Zobrazeno 1 - 10
of 1 291
pro vyhledávání: '"Parra F"'
Autor:
Parra, F. I., Baek, S. -G., Churchill, M., Demers, D. R., Dudson, B., Ferraro, N. M., Geiger, B., Gerhardt, S., Hammond, K. C., Hudson, S., Jorge, R., Kolemen, E., Kriete, D. M., Kumar, S. T. A., Landreman, M., Lowe, C., Maurer, D. A., Nespoli, F., Pablant, N., Pueschel, M. J., Punjabi, A., Schwartz, J. A., Swanson, C. P. S., Wright, A. M.
We propose to build a Flexible Stellarator Physics Facility to explore promising regions of the vast parameter space of disruption-free stellarator solutions for Fusion Pilot Plants (FPPs).
Comment: White paper submitted to FESAC subcommittee on
Comment: White paper submitted to FESAC subcommittee on
Externí odkaz:
http://arxiv.org/abs/2407.04039
In omnigeneous magnetic fields, charged particles are perfectly confined in the absence of collisions and turbulence. For this reason, the magnetic configuration is optimized to be close to omnigenity in any candidate for a stellarator fusion reactor
Externí odkaz:
http://arxiv.org/abs/2405.07634
MONKES is a new neoclassical code for the evaluation of monoenergetic transport coefficients in stellarators. By means of a convergence study and benchmarks with other codes, it is shown that MONKES is accurate and efficient. The combination of spect
Externí odkaz:
http://arxiv.org/abs/2312.12248
Autor:
Parisi, J. F., Nelson, A. O., Gaur, R., Kaye, S. M., Parra, F. I., Berkery, J. W., Barada, K., Clauser, C., Creely, A. J., Diallo, A., Guttenfelder, W., Hughes, J. W., Kogan, L. A., Kleiner, A., Kuang, A. Q., Lampert, M., Macwan, T., Menard, J. E., Miller, M. A.
Publikováno v:
Phys. Plasmas 31, 030702 (2024)
We use a new gyrokinetic threshold model to predict a bifurcation in tokamak pedestal width-height scalings that depends strongly on plasma shaping and aspect-ratio. The bifurcation arises from the first and second stability properties of kinetic-bal
Externí odkaz:
http://arxiv.org/abs/2312.05216
Autor:
Podavini, L., Zocco, A., García-Regaña, J. M., Barnes, M., Parra, F. I., Mishchenko, A., Helander, P.
Electrostatic gyrokinetic instabilities and turbulence in the Wendelstein 7-X stellarator are studied. Particular attention is paid to the ion-temperature-gradient (ITG) instability and its character close to marginal stability [Floquet-type turbulen
Externí odkaz:
http://arxiv.org/abs/2311.04342
Autor:
Parisi, J. F., Guttenfelder, W., Nelson, A. O., Gaur, R., Kleiner, A., Lampert, M., Avdeeva, G., Berkery, J. W., Clauser, C., Curie, M., Diallo, A., Dorland, W., Kaye, S. M., McClenaghan, J., Parra, F. I.
A theoretical model is presented that for the first time matches experimental measurements of the pedestal width-height Diallo scaling in the low-aspect-ratio high-$\beta$ tokamak NSTX. Combining linear gyrokinetics with self-consistent pedestal equi
Externí odkaz:
http://arxiv.org/abs/2308.05238
Publikováno v:
Nucl. Fusion 63 126038 (2023)
Stellarator magnetic configurations need to be optimized in order to meet all the required properties of a fusion reactor. In this work, it is shown that a flat-mirror quasi-isodynamic configuration (i.e. a quasi-isodynamic configuration with suffici
Externí odkaz:
http://arxiv.org/abs/2306.17506
A systematic study of the impact of impurities on the turbulent heat fluxes is presented for the stellarator Wendelstein 7-X (W7-X) and, for comparison, the Large Helical Device and ITER. By means of nonlinear multispecies gyrokinetic simulations, it
Externí odkaz:
http://arxiv.org/abs/2305.16805
Autor:
Hardman, M. R., Parra, F. I., Patel, B. S., Roach, C. M., Ruiz, J. Ruiz, Barnes, M., Dickinson, D., Dorland, W., Parisi, J. F., St-Onge, D., Wilson, H.
In magnetic confinement fusion devices, the ratio of the plasma pressure to the magnetic field energy, $\beta$, can become sufficiently large that electromagnetic microinstabilities become unstable, driving turbulence that distorts or reconnects the
Externí odkaz:
http://arxiv.org/abs/2208.10615
We formulate a generalized periodic boundary condition as a limit of the standard twist-and-shift parallel boundary condition that is suitable for simulations of plasmas with low magnetic shear. This is done by applying a phase shift in the binormal
Externí odkaz:
http://arxiv.org/abs/2208.02202