Zobrazeno 1 - 10
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pro vyhledávání: '"Hatch, D"'
Recent data, added to the ITPA global H-mode database [1] for ASDEX-U [2] and JET-ILW, reveals that the separatrix density $n_{sep}$ has a correlation with the H20 factor (Confinement time relative to the ITPA20-IL scaling)[1]. These trends are analy
Externí odkaz:
http://arxiv.org/abs/2406.15693
Autor:
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.
A gyrokinetic threshold model for pedestal width-height scaling prediction is applied to multiple devices and to a shaping and aspect-ratio scan giving $\Delta_{\mathrm{ped}} = 0.92 A^{1.04} \kappa^{-1.24} 0.38^{\delta} \beta_{\theta,\mathrm{ped}}^{1
Externí odkaz:
http://arxiv.org/abs/2401.14260
The free energy balance equation for gyrokinetic fluctuations is derived and applied to instabilities. An additional term due to electromagnetic sources is included. This can provide a simpler way to compute the free energy balance in practical appli
Externí odkaz:
http://arxiv.org/abs/2310.11624
Autor:
Hatch, D. R., Kotschenreuther, M. T., Li, P. -Y., Chapman-Oplopoiou, B., Parisi, J., Mahajan, S. M., Groebner, R.
This paper reports on the refinement (building on Ref.~\cite{hatch_22}) and application of simple formulas for electron heat transport from electron temperature gradient (ETG) driven turbulence in the pedestal. The formulas are improved by (1) improv
Externí odkaz:
http://arxiv.org/abs/2309.10708
Autor:
Curie, M. T., Hatch, D. R., Halfmoon, M., Chen, J., Brower, D. L., Hassan, E., Kotschenreuther, M., Mahajan, S. M., Groebner, R. J.
Experimental data on electromagnetic fluctuations in DIII-D, made available by the Faraday-effect Radial Interferometer-Polarimeter (RIP) diagnostic, is examined in comparison with detailed gyrokinetic simulations using Gyrokinetic Electromagnetic Nu
Externí odkaz:
http://arxiv.org/abs/2208.13845
Autor:
Parisi, J. F., Parra, F. I., Roach, C. M., Hardman, M. R., Schekochihin, A. A., Abel, I. G., Aiba, N., Ball, J., Barnes, M., Chapman-Oplopoiou, B., Dickinson, D., Dorland, W., Giroud, C., Hatch, D. R., Hillesheim, J. C., Ruiz, J. Ruiz, Saarelma, S., St-Onge, D.
Nonlinear multiscale gyrokinetic simulations of a Joint European Torus edge pedestal are used to show that electron-temperature-gradient (ETG) turbulence has a rich three-dimensional structure, varying strongly according to the local magnetic-field c
Externí odkaz:
http://arxiv.org/abs/2203.00831
Autor:
Sturdevant, Benjamin J., Ku, S., Chacón, L., Chen, Y., Hatch, D., Cole, M. D. J., Sharma, A. Y., Adams, M. F., Chang, C. S., Parker, S. E., Hager, R.
A fully implicit particle-in-cell method for handling the $v_\parallel$-formalism of electromagnetic gyrokinetics has been implemented in XGC. By choosing the $v_\parallel$-formalism, we avoid introducing the non-physical skin terms in Amp\`{e}re's l
Externí odkaz:
http://arxiv.org/abs/2106.06681
Autor:
Merlo, G., Huang, Z., Marini, C., Brunner, S., Coda, S., Hatch, D., Jarema, D., Jenko, F., Sauter, O., Villard, L.
Global gradient driven GENE gyrokinetic simulations are used to investigate TCV plasmas with negative triangularity. Considering a limited L-mode plasma, corresponding to an experimental triangularity scan, numerical results are able to reproduce the
Externí odkaz:
http://arxiv.org/abs/2101.05863
Autor:
Hatch, D. R., Kotschenreuther, M., Mahajan, S. M., Pueschel, M. J., Michoski, C., Merlo, G., Hassan, E., Field, A. R., Frassinetti, L., Giroud, C., Hillesheim, J. C., Maggi, C. F., von Thun, C. Perez, Roach, C. M., Saarelma, S., Jarema, D., Jenko, F., contributors, JET
We report on a detailed study of magnetic fluctuations in the JET pedestal, employing basic theoretical considerations, gyrokinetic simulations, and experimental fluctuation data, to establish the physical basis for their origin, role, and distinctiv
Externí odkaz:
http://arxiv.org/abs/2007.07332
Naturally stable to ELMs, and with widths larger than EPED predictions, the I-modes are an excellent laboratory for investigating the role of drift micro-instabilities in pedestals since I-mode pedestal are not "limited" by MHD instabilities. We pres
Externí odkaz:
http://arxiv.org/abs/2005.08924