Results 21 to 30 of about 20,009 (190)

Carbonization of the DIII-D tokamak [PDF]

Journal of Nuclear Materials, 1990
The DIII-D tokamak has been carbonized by the application of a carbon film covering all plasma facing surfaces. Carbonization was done in order to reduce the metal impurity influx and central metal accumulation especially during beam heated D{sup O} {yields} D{sup +} H-mode discharges.
G.L. Jackson, J. Winter, S. Lippmann, T.W. Petrie, J.C. Deboo, D.P. Schissel, T.S. Taylor   +6 more
openaire   +1 more source

Fast-ion redistribution and loss due to edge perturbations in the ASDEX Upgrade, DIII-D and KSTAR tokamaks [PDF]

, 2013
The impact of edge localized modes (ELMs) and externally applied resonant and non-resonant magnetic perturbations (MPs) on fast-ion confinement/transport have been investigated in the ASDEX Upgrade (AUG), DIII-D and KSTAR tokamaks.
Asunta, O., Boom, J., Chen, X., Classen, I.G.J., Dux, R., Evans, T.E., Fietz, S., Fisher, R.K., Fuchs, C., García Muñoz, Manuel, Geiger, B., Hoelzl, M., Igochine, V., Jeon, Y.M., Kim, J., Kim, J.Y., Kurzan, B., Lazanyi, N., Lunt, T., McDermott, R. M., Nocente, M., Pace, D.C., Rhodes, T.L., Rodríguez Ramos, Mauricio, Shinohara, K., Suttrop, W., Viezzer, Eleonora, Willensdorfer, M., Wolfrum, E., Zeeland, M.A. van, Äkäslompolo, S.   +30 more
core   +1 more source

Validating the Multi-Mode Model’s Ability to Reproduce Diverse Tokamak Scenarios

Plasma, 2023
A large-scale validation exercise was conducted to assess the multi-mode model (MMM) anomalous transport model in the integrated modeling code TRANSP. The validation included 6 EAST discharges, 17 KSTAR discharges, 72 JET ITER-like wall D-D discharges ...
Tariq Rafiq, Zibo Wang, Shira Morosohk, Eugenio Schuster, Jan Weiland, Wilkie Choi, Hyun-Tae Kim   +6 more
doaj   +1 more source

Benchmarking UEDGE with DIII‐D Data [PDF]

Contributions to Plasma Physics, 1994
AbstractComparisons between a 2‐D fluid simulation of the SOL plasma of a diverted tokamak and experimental data from the DIII‐D are shown. It is concluded that a simple diffusive model for perpendicular transport is consistent with the data. Discrepancies in the simulation suggest that impurity radiation may be playing a significant role in the ...
Porter, G. D., Fenstermacher, M., Rensink, M. E., Rognlien, T. D., Groebner, R., Leonard, A., Nguyen, Q.   +6 more
openaire   +1 more source

Performance History and Upgrades for the DIII-D Gyrotron Complex

EPJ Web of Conferences, 2015
The gyrotron installation on the DIII-D tokamak has been in operation at the second harmonic of the electron cyclotron resonance since the mid-1990s. Prior to that a large installation of ten 60 GHz tubes was operated at the fundamental resonance.
Lohr J., Anderson J.P., Cengher M., Ellis R.A., Gorelov Y.A., Kolemen E., Lambot T., Murakami D.D., Myrabo L., Noraky S., Parkin K.L., Ponce D., Torrezan A.   +12 more
doaj   +1 more source

DIII-D research operations [PDF]

, 1993
This report discusses the research on the following topics: DIII-D program overview; divertor and boundary research program; advanced tokamak studies; tokamak physics; operations; program development; support services; contribution to ITER physics R D; and collaborative efforts.
openaire   +2 more sources

Density limit studies on DIII-D [PDF]

Journal of Nuclear Materials, 1999
Abstract We have studied the processes limiting plasma density and successfully achieved discharges with density ∼50% above the empirical Greenwald scaling with H-mode energy confinement. This was accomplished by density profile control, enabled through pellet injection and divertor pumping.
R. Maingi, M.A. Mahdavi, T.W. Petrie, L.R. Baylor, T.C. Jernigan, R.J. La Haye, A.W. Hyatt, M.R. Wade, J.G. Watkins, D.G. Whyte   +9 more
openaire   +1 more source

ELM regime classification by conformal prediction on an information manifold [PDF]

, 2015
Characterization and control of plasma instabilities known as edge-localized modes (ELMs) is crucial for the operation of fusion reactors. Recently, machine learning methods have demonstrated good potential in making useful inferences from stochastic ...
Murari, Andrea, Shabbir, Aqsa, Vega, Jesus, Verdoolaege, Geert   +3 more
core   +2 more sources

Supplemental ELM control in ITER through beryllium granule injection

Nuclear Materials and Energy, 2019
Injection of low-Z granules into high performance discharges on DIII-D has been shown to promptly trigger Edge Localized Modes (ELMs) providing high-Z impurity control without significant plasma degradation.
R. Lunsford, A. Bortolon, R. Maingi, D.K. Mansfield, A. Nagy, G.L. Jackson, T. Osborne   +6 more
doaj   +1 more source

Trends in runaway electron plateau partial recombination by massive H2 or D2 injection in DIII-D and JET and first extrapolations to ITER and SPARC

Nuclear Fusion, 2023
Experimental trends in thermal plasma partial recombination resulting from massive ${{\text{D}}_2}$ injection into high-Z (Ar) containing runaway electron (RE) plateaus in DIII-D and JET are studied for the purpose of achieving sufficiently low electron ...
E.M. Hollmann, L. Baylor, A. Boboc, P. Carvalho, N.W. Eidietis, J.L. Herfindal, S. Jachmich, A. Lvovskiy, C. Paz-Soldan, C. Reux, D. Shiraki, R. Sweeney, JET Contributors   +12 more
doaj   +1 more source