Search Results - "Menard, J.E"

Stability and transport of gyrokinetic critical pedestals by Parisi, J.F., Nelson, A.O., Guttenfelder, W., Gaur, R., Berkery, J.W., Kaye, S.M., Barada, K., Clauser, C., Diallo, A., Hatch, D.R., Kleiner, A., Lampert, M., Macwan, T., Menard, J.E.

“…Abstract A gyrokinetic threshold model for pedestal width–height scaling prediction is applied to multiple devices. A shaping and aspect ratio scan is…”
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Efficient ECCD non-inductive plasma current start-up, ramp-up, and sustainment for an ST fusion reactor by Ono, M., Berkery, J.W., Bertelli, N., Shiraiwa, S., Delgado-Aparicio, L., Menard, J.E., Sánchez-Villar, Á., Shah, K., Shevchenko, V., Idei, H., Hanada, K.

“…Abstract The elimination of the need for an Ohmic heating solenoid may be the most impactful design driver for the realization of economical compact fusion…”
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Extending the low-recycling, flat temperature profile regime in the lithium tokamak experiment-β (LTX-β) with ohmic and neutral beam heating by Boyle, D.P., Anderson, J., Banerjee, S., Bell, R.E., Capecchi, W., Elliott, D.B., Hansen, C., Kubota, S., LeBlanc, B.P., Maan, A., Maingi, R., Majeski, R., Menard, J.E., Oliva, S., Rhodes, T., Soukhanovskii, V., Zakharov, L.

“…Abstract Recent experiments in the lithium tokamak experiment- β (LTX- β ) have extended the duration, performance, operating conditions, and diagnosis of the…”
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In search of X-point radiator regime features in NSTX and DIII-D discharges with the snowflake divertor by Soukhanovskii, V.A., Allen, S.L., Fenstermacher, M.E., Lasnier, C.J., McLean, A.G., Scotti, F., Kolemen, E., Diallo, A., Gerhardt, S., Kaye, S., LeBlanc, B.P., Maingi, R., Menard, J.E., Raman, R., Hyatt, A.W., Leonard, A.W., Osborne, T.H.

“…Experimental data from NSTX and DIII-D discharges with the snowflake (SF) divertor configurations are analyzed toward the development of the X-point radiator…”
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Advanced divertor configurations with large flux expansion by Soukhanovskii, V.A., Bell, R.E., Diallo, A., Gerhardt, S., Kaye, S., Kolemen, E., LeBlanc, B.P., McLean, A., Menard, J.E., Paul, S.F., Podesta, M., Raman, R., Ryutov, D.D., Scotti, F., Kaita, R., Maingi, R., Mueller, D.M., Roquemore, A.L., Reimerdes, H., Canal, G.P., Labit, B., Vijvers, W., Coda, S., Duval, B.P., Morgan, T., Zielinski, J., De Temmerman, G., Tal, B.

“…Experimental studies of the novel snowflake divertor concept (D. Ryutov, Phys. Plasmas 14 (2007) 064502) performed in the NSTX and TCV tokamaks are reviewed in…”
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Divertor heat flux reduction and detachment experiments in NSTX by Soukhanovskii, V.A., Maingi, R., Bush, C.E., Raman, R., Bell, R.E., Kaita, R., Kugel, H.W., Lasnier, C.J., LeBlanc, B.P., Menard, J.E., Paul, S.F., Roquemore, A.L.

“…We report the first successful experiments at achieving significant outer divertor peak heat flux reduction, from 4–7MW/m2 to 1–2MW/m2, in 4MW NBI-heated…”
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Architectural development of an ST fusion device by Brown, T.G., Menard, J.E.

