Results 71 to 80 of about 108,499 (193)

Extension of electron cyclotron heating at ASDEX Upgrade with respect to high density operation

EPJ Web of Conferences, 2017
The ASDEX Upgrade electron cyclotron resonance heating operates at 105 GHz and 140 GHz with flexible launching geometry and polarization. In 2016 four Gyrotrons with 10 sec pulse length and output power close to 1 MW per unit were available.
Schubert Martin, Stober Jörg, Herrmann Albrecht, Kasparek Walter, Leuterer Fritz, Monaco Francesco, Petzold Bernhard, Plaum Burkhard, Vorbrugg Stefan, Wagner Dietmar, Zohm Hartmut   +10 more
doaj   +1 more source

Extrapolation of ASDEX Upgrade H-mode discharges to ITER [PDF]

, 2009
In this paper we discuss a procedure to evaluate the fusion performance of ASDEX Upgrade discharges scaled up to ITER. The kinetic profile shape is taken from the measured profiles. Multiplication factors are used to obtain a fixed Greenwald fraction and
Peeters, A., Horton, L., Sips, A. C. C., HASH(0x55a67f4a5508), Peeters, A. G., Kardaun, O., Tardini, G., Pereverzev, G. V., Sips, A., Kardaun, O. J. W. F., Pereverzev, G., Stober, J., Maggi, C.   +12 more
core   +1 more source

Chemically assisted physical sputtering of Tungsten: Identification via the 6Π→6Σ+ transition of WD in TEXTOR and ASDEX Upgrade plasmas

Nuclear Materials and Energy, 2019
Tungsten (W) is a preferred plasma-facing material for areas of high particle and power impact in present day and future fusion devices. The lifetime of W plasma-facing components (PFCs) under steady-state conditions is limited by erosion processes ...
S. Brezinsek, A. Pospieszczyk, G. Sergienko, R. Dux, M. Cavedon, M. Faitsch, K. Krieger   +6 more
doaj   +1 more source

Carbon balance and deuterium inventory from a carbon dominated to a full tungsten ASDEX Upgrade [PDF]

, 2009
The evolution of carbon/boron deposition and the deuterium inventory were determined during the transition from a carbon dominated to a full tungsten ASDEX Upgrade. In the carbon dominated machine about 17 g of carbon were deposited at the inner divertor
Wiltner, A., Hopf, C., Likonen, J., Sugiyama, K., Rohde, V., Mayer, M., Neu, R., Ramos, G., Chen, J.L., ASDEX Upgrade Team, Vainonen-Ahlgren, E., Chen, J., Gong, X., Likonen, Jari; id_orcid, Chen, J. L., Linding, S., Lindig, S.   +16 more
core   +1 more source

Radial transport of poloidal momentum in ASDEX Upgrade in L-mode and H-mode [PDF]

, 2012
A reciprocating probe was used for localized measurements of the radial transport of poloidal momentum in the scrape-off layer (SOL) of ASDEX Upgrade (AUG). The probe measured poloidal and radial electric field components and density.
Schrittwieser, R., Juul Rasmussen, Jens, Rohde, V., Ionita, C., Nielsen, A., ASDEX Upgrade Team, Nielsen, Anders Henry, Müller, H.W., Rasmussen, J., Naulin, V., Nielsen, A. H., Vianello, N., Müller, H. W., Mehlmann, F., Naulin, Volker, Müller, H., Rasmussen, J. J.   +16 more
core  

Disruption Prediction with Adaptive Neural Networks for ASDEX Upgrade

, 2011
In this paper, an adaptive neural system has been built to predict the risk of disruption at ASDEX Upgrade. The system contains a Self Organizing Map, which determines the ‘novelty’ of the input of a Multi Layer Perceptron predictor module.
FANNI, ALESSANDRA, CANNAS, BARBARA, SIAS, GIULIANA, Pautasso G, the ASDEX Upgrade Team   +4 more
core   +1 more source

Characterization and scaling of the tokamak edge transport barrier [PDF]

, 2012
Das Regime mit hohem Einschluss (H-Mode) in einem Tokamak Plasma zeichnet sich durch eine besondere Randregion aus. Auf einem kleinen räumlichen Bereich von 1-2 cm ändern sich die Eigenschaften des Plasmas signifikant.
Schneider, P. ; https://orcid.org/, Schneider, Ph. A., Schneider, Philip Adrian, Schneider, P.   +3 more
core   +1 more source

Radiation transport modelling for the interpretation of oblique ECE measurements

EPJ Web of Conferences, 2017
The electron cyclotron emission (ECE) diagnostic provides routinely electron temperature (Te) measurements. At ASDEX Upgrade an electron cyclotron forward model, solving the radiation transport equation for given Te and electron density profile, is used ...
Denk Severin S., Fischer Rainer, Maj Omar, Poli Emanuele, Stober Jörg K., Stroth Ulrich, Vanovac Branka, Suttrop Wolfgang, Willensdorfer Matthias   +8 more
doaj   +1 more source

L- to H-mode transitions at low density in ASDEX Upgrade [PDF]

, 2011
The results from ASDEX Upgrade discharges dedicated specifically to the investigation of low-density L-to-H transitions are presented. The plasmas were heated by electron cyclotron resonance heating to achieve a separation of electron and ion heat ...
Sauter, P., E. Viezzer, Conway, G. D., S.K. Rathgeber, Fischer, R., R. Fischer, McDermott, R., E. Wolfrum, Rathgeber, S. K., Conway, G., Rathgeber, S., Pütterich, T., T. Pütterich, F. Ryter, P. Sauter, McDermott, R. M., Kurzan, B., ASDEX Upgrade Team, B. Kurzan, Viezzer, E., G.D. Conway, R.M. McDermott, Ryter, F., Wolfrum, E.   +23 more
core   +1 more source

Neural networks for reconstruction and uncertainty quantification of fast-ion phase-space distributions using FILD and INPA measurements

Nuclear Fusion
This study introduces the use of a deep convolutional neural network for reconstructing fast-ion velocity distributions from fast-ion loss detectors and imaging neutral particle analyzers (INPAs), automatically integrating uncertainty quantification ...
B. S. Schmidt, J. Rueda-Rueda, J. Galdon-Quíroga, M. García-Muñoz, P. A. Schneider, M. Salewski, the ASDEX Upgrade Team   +6 more
doaj   +1 more source