Zobrazeno 1 - 10
of 778
pro vyhledávání: '"Parisi, A F"'
Asymmetries in deuterium-tritium (D-T) particle transport and divertor pumping speeds are shown to enhance tritium self-sufficiency in fusion power plants. Using a diffusive particle transport model that links the plasma core, separatrix, and diverto
Externí odkaz:
http://arxiv.org/abs/2410.05238
Autor:
Gaur, Rahul, Conlin, Rory, Dickinson, David, Parisi, Jason F., Dudt, Daniel, Panici, Dario, Kim, Patrick, Unalmis, Kaya, Dorland, William D., Kolemen, Egemen
To build an economically viable stellarator, it is essential to find a configuration that satisfies a set of favorable properties to achieve efficient steady-state nuclear fusion. One such property is omnigenity, which ensures confinement of trapped
Externí odkaz:
http://arxiv.org/abs/2410.04576
Autor:
Nelson, A. O., Vincent, C., Anand, H., Lovell, J., Parisi, J. F., Wilson, H. S., Imada, K., Wehner, W. P., Kochan, M., Blackmore, S., McArdle, G., Guizzo, S., Rondini, L., Freiberger, S., Paz-Soldan, C.
A plasma scenario with negative triangularity (NT) shaping is achieved on MAST-U for the first time. While edge localized modes (ELMs) are eventually suppressed as the triangularity is decreased below $\delta$ < -0.06, an extended period of H-mode op
Externí odkaz:
http://arxiv.org/abs/2408.00180
This study demonstrates that using spin-polarized deuterium-tritium (D-T) fuel with more deuterium than tritium can increase tritium burn efficiency (TBE) by at least an order of magnitude without compromising fusion power output, compared to unpolar
Externí odkaz:
http://arxiv.org/abs/2406.05970
Autor:
Nelson, A. O., Schmitz, L., Cote, T., Parisi, J. F., Stewart, S., Paz-Soldan, C., Thome, K. E., Austin, M. E., Scotti, F., Barr, J. L., Hyatt, A., Leuthold, N., Marinoni, A., Neiser, T., Osborne, T., Richner, N., Welander, A. S., Wehner, W. P., Wilcox, R., Wilks, T. M., Yang, J.
Tokamak plasmas with strong negative triangularity (NT) shaping typically exhibit fundamentally different edge behavior than conventional L-mode or H-mode plasmas. Over the entire DIII-D database, plasmas with sufficiently negative triangularity are
Externí odkaz:
http://arxiv.org/abs/2405.11082
Autor:
Parisi, J. F., Berkery, J. W., Sladkomedova, A., Guizzo, S., Hardman, M. R., Ball, J. R., Nelson, A. O., Kaye, S. M., Anastopoulos-Tzanis, M., McNamara, S. A. M., Dominski, J., Janhunen, S., Romanelli, M., Dickinson, D., Diallo, A., Dnestrovskii, A., Guttenfelder, W., Hansen, C., Myatra, O., Wilson, H. R.
A new burn control scheme for tokamaks is described where the total fusion power is controlled by adjusting the plasma volume fraction that is packed into power dense regions. In an example spherical tokamak burning plasma, by modifying the plasma ed
Externí odkaz:
http://arxiv.org/abs/2404.04387
Autor:
Macwan, T., Barada, K., Parisi, J. F., Groebner, R., Rhodes, T. L., Banerjee, S., Chrystal, C., Pratt, Q., Yan, Z., Wang, H., Zeng, L., Austin, M. E., Crocker, N. A., Peebles, W. A.
Enhanced $D_{\alpha}$ H-mode (EDA H-mode), an ELM-free H-mode regime, is explored in neutral beam heated, lower single null plasmas with near zero torque injection. This regime exhibits a good energy confinement ($\mathrm{H}_{\mathrm{98y2}}$ $\sim 1$
Externí odkaz:
http://arxiv.org/abs/2402.06789
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 $\Delta_{\mathrm{ped}} = 0.92 A^{1.04} \kappa^{-1.24} 0.38^{\delta} \beta_{\theta,\mathrm{ped}}^{1
Externí odkaz:
http://arxiv.org/abs/2401.14260
Autor:
Parisi, J. F., Nelson, A. O., Gaur, R., Kaye, S. M., Parra, F. I., Berkery, J. W., Barada, K., Clauser, C., Creely, A. J., Diallo, A., Guttenfelder, W., Hughes, J. W., Kogan, L. A., Kleiner, A., Kuang, A. Q., Lampert, M., Macwan, T., Menard, J. E., Miller, M. A.
Publikováno v:
Phys. Plasmas 31, 030702 (2024)
We use a new gyrokinetic threshold model to predict a bifurcation in tokamak pedestal width-height scalings that depends strongly on plasma shaping and aspect-ratio. The bifurcation arises from the first and second stability properties of kinetic-bal
Externí odkaz:
http://arxiv.org/abs/2312.05216
Autor:
Parisi, J. F., Guttenfelder, W., Nelson, A. O., Gaur, R., Kleiner, A., Lampert, M., Avdeeva, G., Berkery, J. W., Clauser, C., Curie, M., Diallo, A., Dorland, W., Kaye, S. M., McClenaghan, J., Parra, F. I.
A theoretical model is presented that for the first time matches experimental measurements of the pedestal width-height Diallo scaling in the low-aspect-ratio high-$\beta$ tokamak NSTX. Combining linear gyrokinetics with self-consistent pedestal equi
Externí odkaz:
http://arxiv.org/abs/2308.05238