Results 81 to 90 of about 20,009 (190)

Energetic Ion Experiments in DIII-D [PDF]

Fusion Science and Technology, 2005
A summary of fast ion experiments in the DIII-D tokamak is given. Most of the experiments involve {approx}80-keV deuterium beam ions. Deceleration of dilute fast-ion populations is accurately described by coulomb scattering theory. Fast waves with frequencies several times the deuterium cyclotron frequency interact with beam ions when the product of ...
openaire   +3 more sources

Erosion characterization of SiC and Ti3SiC2 on DIII-D using focused ion beam micro-trenches

Nuclear Materials and Energy, 2019
Plasma-facing materials in future large-scale fusion reactors must be designed to withstand high heat fluxes from extreme off-normal events such as edge localized modes and unmitigated plasma disruptions.
J. Coburn, E. Unterberg, J. Barton, D. Rudakov, I. Bykov, C.M. Parish, R. Wilcox, C. Lasnier, T. Abrams, J. Watkins, D.L. Hillis, M. Bourham   +11 more
doaj   +1 more source

Effects of non-axisymmetric magnetic field on neoclassical transport and ambipolar electric field in tokamak plasmas

Journal of Physics Communications
This study investigates how resonant magnetic perturbation (RMP) govern neoclassical transport and ambipolar electric field dynamics in tokamak plasmas.
Hanhui Li, Zhenggong Han, Yanyan Lu
doaj   +1 more source

High-performance double-null plasmas under radiating mantle scenarios on DIII-D

Nuclear Materials and Energy, 2019
Actively enhancing plasma radiated power has been used to reduce divertor heat flux in high power, high-performance double null divertor (DND) and near-DND plasmas in DIII-D, while at the same time maintaining acceptable energy confinement.
T.W. Petrie, B. Grierson, T.H. Osborne, F. Turco, S.L. Allen, M.E. Fenstermacher, J.R. Ferron, H.Y. Guo, E. Hinson, R. La Haye, C.J. Lasnier, A.W. Leonard, T.C. Luce, C. Petty, D. Thomas, B. Victor, H. Wang, J.G. Watkins   +17 more
doaj   +1 more source

Testing of the Prototype Receiver for ITER ECE Diagnostic

EPJ Web of Conferences, 2017
The Electron Cyclotron Emission (ECE) diagnostic system in ITER provides essential information for plasma control and for evaluating the plasma performance.
Danani S., Austin M. E., Brookman M.W., Pandya H. K. B., Kumar Vinay   +4 more
doaj   +1 more source

Saturation of fishbone instability through zonal flows driven by energetic particle transport in tokamak plasmas

Nuclear Fusion
Gyrokinetic and kinetic-MHD simulations are performed for the fishbone instability in the DIII-D discharge #178631, chosen for validation of first-principles simulations to predict the energetic particle (EP) transport in an ITER pre-fusion baseline ...
G. Brochard, C. Liu, X. Wei, W. Heidbrink, Z. Lin, M.V. Falessi, F. Zonca, Z. Qiu, N. Gorelenkov, C. Chrystal, X. Du, J. Bao, A.R. Polevoi, M. Schneider, S.H. Kim, S.D. Pinches, P. Liu, J.H. Nicolau, H. Lütjens, the ISEP group   +19 more
doaj   +1 more source

Reconstruction and interpretation of ionization asymmetry in magnetic confinement via synthetic diagnostics

Nuclear Fusion
Strong poloidal refueling asymmetry in the DIII-D tokamak is inferred from line radiation measurements. Synthetic diagnostics in neutral transport modeling coupled to gyrokinetic simulations illuminate implications for the plasma flow profile in the ...
G.J. Wilkie, F. Laggner, R. Hager, A. Rosenthal, S.-H. Ku, R.M. Churchill, L. Horvath, C.S. Chang, A. Bortolon   +8 more
doaj   +1 more source

First high-power helicon results from DIII-D

Nuclear Fusion
More than 0.6 MW of rf power at 476 MHz has been coupled to DIII-D plasmas by launching helicon (whistler) waves with a traveling-wave antenna (comb-line) in the fast-wave polarization (Van Compernolle et al 2021 Nucl. Fusion 61 116034) which resulted in
R.I. Pinsker, B. Van Compernolle, S.X. Tang, J.B. Lestz, C.P. Moeller, C.C. Petty, A. Dupuy, J.P. Squire, A.M. Garofalo, M. Porkolab, J.C. Rost, S.G. Baek, A. Nagy, S. Chowdhury, N.A. Crocker, G.H. Degrandchamp, A.G. McLean, K.R. Gage, A. Marinoni, E.H. Martin, G. Ronchi, the DIII-D Team   +21 more
doaj   +1 more source

Accelerating discoveries at DIII-D with the Integrated Research Infrastructure

Frontiers in Physics
DIII-D research is being accelerated by leveraging high performance computing (HPC) and data resources available through the National Energy Research Scientific Computing Center (NERSC) Superfacility initiative.
T. Bechtel Amara, S. P. Smith, Z. A. Xing, S. S. Denk, A. Deshpande, A. O. Nelson, C. Simpson, E. W. DeShazer, T. F. Neiser, O. Antepara, C. M. Clark, J. Lestz, J. Colmenares, N. Tyler, P. Ding, M. Kostuk, E. D. Dart, R. Nazikian, T. Osborne, S. Williams, T. Uram, D. Schissel   +21 more
doaj   +1 more source

Radiation modeling and experimental validation of sub-cyclotron frequency microwave synchrotron radiation as a diagnostic tool for runaway electrons in present and future tokamaks

Nuclear Fusion
The microwave synchrotron radiation in the sub-cyclotron frequency region has been systematically validated as a diagnostic method for runaway electrons (>1 MeV) with radiation modeling and experiments on the DIII-D tokamak.
Guanying Yu, Gerrit Kramer, Deyong Liu, Claudio Marini, Andrey Lvovskiy, Xiaoliang Li, Xinhang Xu, Ruifeng Xie, Zeyu Li, Max Austin, Yilun Zhu, N.C. Luhmann Jr   +11 more
doaj   +1 more source