Zobrazeno 1 - 10 of 64 pro vyhledávání: '"D. S. GRAY"'
1
Gas jet disruption mitigation studies on Alcator C-Mod and DIII-D
Autor: J.H. Yu, Dmitry Rudakov, M. Groth, Matthew Reinke, T.C. Jernigan, E. J. Strait, V.A. Izzo, E. M. Hollmann, Ian H. Hutchinson, G. Antar, D.G. Whyte, J.L. Terry, D. S. Gray, J.C. Wesley, W.P. West, A. Bader, Todd Evans, R.A. Moyer, J.A. Boedo, Mohammad Reza Bakhtiari, T. M. Biewer, G. A. Wurden, C.J. Lasnier, P. B. Parks, Robert Granetz, David Humphreys
Publikováno v: Nuclear Fusion. 47:1086-1091
High-pressure noble gas jet injection is a mitigation technique which potentially satisfies the requirements of fast response time and reliability, without degrading subsequent discharges. Previously reported gas jet experiments on DIII-D showed good
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::780221355fec70e5a5161a39bbdfc8d4
https://doi.org/10.1088/0029-5515/47/9/003
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2
Measurements of impurity and heat dynamics during noble gas jet-initiated fast plasma shutdown for disruption mitigation in DIII-D
Autor: Adam McLean, Dmitry Rudakov, D.G. Whyte, P. B. Parks, W.P. West, David Humphreys, M. Groth, N.H. Brooks, C.J. Lasnier, E. J. Strait, E. M. Hollmann, D. P. Brennan, R.A. Moyer, D. S. Gray, Max E Austin, T.C. Jernigan, V. A. Rozhansky, B.D. Bray, Todd Evans
Publikováno v: Nuclear Fusion. 45:1046-1055
Impurity deposition and mixing during gas jet-initiated plasma shutdown is studied using a rapid ({approx}2 ms), massive ({approx}10{sup 22} particles) injection of neon or argon into stationary DIII-D H-mode discharges. Fast-gated camera images indi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0de15e7f016c8f833a99b80a832fcaf7
https://doi.org/10.1088/0029-5515/45/9/003
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3
Effect of B-field dependent particle drifts on ELM behavior in the DIII-D boundary plasma
Autor: M.E. Fenstermacher, Eric Hollmann, C.J. Lasnier, N.H. Brooks, M. Groth, D. S. Gray, J.A. Boedo, T.W. Petrie, A.W. Leonard, Lei Zeng, G.D. Porter
Publikováno v: Journal of Nuclear Materials. :781-785
Edge localized mode (ELM) effects in the DIII-D pedestal and boundary plasmas were measured with multiple fast diagnostics in matched, lower single-null, ELMing H-mode discharges with the ion B × ∇B drift either toward or away from the divertor. D
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9e79fee8d34dc987e88aae4b889a76f0
https://doi.org/10.1016/j.jnucmat.2004.10.086
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4
The Toroidal Pump Limiter ALT-II in TEXTOR
Autor: T. Denner, R.A. Moyer, J.A. Boedo, K. H. Dippel, J. G. Watkins, R.P. Doerner, R.T. McGrath, G. Mank, J. Hogan, D. Goebel, W. J. Corbett, K. H. Finken, T. Shoji, K. Akaishi, A. Miyahara, M. Matsunaga, D. L. Hillis, Jeffrey N. Brooks, R.E. Nygren, Robert W. Conn, G.H. Wolf, H. Kever, N. Noda, K. N. Sato, Detlev Reiter, J. Hobirk, D. S. Gray
Publikováno v: Fusion science and technology 47, 126-137 (2005).
