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of 192
pro vyhledávání: '"Howard, N. T."'
Burning plasma performance, transport, and the effect of hydrogen isotope on confinement has been predicted for ITER baseline scenario (IBS) conditions using nonlinear gyrokinetic profile predictions. Accelerated by surrogate modeling [P. Rodriguez-F
Externí odkaz:
http://arxiv.org/abs/2404.17040
Autor:
Rodriguez-Fernandez, P., Howard, N. T., Saltzman, A., Shoji, L., Body, T., Battaglia, D. J., Hughes, J. W., Candy, J., Staebler, G. M., Creely, A. J.
This work characterizes the core transport physics of SPARC early-campaign plasmas using the PORTALS-CGYRO framework. Empirical modeling of SPARC plasmas with L-mode confinement indicates an ample window of breakeven (Q>1) without the need of H-mode
Externí odkaz:
http://arxiv.org/abs/2403.15633
Autor:
Rodriguez-Fernandez, P., Howard, N. T., Saltzman, A., Kantamneni, S., Candy, J., Holland, C., Balandat, M., Ament, S., White, A. E.
This work presents the PORTALS framework, which leverages surrogate modeling and optimization techniques to enable the prediction of core plasma profiles and performance with nonlinear gyrokinetic simulations at significantly reduced cost, with no lo
Externí odkaz:
http://arxiv.org/abs/2312.12610
Autor:
Di Siena, A., Rodriguez-Fernandez, P., Howard, N. T., Navarro, A. Banon, Bilato, R., Goerler, T., Poli, 1 E., Merlo, G., Wrigh, J., Greenwald, M., Jenko, F.
The recent progress in high-temperature superconductor technologies has led to the design and construction of SPARC, a compact tokamak device expected to reach plasma breakeven with up to $25$MW of external ion cyclotron resonant heating (ICRH) power
Externí odkaz:
http://arxiv.org/abs/2210.11816
Autor:
Ruiz, J. Ruiz, Parra, F. I., Hall-Chen, V. H., Christen, N., Barnes, M., Candy, J., Garcia, J., Giroud, C., Guttenfelder, W., Hillesheim, J. C., Holland, C., Howard, N. T., Ren, Y., White, A. E., contributors., JET
A linear response, local model for the DBS amplitude applied to gyrokinetic simulations shows that radial correlation Doppler reflectometry measurements (RCDR, Schirmer et al., Plasma Phys. Control. Fusion 49 1019 (2007)) are not sensitive to the ave
Externí odkaz:
http://arxiv.org/abs/2201.06324
Autor:
Sciortino, F., Howard, N. T., Reksoatmodjo, R., Foster, A. R., Hughes, J. W., Marmar, E. S., Miller, M. A., Mordijck, S., Odstrcčil, T., Pütterich, T., Reinke, M. L., Rice, J. E., Rodriguez-Fernandez, P.
We present experimental inferences of cross-field impurity transport coefficients for Alcator C-Mod plasmas using a novel forward model for the entire Ca K-alpha spectrum, including satellite lines within the spectral range, to compare to high-resolu
Externí odkaz:
http://arxiv.org/abs/2107.13471
Autor:
Sciortino, F., Odstrčil, T., Cavallaro, A., Smith, S., Meneghini, O., Reksoatmodjo, R., Linder, O., Lore, J. D., Howard, N. T., Marmar, E. S., Mordijck, S.
We present Aurora, an open-source package for particle transport, neutrals and radiation modeling in magnetic confinement fusion plasmas. Aurora's modern multi-language interface enables simulations of 1.5D impurity transport within high-performance
Externí odkaz:
http://arxiv.org/abs/2106.04528
Autor:
Sciortino, F., Howard, N. T., Marmar, E. S., Odstrcil, T., Cao, N. M., Dux, R., Hubbard, A. E., Hughes, J. W., Irby, J. H., Marzouk, Y., Milanese, L. M., Reinke, M. L., Rice, J. E., Rodriguez-Fernandez, P.
We present a fully Bayesian approach for the inference of radial profiles of impurity transport coefficients and compare its results to neoclassical, gyrofluid and gyrokinetic modeling. Using nested sampling, the Bayesian Impurity Transport InferencE
Externí odkaz:
http://arxiv.org/abs/2006.06798
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Autor:
Fülöp, T., Helander, P., Vallhagen, O., Embréus, O., Hesslow, L., Svensson, P., Creely, A. J., Howard, N. T., Rodriguez-Fernandez, P.
Plasma terminating disruptions in tokamaks may result in relativistic runaway electron beams with potentially serious consequences for future devices with large plasma currents. In this paper we investigate the effect of plasma elongation on the coup
Externí odkaz:
http://arxiv.org/abs/1909.13707