Zobrazeno 1 - 10
of 289
pro vyhledávání: '"Austin, M E"'
The flux coordinates with dual-region safety factor (q) in the poloidal direction are developed in this work. The X-point effects on the ideal MHD modes in tokamaks are then analyzed using this coordinate system. Since the X-point effects mainly affe
Externí odkaz:
http://arxiv.org/abs/2411.00194
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:
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:
Zheng, Linjin, Kotschenreuther, M. T., Waelbroeck, F. L., Austin, M. E., Rowan, W. L., Valanju, P., Liu, X.
The steady-state confinement, beta limit, and divertor heat load are among the most concerned issues for toroidal confinement of fusion plasmas. In this work, we show that the negative triangularity tokamak has promising prospects to address these is
Externí odkaz:
http://arxiv.org/abs/2401.15488
Autor:
Paz-Soldan, C., Chrystal, C., Lunia, P., Nelson, A. O., Thome, K. E., Austin, M. E., Cote, T. B., Hyatt, A. W., Marinoni, A., Osborne, T. H., Pharr, M., Sauter, O., Scotti, F., Wilks, T. M., Wilson, H. S.
Strongly-shaped diverted negative triangularity (NT) plasmas in the DIII-D tokamak demonstrate simultaneous access to high normalized current, pressure, density, and confinement. NT plasmas are shown to exist across an expansive parameter space compa
Externí odkaz:
http://arxiv.org/abs/2309.03689
Autor:
Nelson, A. O., Schmitz, L., Paz-Soldan, C., Thome, K. E., Cote, T. B., Leuthold, N., Scotti, F., Austin, M. E., Hyatt, A., Osborne, T.
In a series of high performance diverted discharges on DIII-D, we demonstrate that strong negative triangularity (NT) shaping robustly suppresses all edge-localized mode (ELM) activity over a wide range of plasma conditions: $\langle n\rangle=0.1-1.5
Externí odkaz:
http://arxiv.org/abs/2305.13458
This paper investigates energetic electron transport in magnetized toroidal plasmas with magnetic fields characterized by island chains and regions of stochastic field lines produced by coil perturbations. We report on experiments performed in the DI
Externí odkaz:
http://arxiv.org/abs/2303.02009
Publikováno v:
Review of Scientific Instruments; Jun2024, Vol. 95 Issue 6, p1-8, 8p
Publikováno v:
Rev. Sci. Instrum. 83, 103507 (2012)
A two channel oblique electron cyclotron emission (ECE) radiometer was installed on the DIII-D tokamak and interfaced to 4 gyrotrons. Oblique ECE was used to toroidally and radially localize rotating magnetic islands and so assist their electron cycl
Externí odkaz:
http://arxiv.org/abs/1302.7054
Autor:
Zhao, B., Austin, M. E.
Publikováno v:
Physics of Plasmas; Nov2023, Vol. 30 Issue 11, p1-12, 12p