Results 21 to 30 of about 389 (146)

Experiences with a solid tungsten divertor in ASDEX Upgrade

Nuclear Materials and Energy, 2017
In 2013 a redesigned solid tungsten divertor, Div-III, was installed in ASDEX Upgrade. In two experimental campaigns more than 2700 plasma discharges with up to 10s duration, 110MJ plasma heating, and reaching a Psep/R of 10MW/m were conducted.
A. Herrmann, I. Zammuto, M. Balden, H. Greuner, N. Jaksic, A. Kallenbach, M. Li, R. Neu, V. Rohde   +8 more
doaj   +1 more source

Induced microwave scattering in the ITER edge transport barrier at ECRH and possibility of its modeling at ASDEX-Upgrade [PDF]

EPJ Web of Conferences, 2023
The induced scattering parametric decay instability of O-mode polarized microwaves leading to excitation of lower hybrid or electron plasma waves localized within a tokamak edge transport barrier is investigated.
Gusakov Evgeniy, Popov Alexei, Irzak Michael   +2 more
doaj   +1 more source

Pellet-fueled I-mode plasmas in ASDEX Upgrade

Nuclear Fusion, 2023
This letter reports on the efforts carried out at the ASDEX Upgrade tokamak to integrate I-mode plasmas with pellet fueling and to increase the I-mode Greenwald fraction $f_{\mathrm{GW}}$ , two important requirements for any DEMO operational scenario ...
D. Silvagni, P.T. Lang, T. Happel, A. Bock, R. Fischer, L. Gil, O.J.W.F. Kardaun, R.M. McDermott, U. Plank, B. Plöckl, D. Stieglitz, G. Tardini, the ASDEX Upgrade Team   +12 more
doaj   +1 more source

Upgrading the ICRF data acquisition system at ASDEX Upgrade [PDF]

AIP Conference Proceedings, 2014
The ICRF system at ASDEX Upgrade has proved to be very flexible in use, from high power heating down to moderate or low power levels needed for vessel conditioning. As a consequence of these wide varieties of applications the present capabilities of the data acquisition system became a limiting factor, as the CAMAC system could only record up to about ...
H. Faugel, V. Bobkov, H. Eixenberger, Y. Podoba, I. Stepanov, null ASDEX Upgrade Team   +5 more
openaire   +2 more sources

Experimental evidence of magnetic flux pumping in ASDEX upgrade

Nuclear Fusion, 2023
In high- β scenarios with on-axis co-current electron cyclotron current drive, which normally lowers q _0 below unity, the absence of sawteeth suggests the involvement of an additional current redistribution mechanism beyond neoclassical current ...
A. Burckhart, A. Bock, R. Fischer, T. Pütterich, J. Stober, S. Günter, A. Gude, J. Hobirk, M. Hölzl, V. Igochine, I. Krebs, M. Maraschek, M. Reisner, R. Schramm, H. Zohm, the ASDEX Upgrade Team   +15 more
doaj   +1 more source

Surface features of strongly heated bulk tungsten divertor plates at ASDEX Upgrade

Nuclear Materials and Energy, 2023
Solid tungsten tiles exposed at the outer strike point module of the ASDEX Upgrade divertor show cracks parallel to surface in the bulk and humps at the surface. At ASDEX Upgrade these horizontal cracks were observed for the first time. About 10 % of all
V. Rohde, M. Balden, K. Hunger, I. Zammuto, A. Herrmann, R. Neu   +5 more
doaj   +1 more source

Safety Analysis in Large Volume Vacuum Systems Like Tokamak: Experiments and Numerical Simulation to Analyze Vacuum Ruptures Consequences

Advances in Materials Science and Engineering, Volume 2014, Issue 1, 2014., 2014
The large volume vacuum systems are used in many industrial operations and research laboratories. Accidents in these systems should have a relevant economical and safety impact. A loss of vacuum accident (LOVA) due to a failure of the main vacuum vessel can result in a fast pressurization of the vessel and consequent mobilization dispersion of ...
A. Malizia, I. Lupelli, M. Richetta, M. Gelfusa, C. Bellecci, P. Gaudio, S. K. S. Parashar   +6 more
wiley   +1 more source

Feedback-controlled NTM stabilization on ASDEX Upgrade

EPJ Web of Conferences, 2015
On ASDEX Upgrade a concept for real-time stabilization of NTMs has been realized and successfully applied to (3,2)- and (2,1)-NTMs. Since most of the work has meanwhile been published elsewhere, a short summary with the appropriate references is given ...
Stober J., Barrera L., Behler K., Bock A., Buhler A., Eixenberger H., Giannone L., Kasparek W., Maraschek M., Mlynek A., Monaco F., Poli E., Rapson C.J., Reich M., Schubert M., Treutterer W., Wagner D., Zohm H.   +17 more
doaj   +1 more source

The compact neutron spectrometer at ASDEX Upgrade [PDF]

Review of Scientific Instruments, 2011
The first neutron spectrometer of ASDEX Upgrade (AUG) was installed in November 2008. It is a compact neutron spectrometer (CNS) based on a BC501A liquid scintillating detector, which can simultaneously measure 2.45-MeV and 14-MeV neutrons emitted from deuterium (D) plasmas and γ radiation. The scintillating detector is coupled to a digital pulse shape
Giacomelli, L., Zimbal, A., Tittelmeier, K., Schuhmacher, H., Tardini, G., Neu, R., ASDEX Upgrade Team   +6 more
openaire   +4 more sources

Surface loss probabilities of boron-hydride radicals in W7-X and ASDEX Upgrade

Nuclear Materials and Energy
The surface loss probabilities of boron-hydride radicals on silicon surfaces have been measured during boronisations for wall conditioning in the stellarator W7-X and the tokamak ASDEX Upgrade using the cavity technique.
M. Mayer, S. An, T. Bräuer, D. Cipciar, C.P. Dhard, C. Killer, D. Naujoks, V. Rohde, R. Steinwehr, U. von Toussaint, L. Vano, H. Viebke   +11 more
doaj   +1 more source