Results 71 to 80 of about 20,009 (190)

A Review of Recent Developments in Atomic Processes for Divertors and Edge Plasmas

, 1995
The most promising concepts for power and particle control in tokamaks and other fusion experiments rely upon atomic processes to transfer the power and momentum from the edge plasma to the plasma chamber walls. This places a new emphasis on processes at
Afrosimov, Akiba, Allen, Anders, Bacal, Bachmann, Badnell, Badnell, Barnett, Bates, Bell, Bitter, Bonnin, Botero, Burgess, Cacciatore, Clark, D.E. Post, Djuric, Dolder, Dunn, Ehrhardt, Fonck, Grossman, Haas, Harrision, Herrman, Hiskes, Hiskes, Hogan, Hogan, Hulse, Hulse, Hulse, Hutchinson, Isler, Ito, Janeschitz, Janeschitz, Janev, Janev, Janev, Jensen, Jensen, Kato, Klepper, Krasheninnikov, Lackner, Lengyel, Lotz, Mahdavi, Marchand, Nagami, Neuhauser, Ogden, Petravic, Petrie, Petrie, Phaneuf, Phaneuf, Pindzola, Pindzola, Poschenrieder, Post, Post, Post, Rebut, Rebut, Reiter, Roth, Roth, Ruzic, Scott, Shimada, Stangeby, Summers, Tawara, Tawara, v. Emmichoven, v. Hellerman, Wahlin, Wan, Watkins, Weisheit, Wiese, Wiese, Wolf   +86 more
core   +1 more source

Strong ExB shear flows in the pedestal region in H-mode plasma

, 2006
We report the first experimental observation of stationary zonal flows in the pedestal region of the H-mode plasma in the H-1 toroidal heliac. Strong peaks in E_r shear mark the top and foot of the density pedestal.
A. M. Balk, H. Punzmann, H. Xia, M. G. Shats, S. M. Hamberger   +4 more
core   +1 more source

Toroidal modeling of Alfvén eigenmodes excited by runaway electrons in DIII-D and ITER

Nuclear Fusion
The non-perturbative MHD-kinetic hybrid code MARS-K (Liu et al 2014 Phys. Plasmas 21 056105) is updated to include relativistic effects for kinetic fast particles, enabling the code to model excitation of Alfvén eigenmodes (AEs) by runaway electrons (REs)
Yueqiang Liu, Chang Liu, Andrey Lvovskiy
doaj   +1 more source

Real time detection of multiple stable MHD eigenmode growth rates towards kink/tearing modes avoidance in DIII-D tokamak plasmas

Nuclear Fusion, 2023
Real time detection of time evolving growth rates of multiple stable magnetohydrodynamic (MHD) eigenmodes has been achieved in DIII-D tokamak experiments via multi-mode three-dimensional (3D) active MHD spectroscopy.
T. Liu, S. Munaretto, N.C. Logan, Z.R. Wang, M.D. Boyer, Z.X. Wang, E. Keith, J.-K. Park   +7 more
doaj   +1 more source

Remote operation of the DIII-D National Fusion Facility

Nuclear Fusion
Full remote scientific operation of the DIII-D National Fusion Facility is now possible through significant advances in the computer science hardware and software infrastructure made over the last decade.
D.P. Schissel, E. Cho, S. Flanagan, F. Garcia, C. Liu, M. Margo, J. Nguyen, P. Nguyen, C. Parker, B. Penaflor, T. Pederson, D. Piglowski, E. Rivas, R. Shapov, H. Shen, B. Short, T. Waddell, R. Kalling   +17 more
doaj   +1 more source

Analytic Criteria for Power Exhaust in Divertors due to Impurity Radiation

, 1995
Present divertor concepts for next step experiments such ITER and TPX rely upon impurity and hydrogen radiation to transfer the energy from the edge plasma to the main chamber and divertor chamber walls. The efficiency of these processes depends strongly
D. Post, F.W. Perkins, Hulse, Hulse, Jensen, Lengyel, N. Putvinskaya, Post, Rebut, W. Nevins   +9 more
core   +1 more source

Calculations of Energy Losses due to Atomic Processes in Tokamaks with Applications to the ITER Divertor

, 1995
Reduction of the peak heat loads on the plasma facing components is essential for the success of the next generation of high fusion power tokamaks such as the International Thermonuclear Experimental Reactor (ITER) 1 .
D. Post, Hulse R., J. Abdallah, Jensen R. V., N. Putvinskaya, R. E. H. Clark   +5 more
core   +1 more source

Visualizing DIII-D Tokarnak Magnetic Field Lines [PDF]

, 2000
We demonstrate the use of a combination of perceptually effective techniques for visualizing magnetic field data from the DIII-D Tokamak. These techniques can be implemented to run very efficiently on machines with hardware support for OpenGL ...
Schussman, Greg, Ma, Kwan-Liu, Schissel, David, Evans, Todd   +3 more
core  

Turbulent drifts of impurity ions as an explanation for anomalous radial transport in the far-SOL of DIII-D

Nuclear Fusion
Successful fusion reactor operation relies on minimal core contamination by impurities, otherwise too much power may be radiated and harm performance. This requires reliable predictions of impurity transport from the scrape-off layer (SOL) into the core,
S.A. Zamperini, T.N. Bernard, D.L Rudakov, J.A Boedo   +3 more
doaj   +1 more source

Experimental Measurement of ECH Deposition Broadening: Beyond Anomalous Transport

EPJ Web of Conferences, 2017
This work provides a first experimental measurement of broadened ECH deposition on the DIIID tokamak. As seen in theory[1] and simulation[2], refraction by edge density fluctuations shifts the path of RF waves, altering ECH and ECCD deposition.
Brookman M. W., Austin M. E., Gentle K. W., Petty C. C., Ernst D. E., Peysson Y., Decker J., Barada K.   +7 more
doaj   +1 more source