The Advanced Limiter Test (ALT) project is the focus of a fruitful and intense International Energy Agreement collaboration on TEXTOR. The pump limiter is a mechanical boundary that is laid out for taking the full heat load of TEXTOR, namely 8 MW (as
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::212e6c41b36292bdbab930623732b4d5
https://doi.org/10.13182/fst05-a694
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5
ELM particle and energy transport in the SOL and divertor of DIII-D
Autor: M E Fenstermacher, A W Leonard, P B Snyder, J A Boedo, N H Brooks, R J Colchin, D S Gray, R J Groebner, M Groth, E Hollmann, C J Lasnier, T H Osborne, T W Petrie, D L Rudakov, H Takahashi, J G Watkins, L Zeng, the DIII-D Team
Publikováno v: Plasma Physics and Controlled Fusion. 45:1597-1626
Results from a series of dedicated experiments measuring the effect of particle and energy pulses from Type-I edge localized modes (ELMs) in the DIII-D scrape-off layer (SOL) and divertor are compared with a simple model of ELM propagation in the bou
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86378f3678cd4008ce4e9717789d7699
https://doi.org/10.1088/0741-3335/45/9/304
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6
Radiated power measurement during the thermal quench phase of a density limit disruption
Autor: A. Yu. Pigarov, Eric Hollmann, J.A. Boedo, D. S. Gray, D.A. Humphreys, Dennis Whyte, Sergei Krasheninnikov
Publikováno v: Physics of Plasmas. 10:2863-2870
Radiated power measurements taken during the thermal quench of a density limit disruption in the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] demonstrate that ten times more power is radiated from the main chamber than is deposited into
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28ff8d8bf79eea1af69e0da9e61692f2
https://doi.org/10.1063/1.1583713
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7
Disruption mitigation with high-pressure noble gas injection
Autor: David Humphreys, A.G. Kellman, P. L. Taylor, P. B. Parks, Todd Evans, E. M. Hollmann, Dennis Whyte, D. S. Gray, T. C. Jernigan, Charles Lasnier, A.W. Hyatt
Publikováno v: Journal of Nuclear Materials. :1239-1246
High-pressure gas jets of neon and argon are used to mitigate the three principal damaging effects of tokamak disruptions: thermal loading of the divertor surfaces, vessel stress from poloidal halo currents and the buildup and loss of relativistic el
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dea68b51980123877a650c95595ef510
https://doi.org/10.1016/s0022-3115(02)01525-8
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8
High time-resolved, 2D imaging of type-I ELMs in DIII-D using a image-intensified CID camera
Autor: N.H. Brooks, G.D. Porter, A.W. Leonard, J.G. Watkins, M.E. Fenstermacher, D. S. Gray, J.A. Boedo, M. Groth, C.J. Lasnier
Publikováno v: Journal of Nuclear Materials. :1071-1075
The evolution of 2D emission profiles of D-alpha and C III during type-I edge localised modes (ELMs) has been investigated in DIII-D using a tangentially viewing gated, intensified charge-injected device (CID) camera. The measured CIII emission profi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::583c6a5a7b8b3050fbcb1d804a949105
https://doi.org/10.1016/s0022-3115(02)01539-8
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9
Scaling of plasma turbulence suppression with velocity shear
Autor: Paul Terry, Jose Boedo, D. S. Gray, Textor Team, George Tynan, Robert W. Conn, S. Jachmich
Publikováno v: Nuclear Fusion. 42:117-121
The scaling of plasma turbulence, turbulent particle flux and cross-phase with shear in the edge of the TEXTOR-94 tokamak is obtained from measurements from fast scanning probes and compared with various existing analytical theories. It is found that
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::148e457792a750b1e010b410af53c990
https://doi.org/10.1088/0029-5515/42/2/301
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10
Enhanced particle confinement and turbulence reduction due toE Bshear in the TEXTOR tokamak
Autor: D. S. Gray, J.A. Boedo, G.P. Terry, George Tynan, Textor Team, Robert W. Conn, G. Van Oost, S. Jachmich, R.R. Weynants
Publikováno v: Nuclear Fusion. 40:1397-1410
Positive radial electric fields have been created at the edge of the TEXTOR tokamak plasma using an electrode. The electric field induces a thin (δr~1.5 cm), E × B driven layer at the edge rotating poloidally at 12-20 km/s and featuring high shear.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23b343cac6d4dcc3315c4d9a1f15dae2
https://doi.org/10.1088/0029-5515/40/7/309
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