“…A recent U.S. National Academy study recommended the development of a next step Sustained High Power Density (SHPD) facility within the U.S. as an intermediate…”
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NSTX-U research advancing the physics of spherical tokamaks by Berkery, J.W., Adebayo-Ige, P.O., Al Khawaldeh, H., Avdeeva, G., Baek, S-G., Banerjee, S., Barada, K., Battaglia, D.J., Bell, R.E., Belli, E., Belova, E.V., Bertelli, N., Bisai, N., Bonoli, P.T., Boyer, M.D., Butt, J., Candy, J., Chang, C.S., Clauser, C.F., Corona Rivera, L.D., Curie, M., de Vries, P.C., Diab, R., Diallo, A., Dominski, J., Duarte, V.N., Emdee, E.D., Ferraro, N.M., Fitzpatrick, R., Foley, E.L., Fredrickson, E., Galante, M.E., Gan, K.F., Gerhardt, S., Goldston, R., Guttenfelder, W., Hager, R., Hanson, M.O., Jardin, S.C., Jenkins, T.G., Kaye, S.M., Khodak, A., Kinsey, J., Kleiner, A., Kolemen, E., Ku, S., Lampert, M., Leard, B., LeBlanc, B.P., Lestz, J.B., Levinton, F.M., Liu, C., Looby, T., Lunsford, R., Macwan, T., Maingi, R., McClenaghan, J., Menard, J.E., Munaretto, S., Ono, M., Pajares, A., Parisi, J., Park, J-K., Parsons, M.S., Patel, B.S., Petrov, Y.V., Podestà, M., Poli, F., Porcelli, M., Rafiq, T., Sabbagh, S.A., Sánchez Villar, Á., Schuster, E., Schwartz, J., Sharma, A., Shiraiwa, S., Sinha, P., Smith, D., Smith, S., Soukhanovskii, V.A., Staebler, G., Startsev, E., Stratton, B., Thome, K.E., Tierens, W., Tobin, M., Uzun-Kaymak, I.U., Van Compernolle, B., Wai, J., Wang, W., Wehner, W., Welander, A., Yang, J., Zamkovska, V., Zhang, X., Zhu, X.L., Zweben, S.

“…Abstract The objectives of NSTX-U research are to reinforce the advantages of STs while addressing the challenges. To extend confinement physics of low- A ,…”
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The development of a Sustained High Power Density (SHPD) facility by Brown, T., Menard, J.E., Zhai, Y., Majeski, R., Rana, C., McIntyre, P.

“…A Sustained High Power Density (SHPD) facility is being planned within the U.S. as a non DT device which can be a bridge to a Compact Fusion Pilot Plant (CFPP)…”
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Edge-localized-mode suppression through density-profile modification with lithium-wall coatings in the National Spherical Torus Experiment by Maingi, R, Osborne, T H, Leblanc, B P, Bell, R E, Manickam, J, Snyder, P B, Menard, J E, Mansfield, D K, Kugel, H W, Kaita, R, Gerhardt, S P, Sabbagh, S A, Kelly, F A

“…Reduction or elimination of edge localized modes (ELMs) while maintaining high confinement is essential for future fusion devices, e.g., the ITER. An ELM-free…”
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Observation of plasma toroidal-momentum dissipation by neoclassical toroidal viscosity by Zhu, W, Sabbagh, S A, Bell, R E, Bialek, J M, Bell, M G, LeBlanc, B P, Kaye, S M, Levinton, F M, Menard, J E, Shaing, K C, Sontag, A C, Yuh, H

“…Dissipation of plasma toroidal angular momentum is observed in the National Spherical Torus Experiment due to applied nonaxisymmetric magnetic fields and their…”
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Active control of divertor heat and particle fluxes in EAST towards advanced steady state operations by Wang, L., Guo, H.Y., Li, J., Wan, B.N., Gong, X.Z., Zhang, X.D., Hu, J.S., Liang, Y., Xu, G.S., Zou, X.L., Loarte, A., Maingi, R., Menard, J.E., Luo, G.N., Gao, X., Hu, L.Q., Gan, K.F., Liu, S.C., Wang, H.Q., Chen, R., Sun, Z.

“…Significant progress has been made in EAST towards advanced steady state operations by active control of divertor heat and particle fluxes. Many innovative…”
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“Snowflake” divertor configuration in NSTX by Soukhanovskii, V.A., Ahn, J.-W., Bell, R.E., Gates, D.A., Gerhardt, S., Kaita, R., Kolemen, E., Kugel, H.W., LeBlanc, B.P., Maingi, R., Maqueda, R., McLean, A., Menard, J.E., Mueller, D.M., Paul, S.F., Raman, R., Roquemore, A.L., Ryutov, D.D., Scott, H.A.

