Results 21 to 30 of about 63,312 (284)

Confinement improvement in H-mode-like plasmas in helical systems

Plasma Physics and Controlled Fusion, 1994
The reduction of the anomalous transport due to the inhomogeneous radial electric field is theoretically studied for toroidal helical plasmas. The self-sustained interchange-mode turbulence is analysed for a system with magnetic shear and magnetic hill.
K Itoh, S -I Itoh, A Fukuyama, H Sanuki, M Yagi   +4 more
openaire   +1 more source

Radial localization of electron temperature pedestal and ELM-like events using ECE measurements at Wendelstein 7-X [PDF]

EPJ Web of Conferences, 2023
A magnetic configuration scan was performed at Wendelstein 7-X stellarator by varying the rotational transform to analyze the plasma confinement for magnetic configurations with different edge magnetic island locations and sizes.
Chaudhary N., Hirsch M., Andreeva T., Geiger J., Hoefel U., Rahbarnia K., Wurden G. A., Wolf R. C.   +7 more
doaj   +1 more source

Observations and Empirical Scalings of the High-Confinement Mode Pedestal on Alcator C-Mod [PDF]

, 2002
and disposal, in whole or in part, by or for the United States government is permitted. Observations and empirical scalings of the high-confinement mode pedestal on Alcator C-Mod J.W. Hughes, D.A. Mossessian, A.E. Hubbard, B. LaBombard, E.S.
Bombard, B., Hubbard, A.E., Hughes, J.W., Marmar, E.S., Mossessian, D.A.   +4 more
core   +2 more sources

The dependence of confinement on the isotope mass in the core and the edge of AUG and JET-ILW H-mode plasmas [PDF]

Nuclear Fusion, 2021
Abstract Experiments in ASDEX Upgrade (AUG) and JET with the ITER-like wall (JET-ILW) are performed to separate the pedestal and core contributions to confinement in H-modes with different main ion masses. A strong isotope mass dependence in the pedestal is found which is enhanced at high gas puffing. This is because the ELM type changes
P.A. Schneider, C. Angioni, L. Frassinetti, L. Horvath, M. Maslov, F. Auriemma, M. Cavedon, C.D. Challis, E. Delabie, M.G. Dunne, J.M. Fontdecaba, J. Hobirk, A. Kappatou, D.L. Keeling, B. Kurzan, M. Lennholm, B. Lomanowski, C.F. Maggi, R.M. McDermott, T. Pütterich, A. Thorman, M. Willensdorfer, null the ASDEX Upgrade Team, null the EUROfusion MST1 Team, null JET Contributors   +24 more
openaire   +3 more sources

Glass transition of charged particles in two-dimensional confinement [PDF]

, 2015
The glass transition of mesoscopic charged particles in two-dimensional confinement is studied by mode-coupling theory. We consider two types of effective interactions between the particles, corresponding to two different models for the distribution of ...
Heinen, Marco, Ivlev, Alexei, Löwen, Hartmut, Sperl, Matthias, Yazdi, Anoosheh   +4 more
core   +3 more sources

Helium exhaust experiments on JET with Type I ELMs in H-mode and with type III ELMs in ITB discharges [PDF]

