Search Results - "EIDIETIS, N"

Demonstration of Tokamak Discharge Shutdown with Shell Pellet Payload Impurity Dispersal by Hollmann, E M, Parks, P B, Shiraki, D, Alexander, N, Eidietis, N W, Lasnier, C J, Moyer, R A

“…The first rapid tokamak discharge shutdown using dispersive core payload deposition with shell pellets has been achieved in the DIII-D tokamak. Shell pellets…”
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Spatiotemporal Evolution of Runaway Electron Momentum Distributions in Tokamaks by Paz-Soldan, C, Cooper, C M, Aleynikov, P, Pace, D C, Eidietis, N W, Brennan, D P, Granetz, R S, Hollmann, E M, Liu, C, Lvovskiy, A, Moyer, R A, Shiraki, D

“…Novel spatial, temporal, and energetically resolved measurements of bremsstrahlung hard-x-ray (HXR) emission from runaway electron (RE) populations in tokamaks…”
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Disruptions in ITER and strategies for their control and mitigation by Lehnen, M., Aleynikova, K., Aleynikov, P.B., Campbell, D.J., Drewelow, P., Eidietis, N.W., Gasparyan, Yu, Granetz, R.S., Gribov, Y., Hartmann, N., Hollmann, E.M., Izzo, V.A., Jachmich, S., Kim, S.-H., Kočan, M., Koslowski, H.R., Kovalenko, D., Kruezi, U., Loarte, A., Maruyama, S., Matthews, G.F., Parks, P.B., Pautasso, G., Pitts, R.A., Reux, C., Riccardo, V., Roccella, R., Snipes, J.A., Thornton, A.J., de Vries, P.C.

“…The thermal and electromagnetic loads related to disruptions in ITER are substantial and require careful design of tokamak components to ensure they reach the…”
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Multiscale Chirping Modes Driven by Thermal Ions in a Plasma with Reactor-Relevant Ion Temperature by Du, X. D., Hong, R. J., Heidbrink, W. W., Jian, X., Wang, H., Eidietis, N. W., Van Zeeland, M. A., Austin, M. E., Liu, Y., Crocker, N. A., Rhodes, T. L., Särkimäki, K., Snicker, A., Wu, W., Knolker, M.

“…A thermal ion driven bursting instability with rapid frequency chirping, considered as an Alfvénic ion temperature gradient mode, has been observed in plasmas…”
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Real-time plasma equilibrium reconstruction and shape control for the MAST Upgrade tokamak by Anand, H., Wehner, W., Eldon, D., Welander, A., Xing, Z., Lvovskiy, A., Barr, J., Cho, E., Sammuli, B., Humphreys, D., Eidietis, N., Leonard, A., Kochan, M., Vincent, C., McArdle, G., Cunningham, G., Thornton, A., Harrison, J., Soukhanovskii, V., Lovell, J.

“…Real-time magnetic control has been developed to deliver precise control of multiple plasma shape parameters for advanced divertor configurations, including…”
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MHD modeling of shattered pellet injection in JET by McClenaghan, J., Lyons, B.C., Kim, C.C., Akçay, C., Eidietis, N., Lao, L.L., Sweeney, R.M., Stein-Lubrano, B., Sheikh, U., Hawkes, N., Szepesi, G.

“…Nonlinear 3D MHD simulations of shattered-pellet injection (SPI) in JET show prototypical SPI-driven disruptions using the M3D-C1 and NIMROD extended-MHD…”
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GATM: A 3-D FE Fusion Magnet Model and Application to DIII-D and Next-generation Devices by Leuer, James A., Weisberg, D., MacDonald, R., Favela, I., Beharrell, Paul, Appelt, D., Buttery, R., Crowe, C., Eidietis, N., Grierson, B., Holland, L., Holtrop, K., Kellman, A., Luxon, James L., Murphy, C., Piec, Z., Sips, G., Zeeland, M. Van, Zalzali, Amani

“…The General Atomics Tokamak Model (GATM) is a recently developed finite element (FE) environment for assessing the performance of tokamak magnet-plasma…”
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Runaway electron plateau current profile reconstruction from synchrotron imaging and Ar-II line polarization angle measurements in DIII-D by Marini, C., Hollmann, E.M., Tang, S.W., Herfindal, J.L., Shiraki, D., Wilcox, R.S., del-Castillo-Negrete, D., Yang, M., Eidietis, N., Hoppe, M.

“…Current profile reconstructions are obtained for high current ( I p ≃ 550 kA) post-disruption runaway electron (RE) plateau plasmas in DIII-D. Two novel…”
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Polarized fusion and potential in situ tests of fuel polarization survival in a tokamak plasma by Baylor, L., Deur, A., Eidietis, N., Heidbrink, W.W., Jackson, G.L., Liu, J., Lowry, M.M., Miller, G.W., Pace, D., Sandorfi, A.M., Smith, S.P., Tafti, S., Wei, K., Wei, X., Zheng, X.

“…The use of spin-polarized fusion fuels would provide a significant boost towards the ignition of a burning plasma. The cross section for D + T → α + n, would…”
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High precision strike point control to support experiments in the DIII-D small angle slot divertor by Eldon, D., Hyatt, A.W., Covele, B., Eidietis, N., Guo, H.Y., Humphreys, D.A., Moser, A.L., Sammuli, B., Walker, M.L.

“…•Improved strike point position control at DIII-D to ±1 mm precision.•Precise control supports experiments in the small angle slot divertor at DIII-D.•Upgraded…”
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Improved fast vertical control in KSTAR by Mueller, D., Hahn, S.H., Eidietis, N., Bak, J.G., Boyer, M.D., Humphreys, D.A., Hyatt, A.W., Jeon, Y.M., Kim, H.S., Walker, M.

