHAPE CONTROL ON ASDEX-UPGRADE

1993
ASDEX Upgrade utilizes a feedback control system for the plasma current, position and shape, which is novel in its approach to control local and global equilibrium parameters, its algorithm for the determination of the plasma equilibrium (via a function parameterization technique from magnetic measurements), its fully digital implementation, and its ...
Gruber, O., Gernhardt, J., McCarthy, P., Lackner, K., Seidel, U., Schneider, W., Woyke, W., Zehrfeld, H.   +7 more
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ASDEX UPGRADE OHMIC HEATING CIRCUIT

1986
The OH system of ASDEX Upgrade provides a maximum flux swing of 9.5 Wb and a maximum plasma breakdown voltage of 35 V. The corresponding OH coil data are 50 kA and 30 kV.
Blaumoser, M., Wieczorek, A., Dorst, D., Feilcke, F., Weigand, W.   +4 more
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Operation and upgrade of the ECRH system at ASDEX upgrade

2014 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014
Wagner, D., Stober, J., Leuterer, F., Monaco, F., Müller, S., Münich, M., Rapson, C., Reich, M., Schubert, M., Schütz, H., Treutterer, W., Zohm, H., Thumm, M., Scherer, T., Meier, A., Gantenbein, G., Jelonnek, J., Kasparek, W., Lechte, C., Plaum, B., Litvak, A. G., Denisov, G. G., Chirkov, A., Popov, L. G., Nichiporenko, V. O., Myasnikov, V. E., Tai, E. M., Solyanova, E. A., Malygin, S. A., ASDEX Upgrade Team   +29 more
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