, 1976
An analysis of helium exhaust experiments on JET in the MkII-GB divertor configuration is presented. Helium is pumped by applying an argon frost layer on the divertor cryo pump.
Akers, R. J., Alladio, F., Appel, L. C., Axon, K. B., Ben Ayed, N., Boerner, P., Buttery, R. J., Carolan, P. G., Challis, C. D., Chapman, I. T., Ciric, D., Connor, J. W., Conway, N. J., Counsell, G. F., Cowley, S., Cox, M., Coyler, G., Cunningham, G., Darke, A., deBock, M., Dendy, R. O., deTemmerman, G., Dnestrovskij, A. Yu, Dnestrovskij, Yu. N., Dowling, J., Dudson, B., Dunai, D., Dunstan, M., Field, A. R., Foster, A., Garzotti, L., Gibson, K., Gryaznevich, M. P., Guttenfelder, W., Harrison, J., HASH(0x555de1024240), HASH(0x555de132a640), Hawkes, N. C., Helander, P., Hender, T. C., Hnat, B., Hole, M. J., Howell, D. F., Hua, M. Duc, Hubbard, A., Istenic, M., Joiner, N., Keeling, D., Kirk, A., Koslowski, H. R., Liang, Y., Lilley, M. K., Lisgo, S., Lloyd, B., Maddison, G. P., Maingi, R., Mancuso, A., Manhood, S. J., Martin, R., McArdle, G. J., McCone, J., Meyer, H., Michael, C., Micozzi, P., Morgan, T., Morris, A. W., Muir, D. G., Nardon, E., Naylor, G., O'Brien, M. R., O'Gorman, T., Patel, A., Pinches, Simon David, Preinhaelter, J., Price, M. N., Rachlew, E., Reiter, D., Roach, C. M., Rozhansky, V., Saarelma, S., Saveliev, A., Scannell, R., Sharapov, S. E. (Sergei E.), Shevchenko, V., Shibaev, S., Smith, H., Staebler, G. E., Stork, D., Storrs, J., Sykes, A., Tallents, S., Tamain, P., Taylor, D., Temple, D., Thomas-Davies, N., Thornton, A., Thyagaraja, A., Turnyanskiy, M. R., Urban, J., Valovic, M., Vann, R. G. L., Volpe, F., Voss, G., Walsh, M. J., Warder, S. E. V., Watkins, R., Wilson, H. R., Windridge, M., Wisse, M., Zabolotski, A., Zoletnik, S., Zolotukhin, O.   +111 more
core   +16 more sources

Effect of N2, Ne and Ar seeding on Alcator C-Mod H-mode confinement [PDF]

, 2011
The mitigation of divertor heat fluxes is an active topic of investigation on existing tokamaks. One approach uses radiation, both inside and outside the last closed flux surface (LCFS), to convert plasma thermal energy, usually directed towards ...
Brunner, Daniel Frederic, Hughes, John F., Hutchinson, Ian Horner, Labombard, Brian, Loarte, A., Payne, Joshua E., Reinke, Matthew Logan, Terry, James L   +7 more
core   +1 more source

The I-mode confinement regime at ASDEX Upgrade: global propert ies and characterization of strongly intermittent density fluctuations [PDF]

, 2016
Properties of the I­mode confinement regime on the ASDEX Upgrade tokamak are summarized. A weak dependence of the power threshold for the L­I transition on the toroidal magnetic field strength is found.
Bernert, M., Conway, G., Dunne, M., Guimarais, L., Happel, T., Hennequin, P., Hetzenecker, A., Honore, C., Manz, P., Maraschek, M., Ryter, F., Stroth, U., Viezzer, E.   +12 more
core   +5 more sources

H-mode grade confinement in L-mode edge plasmas at negative triangularity on DIII-D [PDF]

Physics of Plasmas, 2019
Plasmas with a negative triangularity shape have been created on the DIII-D tokamak that, despite maintaining standard L-mode edge radial profiles, reach volume averaged pressure levels typical of H-mode scenarios. Within the auxiliary power available for these experiments, plasmas exhibit near-zero power degradation while sustaining βN = 2.7 and H98 ...
A. Marinoni, M. E. Austin, A. W. Hyatt, M. L. Walker, J. Candy, C. Chrystal, C. J. Lasnier, G. R. McKee, T. Odstrčil, C. C. Petty, M. Porkolab, J. C. Rost, O. Sauter, S. P. Smith, G. M. Staebler, C. Sung, K. E. Thome, A. D. Turnbull, L. Zeng   +18 more
openaire   +1 more source

Observation of long-radial-range-correlation in turbulence in high-collisionality high-confinement plasmas on DIII-D

Nuclear Fusion, 2023
We report on the observation of spatially asymmetric turbulent structures with a long radial correlation length in the core of high-collisionality H -mode plasmas on DIII-D tokamak.
R. Hong, T.L. Rhodes, P.H. Diamond, Y. Ren, L. Zeng, X. Jian, K. Barada, G. Wang, W.A. Peebles   +8 more
doaj   +1 more source