Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Richard J. Groebner"'
Autor:
Gabriele Merlo, Michael Kotschenreuther, Ehab Hassan, Andrew Nelson, Richard J. Groebner, David Hatch, Swadesh M Mahajan, Michael Halfmoon, Ahmed Diallo, Max Curie
Publikováno v:
Nuclear Fusion. 62:026008
Recent evidence points toward the microtearing mode (MTM) as an important fluctuation in the H-mode pedestal for anomalous electron heat transport. A study of the instabilities in the pedestal region carried out using gyrokinetic simulations to model
Autor:
Ahmed Diallo, Lei Zeng, Richard J. Groebner, Kshitish Barada, P. B. Snyder, Tom Osborne, Saskia Mordijck, Brian Grierson, Santanu Banerjee, Terry Rhodes
Publikováno v:
Nuclear Fusion. 61:056008
In DIII-D, it has been observed that ELM frequency decreases by 40% and ELM spacing becomes more regular in time when heating is changed from pure neutral beam injection (NBI) to predominantly electron cyclotron heating (ECH) in ITER similar shape pl
Autor:
Scott Kruger, J. R. Jepson, Richard J. Groebner, J.D. Hebert, Jacob King, Eric Held, James D. Hanson
Methods are described that extend fields from reconstructed equilibria to include scrape-off-layer current through extrapolated parametrized and experimental fits. The extrapolation includes both the effects of the toroidal-field and pressure gradien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d74dd89eedfb62f0b214b1849c0d3250
Autor:
K. H. Burrell, A.M. Garofalo, P. B. Snyder, Richard J. Groebner, Alexei Pankin, Scott Kruger, Jacob King
The extended-MHD NIMROD code [C.R. Sovinec and J.R. King, J. Comput. Phys. 229, 5803 (2010)] models broadband-MHD activity from a reconstruction of a quiescent H-mode shot on the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)]. Computations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2bf05c1c5da4327d01e3d0286a747cb
Autor:
P. B. Snyder, K. H. Burrell, Xi Chen, Jacob King, K.E.J. Olofsson, Alexei Pankin, Richard J. Groebner, A.M. Garofalo, Scott Kruger
Extended-MHD modeling of DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] quiescent H-mode (QH-mode) discharges with nonlinear NIMROD [C. R. Sovinec et al., J. Comput. Phys. 195, 355 (2004)] simulations saturates into a turbulent state but d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa6bca853bd1aacbbaef3372f23fca42
Autor:
Patrick Diamond, Tuomas Tala, Clinton C. Petty, X. Wang, Richard J. Groebner, Saskia Mordijck, Won-Ha Ko, Brian Grierson, George McKee, Antti Salmi, W. M. Solomon, G. M. Staebler, E. J. Doyle, Lei Zeng, Lothar Schmitz, Terry Rhodes, Colin Chrystal
Publikováno v:
Mordijck, S, Wang, X, Doyle, E J, Rhodes, T L, Schmitz, L, Zeng, L, Staebler, G M, Petty, C C, Groebner, R J, Ko, W H, Grierson, B A, Solomon, W M, Tala, T, Salmi, A, Chrystal, C, Diamond, P H & McKee, G R 2015, ' Particle transport in low-collisionality H-mode plasmas on DIII-D ', Nuclear Fusion, vol. 55, no. 11, 113025 . https://doi.org/10.1088/0029-5515/55/11/113025
Nuclear Fusion, vol 55, iss 11
Mordijck, S; Wang, X; Doyle, EJ; Rhodes, TL; Schmitz, L; Zeng, L; et al.(2015). Particle transport in low-collisionality H-mode plasmas on DIII-D. Nuclear Fusion, 55(11). doi: 10.1088/0029-5515/55/11/113025. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/35d335jr
Nuclear Fusion, vol 55, iss 11
Mordijck, S; Wang, X; Doyle, EJ; Rhodes, TL; Schmitz, L; Zeng, L; et al.(2015). Particle transport in low-collisionality H-mode plasmas on DIII-D. Nuclear Fusion, 55(11). doi: 10.1088/0029-5515/55/11/113025. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/35d335jr
© 2015 IAEA, Vienna. In this paper we show that changing from an ion temperature gradient (ITG) to a trapped electron mode (TEM) dominant turbulence regime (based on linear gyrokinetic simulations) results experimentally in a strong density pump-out
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd1067095944e96f941f1ab831e2b4b5
https://cris.vtt.fi/en/publications/0fd0d3ff-9479-40b1-9828-d296382fb60a
https://cris.vtt.fi/en/publications/0fd0d3ff-9479-40b1-9828-d296382fb60a
Autor:
J.L. Terry, J. W. Hughes, D. Brunner, Brian LaBombard, Arnold H. Kritz, Alexei Pankin, G. Y. Park, Richard J. Groebner, Tariq Rafiq, Seung-Hoe Ku, Choong-Seock Chang
The guiding-center kinetic neoclassical transport code, XGC0, [C.S. Chang et. al, Phys. Plasmas 11, 2649 (2004)] is used to compute the heat fluxes and the heat-load width in the outer divertor plates of Alcator C-Mod and DIII-D tokamaks. The depende
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::151e66334c334582b1d8552b11e0a4c8
Autor:
Todd Evans, George McKee, James D. Callen, Nathaniel Ferraro, M. Okabayashi, R.A. Moyer, Richard J. Groebner, Tom Osborne, J. D. King, Dmitry M. Orlov, Terry Rhodes, David Eldon, W. M. Solomon, J.S. deGrassie, Chris Hegna, Jong-Kyu Park, P. B. Snyder, M. R. Wade, Nikolas Logan, Brian Grierson, Morgan Shafer, Edward Strait, Raffi Nazikian, Carlos Paz-Soldan, Shaun Haskey
Publikováno v:
Physical review letters. 114(10)
Rapid bifurcations in the plasma response to slowly varying n=2 magnetic fields are observed as the plasma transitions into and out of edge-localized mode (ELM) suppression. The rapid transition to ELM suppression is characterized by an increase in t
Publikováno v:
Review of Scientific Instruments. 75:3481-3486
An approach has been implemented on the DIII-D tokamak to allow the correct determination of the plasma poloidal velocity from charge exchange spectroscopy measurements. Unlike usual techniques, the need for detailed atomic physics calculations to pr
Publikováno v:
Review of Scientific Instruments. 74:5084-5089
An experimental technique is presented that permits diagnostics viewing light from the plasma edge to be spatially calibrated relative to one another. By sweeping the plasma edge, each chord of each diagnostic sweeps out a portion of the light emissi