“…Steady-state handling of divertor heat flux is a critical issue for present and future conventional and spherical tokamaks with compact high power density…”
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Accelerating the numerical simulation of magnetic field lines in tokamaks using the GPU by Kalling, R.C., Evans, T.E., Orlov, D.M., Schissel, D.P., R.Maingi, Menard, J.E., Sabbagh, S.A.

“…► Tokamak magnetic field lines are simulated on a GPU. ► Numerical integration of a set of nonlinear differential equations is required. ► Using the GPU yields…”
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The enhanced pedestal H-mode in the National Spherical Torus experiment by Maingi, R., Bell, R.E., LeBlanc, B.P., Gates, D.A., Kaye, S.M., Menard, J.E., Sabbagh, S.A., Yuh, H.

“…Typical H-mode pedestal electron and ion temperatures in NSTX range from 100–300 eV. A new operating regime termed the ‘enhanced pedestal’ (EP) H-mode has been…”
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Structure of MARFEs and ELMs in NSTX by Maqueda, R.J., Maingi, R., Tritz, K., Lee, K.C., Bush, C.E., Fredrickson, E.D., Menard, J.E., Roquemore, A.L., Sabbagh, S.A., Zweben, S.J.

“…The fast-evolving structure of MARFEs and ELMs is observed in the National Spherical Torus Experiment (NSTX) using a fast-framing camera. It is shown that Type…”
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Developing snowflake divertor physics basis in the DIII-D, NSTX and NSTX-U tokamaks aimed at the divertor power exhaust solution by Soukhanovskii, V.A., Allen, S.L., Fenstermacher, M.E., Lasnier, C.J., Makowski, M.A., McLean, A.G., Meier, E.T., Meyer, W.H., Rognlien, T.D., Ryutov, D.D., Scotti, F., Kolemen, E., Bell, R.E., Diallo, A., Gerhardt, S., Kaita, R., Kaye, S., LeBlanc, B.P., Maingi, R., Menard, J.E., Podesta, M., Roquemore, A.L., Groebner, R.J., Hyatt, A.W., Leonard, A.W., Osborne, T.H., Petrie, T.W., Ahn, J.-W., Raman, R., Watkins, J.G.

“…Experimental results from the National Spherical Torus Experiment (NSTX), a medium-size spherical tokamak with a compact divertor, and DIII-D, a large…”
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ELMs and the H-mode pedestal in NSTX by Maingi, R., Sabbagh, S.A., Bush, C.E., Fredrickson, E.D., Menard, J.E., Stutman, D., Tritz, K., Bell, M.G., Bell, R.E., Boedo, J.A., Gates, D.A., Johnson, D.W., Kaita, R., Kaye, S.M., Kugel, H.W., LeBlanc, B.P., Mueller, D., Raman, R., Roquemore, A.L., Soukhanovskii, V.A., Stevenson, T.

“…We report on the behavior of ELMs in NBI-heated H-mode plasmas in NSTX. It is observed that the size of Type I ELMs, characterized by the change in plasma…”
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Status of the control system on the National Spherical Torus Experiment (NSTX) by Gates, D.A., Ferron, J.R., Bell, M., Gibney, T., Johnson, R., Marsala, R.J., Mastrovito, D., Menard, J.E., Mueller, D., Neumeyer, C., Penaflor, B., Stevenson, T.

“…In 2003, the National Spherical Torus Experiment (NSTX) plasma control system was used for plasma shape control using real-time equilibrium reconstruction…”
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Storage and analysis techniques for fast 2D camera data on NSTX by Davis, W.M., Mastrovito, D.M., Bush, C.E., Gates, D.A., Maqueda, R.J., Menard, J.E., Nishino, N., Roney, P.G., Roquemore, A.L., Sabbagh, S., Stratton, B.C., Zweben, S.J.

“…Animations from fast 2D camera data are facilitating the investigation of spatially distributed phenomena in high-temperature plasmas. The National Spherical…”
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