Zobrazeno 1 - 10
of 49
pro vyhledávání: '"R. J. Jayakumar"'
Autor:
C. M. Greenfield, R. J. Jayakumar, T.C. Luce, C. T. Holcomb, S.L. Allen, M. A. Makowski, L.L. LoDestro, M. R. Wade, Herbert L Berk, P. A. Politzer, L.D. Pearlstein, C.C. Petty, T. A. Casper
Publikováno v:
Nuclear Fusion. 47:825-832
Alternatives to the usual picture of advanced tokamak (AT) discharges are those that form when anomalous thermal conductivity and/or resistivity alter plasma current and pressure profiles to achieve stationary characteristics through self-organizing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0955892b2f8f709c569d2d1c7185e3bf
https://doi.org/10.1088/0029-5515/47/8/013
https://doi.org/10.1088/0029-5515/47/8/013
Autor:
M. Choi, M. A. Van Zeeland, A. D. Turnbull, R. J. Jayakumar, Roscoe White, Ming-Sheng Chu, Dylan Brennan, L.L. Lao, Vincent Chan, Raffi Nazikian, P. A. Politzer, H.E. St. John
Publikováno v:
Nuclear Fusion. 47:434-442
Experimental observations in a number of tokamaks operated in the hybrid regime revealed that the presence of a rotating neoclassical island substantially reduces the occurrence of sawtooth. This possibility of a rotating mangetic island driving coun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bb5ebf6d4287e8764abaed21930a2ed
https://doi.org/10.1088/0029-5515/47/5/007
https://doi.org/10.1088/0029-5515/47/5/007
Autor:
E J Doyle, A M Garofalo, C M Greenfield, S M Kaye, J E Menard, M Murakami, S A Sabbagh, M E Austin, R E Bell, K H Burrell, J R Ferron, D A Gates, R J Groebner, A W Hyatt, R J Jayakumar, J E Kinsey, B P LeBlanc, T C Luce, G R McKee, M Okabayashi, Y-K M Peng, C C Petty, P A Politzer, T L Rhodes, M R Wade, R E Waltz, the DIII-D, NSTX Research Teams
Publikováno v:
Plasma Physics and Controlled Fusion. 48:B39-B52
Advanced tokamak (AT) research seeks to develop steady-state operating scenarios for ITER and other future devices from a demonstrated scientific basis. Normalized target parameters for steady-state operation on ITER are 100% non-inductive current op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4363edcbda93e235f0e5865ba08faf9
https://doi.org/10.1088/0741-3335/48/12b/s04
https://doi.org/10.1088/0741-3335/48/12b/s04
Autor:
R. J. Jayakumar, W. A. Peebles, George McKee, D. K. Finkenthal, T. L. Rhodes, T. N. Carlstrom, M. A. Makowski, G. J. Kramer, C. T. Holcomb, Raffi Nazikian, Max E Austin, E. J. Strait, W. M. Solomon, T. Deterly, M. A. Van Zeeland
Publikováno v:
Nuclear Fusion. 46:S880-S887
Recent upgrades to many of the diagnostic systems on DIII-D (Luxon J.L. 2002 Nucl. Fusion 42 614) such as the CO2 interferometer, far-infrared scattering, beam-emission spectroscopy (BES), and quadrature reflectometer have significantly extended thei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcd98a2e3ec29b1919d194293df8eb9a
https://doi.org/10.1088/0029-5515/46/10/s03
https://doi.org/10.1088/0029-5515/46/10/s03
Autor:
Chuanguo Zhang, C. L. Hsieh, M. R. Wade, R. J. Jayakumar, R. Prater, J.R. Ferron, K. H. Burrell, A. D. Turnbull, T.H. Osborne, Francois Waelbroeck, G. Wang, P. Gohil, E. J. Strait, A.W. Hyatt, John Lohr, D. P. Brennan, Max E Austin, C.C. Petty, T. L. Rhodes, P. A. Politzer, E. A. Lazarus, Ming-Sheng Chu, M. A. Makowski, H. Reimerdes, T.C. Luce, L.L. Lao, J. T. Scoville, R. J. Groebner
Publikováno v:
Plasma Physics and Controlled Fusion. 48:L65-L72
The effect of plasma shape on sawtooth oscillations in the DIII-D tokamak plasmas is investigated by comparing discharges with cross-sections shaped like a bean and an oval. The two shapes are designed so that the Mercier instability threshold is rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ebc0a644054c9a4e3e50d6fe5224991
https://doi.org/10.1088/0741-3335/48/8/l01
https://doi.org/10.1088/0741-3335/48/8/l01
Autor:
R. Prater, M. Murakami, J.R. Ferron, Jonathan Menard, Am Garofalo, C.E. Kessel, P. A. Politzer, A.W. Hyatt, T.C. Luce, R.J. La Haye, Todd Evans, J. Kim, R. J. Jayakumar, R.A. Moyer, T. A. Casper, K. H. Burrell, P. Gohil, M. R. Wade, C.C. Petty, M. A. Makowski, Didier Mazon, John Lohr
Publikováno v:
Plasma Physics and Controlled Fusion. 48:A45-A53
Active control of plasma profiles is an essential requirement for operating within plasma stability limits, for steady-state operation and for optimization of the plasma performance. In DIII-D, plasma profiles have been actively controlled using vari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c2a7ef4d597e69a51ef34028c94f9a9
https://doi.org/10.1088/0741-3335/48/5a/s03
https://doi.org/10.1088/0741-3335/48/5a/s03
Autor:
J.M. Bialek, M. Takechi, G.L. Jackson, P. Gohil, Yueqiang Liu, A. D. Turnbull, O. Katsuro-Hopkins, Anders Bondeson, Torkil H. Jensen, J. T. Scoville, Gerald Navratil, R. Hatcher, Jonathan Menard, R. J. Jayakumar, E. J. Strait, M. A. Makowski, Am Garofalo, Ming-Sheng Chu, J. S. Kim, J. Manickam, R.J. La Haye, M. Okabayashi, M. S. Chance, H. Reimerdes, Yongkyoon In
Publikováno v:
Nuclear Fusion. 45:1715-1731
Internal coils, 'I-Coils', were installed inside the vacuum vessel of the DIII-D device to generate non-axisymmetric magnetic fields to act directly on the plasma. These fields are predicted to stabilize the resistive wall mode (RWM) branch of the lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfb9f8c9fb80033da2e8b10c4e1aba4b
https://doi.org/10.1088/0029-5515/45/12/028
https://doi.org/10.1088/0029-5515/45/12/028
Autor:
Robert D. Johnson, J.A. Leuer, M.L. Walker, R. J. Jayakumar, R.R. Khayrutdinov, B.G. Penaflor, D.A. Humphreys, R. D. Deranian, R.J. La Haye, J.R. Ferron, A.S. Welander, M. A. Makowski
Publikováno v:
Fusion Engineering and Design. 74:665-669
The DIII-D mission to explore the advanced tokamak (AT) regime places significant demands on the DIII-D plasma control system (PCS) [D.A. Humphreys, et al., Fusion Eng. Des. 66–68 (2003) 633], including simultaneous and accurate regulation of plasm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9e36f2697bac8859408fbbea2740871
https://doi.org/10.1016/j.fusengdes.2005.06.326
https://doi.org/10.1016/j.fusengdes.2005.06.326
Autor:
T. S. Taylor, A. W. Hyatt, T. W. Petrie, J. Lohr, M. Murakami, Diii-D Team, J.C. DeBoo, W. P. West, G. Wang, R. J. Groebner, K. H. Burrell, T. C. Luce, P. Gohil, Cc Petty, Charles Kessel, C. M. Greenfield, Lei Zeng, H.E. St. John, M. E. Austin, M. R. Wade, J. R. Ferron, G. M. Staebler, J. Hobirk, R. J. Jayakumar, K. Kajiwara, R. J. La Haye, J. E. Menard, P.A. Politzer, M. A. Makowski, D. P. Brennan, A. C. C. Sips, T. A. Casper, I. A. Gorelov, A. M. Garofalo, J. E. Kinsey, J. Kim, T. L. Rhodes, L. L. Lao, S. L. Allen, E. J. Doyle, R. Prater, R. I. Pinsker
Publikováno v:
Nuclear Fusion. 45:1419-1426
The advanced tokamak programme on DIII-D is to develop the scientific basis for steady state, high performance operation in future devices. We report on experiments attempting to demonstrate sustainment of 100% noninductive current for several second
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13d40020189c2c9db965c3bb5fa587b6
https://doi.org/10.1088/0029-5515/45/11/024
https://doi.org/10.1088/0029-5515/45/11/024
Autor:
R. J. Jayakumar, S. L. Allen, M. A. Makowski, K. H. Burrell, C.C. Petty, L.L. Lao, Daniel Thomas
Publikováno v:
Fusion Science and Technology. 48:852-863
The measurement of the plasma current profile is crucial to many operating regimes and investigations on the DIII-D tokamak. The measurement is required to obtain accurate equilibria and to accurately calculate stability and transport characteristics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40dbff2391d161c6a0d3a4a21fd233e1
https://doi.org/10.13182/fst05-a1044
https://doi.org/10.13182/fst05-a1044