“…Fast vertical control of shaped plasmas is essential for the successful realization of plasma operation near the limit of vertical control to achieve maximum…”
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Integrated current profile, normalized beta and NTM control in DIII-D by Pajares, A., Wehner, W.P., Schuster, E., Eidietis, N., Welander, A., La Haye, R., Ferron, J., Barr, J., Walker, M., Humphreys, D., Hyatt, A.

“…•An integrated architecture has been tested in DIII-D by using ONFR as a supervisor.•The proposed architecture enables simultaneous q-profile, beta, and NTM…”
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Advances and challenges in KSTAR plasma control toward long-pulse, high-performance experiments by Hahn, Sang-hee, Han, H., Woo, M.H., Bak, J.G., Chung, J., Jeon, Y.M., Jeong, J.H., Joung, M., Juhn, J.W., Kim, H.S., Kim, Heungsu, Lee, M.W., Shin, G.W., Tak, T.H., Yoon, S.W., Barr, J., Eidietis, N.W., Humphreys, D.A., Hyatt, A., Penaflor, B.G., Piglowski, D.A., Walker, M.L., Welander, A.S., Boyer, M.D., Erickson, K., Mueller, D.

“…An overview of advances and progress on the KSTAR plasma control improvement is given. The enhancement of the KSTAR plasma control system (PCS) continues in…”
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Radiation distribution for shattered pellet injection experiment with AXUV array diagnostics in KSTAR by Jang, Juhyeok, Kim, Jayhyun, Kim, Jaewook, Yoo, Jeongwon, Lehnen, M., Baylor, L.R., Eidietis, N.W., Shiraki, D., Park, Soohwan

“…•The AXUV array diagnostics for shattered pellet injection experiments in KSTAR.•The poloidal AXUV arrays (PAAs) for poloidal cross-sectional radiation…”
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Plasma–surface interactions during tokamak disruptions and rapid shutdowns by Hollmann, E.M., Arnoux, G., Commaux, N., Eidietis, N.W., Evans, T.E., Granetz, R.S., Huber, A., Humphreys, D.A., Izzo, V.A., James, A.N., Jernigan, T.C., Lehnen, M., Maddaluno, G., Paccagnella, R., Parks, P.B., Philipps, V., Reinke, M.L., Rudakov, D.L., Saint-Laurent, F., Sizyuk, V., Strait, E.J., Wesley, J.C., Wong, C.P.C., Yu, J.H.

“…Recent progress in understanding of disruptions and in developing methods to avoid disruption damage is presented. Nearly complete mitigation of conducted heat…”
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New capabilities and upgrade path for the DIII-D neutral beam heating system by Scoville, J.T., Boyer, M.D., Crowley, B.J., Eidietis, N.W., Pawley, C.J., Rauch, J.M.

“…•The DIII-D neutral beam system continues to evolve to provide new capabilities.•Internal beamline components are being upgraded for higher power, longer…”
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Plasma control system for “Day-One” operation of KSTAR tokamak by Hahn, Sang-hee, Walker, M.L., Kim, Kukhee, Ahn, H.S., Penaflor, B.G., Piglowski, D.A., Johnson, R.D., Choi, Jaehoon, Lee, Dong-keun, Kim, Jayhyun, Yoon, S.W., Seo, Seong-Heon, Kim, H.T., Kim, K.P., Lee, T.G., Park, M.K., Bak, J.G., Lee, S.G., Nam, Y.U., Eidietis, N.W., Leuer, J.A., Hyatt, A.W., Jackson, G.L., Mueller, D., Welander, A.S., Abla, G., Humphreys, D.A., Kim, W.C., Oh, Yeong-Kook

“…A complete plasma control system (PCS) has been developed for KSTAR’s first plasma campaign as a collaborative project with the DIII-D team. The KSTAR real…”
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Plasma Startup Design of Fully Superconducting Tokamaks EAST and KSTAR With Implications for ITER by Leuer, J.A., Eidietis, N.W., Ferron, J.R., Humphreys, D.A., Hyatt, A.W., Jackson, G.L., Johnson, R.D., Penaflor, B.G., Piglowski, D.A., Walker, M.L., Welander, A.S., Yoon, S.W., Hahn, S.H., Oh, Y.K., Xiao, B.J., Wang, H.Z., Yuan, Q.P., Mueller, D.

“…Recent commissioning of two major fully superconducting (SC)-shaped tokamaks, Experimental Advanced Superconducting Tokamak (EAST) and Korean Superconducting…”
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TokSearch: A search engine for fusion experimental data by Sammuli, B.S., Barr, J.L., Eidietis, N.W., Olofsson, K.E.J., Flanagan, S.M., Kostuk, M., Humphreys, D.A.

“…At a typical fusion research site, experimental data is stored using archive technologies that deal with each discharge as an independent set of data. These…”
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Achievements and lessons learned from the operation of KSTAR plasma control system upgrade by Hahn, Sang-hee, Penaflor, B.G., Milne, P.G., Bak, J.G., Eidietis, N.W., Han, H., Hong, J.S., Jeon, Y.M., Johnson, R.D., Kim, H.-S., Kim, HeungSu, Kim, Y.J., Kwon, G.I., Lee, W.R., Woo, M.H., Sammuli, B.S., Walker, M.L.

“…Results on the integration and the operation of the KSTAR plasma control system (PCS) upgrade are given. Real-time hardware, new realtime-capable operating…”
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