Results 271 to 280 of about 63,312 (284)

H mode power threshold and confinement in JET H, D, DT and T plasmas

Nuclear Fusion, 1999
The scaling of both the L-H threshold and confinement with the mass M of hydrogenic isotopes is discussed. The confinement was found to scale differently with M in the core and the edge, and a two region model has been developed to represent the physical behaviour of each region.
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Degradation of energy and particle confinement in high-density ELMy H-mode plasmas on JT-60U

Plasma Physics and Controlled Fusion, 1997
Degradation of energy and particle confinement was investigated with a high-recycling divertor in ELMy H-mode plasma on JT-60U with high-power neutral beam injection of 18 - 19 MW; the plasma parameters were fixed at . The reduction in global energy confinement time was due to a reduction in the stored energy of fast ions with increasing plasma ...
N Asakura, K Shimizu, H Shirai, Y Koide, T Takizuka   +4 more
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Hydrogen isotope effects on ITG scale length, pedestal and confinement in JT-60 H-mode plasmas

Nuclear Fusion, 2013
The dependence of heat transport, edge pedestal and confinement on isotopic composition was investigated in conventional H-mode plasmas. Identical profiles for the electron density, electron temperature and ion temperature were obtained for hydrogen and deuterium plasmas, whereas the required power clearly increased for hydrogen, which resulted in a ...
H. Urano, T. Takizuka, N. Aiba, M. Kikuchi, T. Nakano, T. Fujita, N. Oyama, Y. Kamada, N. Hayashi   +8 more
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Improved confinement in high-density H-modes via modification of the plasma boundary with lower hybrid wavesa)

Physics of Plasmas, 2015
Injecting Lower Hybrid Range of Frequency (LHRF) waves into Alcator C-Mod's high-density H-mode plasmas has led to enhanced global energy confinement by increasing pedestal temperature and pressure gradients, decreasing the separatrix density, modifying the pedestal radial electric field and rotation, and decreasing edge turbulence.
J. L. Terry, M. L. Reinke, J. W. Hughes, B. LaBombard, C. Theiler, G. M. Wallace, S. G. Baek, D. Brunner, R. M. Churchill, E. Edlund, P. Ennever, I. Faust, T. Golfinopoulos, M. Greenwald, A. E. Hubbard, J. Irby, Y. Lin, R. R. Parker, J. E. Rice, S. Shiraiwa, J. R. Walk, S. J. Wukitch, P. Xu   +22 more
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Transport modeling of core fueling and global particle confinement in ELM-free H-mode plasma in DIII-D

Journal of Nuclear Materials, 1995
Abstract Evaluations of core fueling rates and global particle confinement times are presented for a single-null ELM-free H-mode discharge in the DIII-D tokamak. The edge plasma transport is modeled with the B2.5 code, and the neutral transport with both the DEGAS code and the internal neutrals model in the B2.5 code.
L.W. Owen, R. Maingi, D.K. Lee, P.K. Mioduszewski, D.R. Baker, D.L. Hillis, J.T. Hogan, G.L. Jackson, M.R. Wade   +8 more
openaire   +1 more source

Heating and confinement in H-mode and L-mode plasmas in DIII-D using outside launch electron cyclotron heating

Nuclear Fusion, 1990
Using the outside launch with vertical polarization, electron cyclotron heating (ECH) experiments in DIII-D were carried out at 60 GHz at fundamental and second harmonic frequencies. The results are consistent with wave absorption theory for accessibility. For fundamental heating with a cut-off layer between the launch location and the resonant surface,
B.W. Stallard, D.A. Content, R.J. Groebner, D.N. Hill, R. James, J.M. Lohr, T. Luce, K. Matsuda, M.J. Mayberry, C.P. Moeller, R. Prater, T.C. Simonen, R.T. Snider   +12 more
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Moderation of divertor heat loads by fuelling and impurity seeding in well-confined ELMy H-mode plasmas on JET

Nuclear Fusion, 2011
In anticipation of revised operational limits accompanying upgrade of the JET tokamak to an all-metal, ITER-like wall, systematic studies have been conducted of moderating divertor heat load in type I ELMy H-mode by enhanced deuterium fuelling and seeding with the extrinsic impurities neon or nitrogen.
Maddison, G. P., Giroud, C., Mccormick, G. K., Alonso, J. A., Alper, B., Arnoux, G., da Silva Aresta Belo, P. C., Beurskens, M. N. A., Boboc, A., Brezinsek, S., Coffey, I., Devaux, S., Eich, T., Fundamenski, W., Harting, D., Huber, A., Jachmich, S., Jenkins, I., Joffrin, E., Kempenaars, M. A. H., Lehnen, M., Loarer, T., Lomas, P. J., Meigs, A. G., Morgan, P. D., Riccardo, V., Rimini, F. G., Stamp, M. F., Telesca, G., Thomsen, H., Abel, I., Afanesyev, V., Agarici, G., Aggarwal, K. M., Airila, M., Akers, R., Alarcon, T.h., Albanese, R., Alexeev, A., Alfier, A., Allan, P., Almaviva, S., Alonso, A., Alonso, M., Altmann, H., Alves, D., Ambrosino, G., Amosov, V., Anda, G., Andersson, F., Andersson Sund ́en, E., Andreev, V., Andrew, Y., Angelone, M., Anghel, M., Anghel, A., Angioni, C., Apruzzese, G., Arcis, N., Arena, P., Argouarch, A., Ariola, M., Armitano, A., Armstrong, R., Arshad, S., Artaserse, G., Artaud, J. F., Ash, A., Asp, E., Asunta, O., Atanasiu, C. V., Atkins, G., Axton, M. D., Ayres, C., Baciero, A., Bailescu, V., Baiocchi, B., Baker, R. A., Balboa, I., Balorin, C., Balshaw, N., Banks, J. W., Baranov, Y. F., Barbier, D., Barlow, I. L., Barnard, M. A., Barnsley, R., Barrena, L., Barrera, L., Baruzzo, M., Basiuk, V., Bateman, G., Batistoni, P., Baumgarten, N., Baylor, L., Bazylev, B., Beaumont, P. S., Beausang, K., B ́ecoulet, M., Bekris, N., Beldishevski, M., Bell, A. C., Belli, F., Bellinger, M., Bellizio, T., Belo, P. S. A., Belonohy, ́ E., Bennett, P. E., Benterman, N. A., Berger By, G., Bergsåker, H., Berk, H., Bernardo, J., Bertrand, B., Bieg, B., Bienkowska, B., Biewer, T., Biewer, T. M., Bigi, M., Bilato, R., Bird, J., Bizarro, J., Blackman, T. R., Blanchard, P., Blanco, E., Blum, J., Bobkov, V., Boilson, D., Bolshakova, I., Bolzonella, T., Boncagni, L., Bonheure, G., Bonnin, X., Borba, D., Borthwick, A., Botrugno, A., Boulbe, C., Bouquey, F., Bourdelle, C., Bovert, K. V., Bowden, M., Boyce, T., Boyer, H. J., Bozhenkov, A., Brade, R. J., Bradshaw, J. M. A., Braet, J., Braic, V., Braithwaite, G. C., Brault, C., Braune, H., Breizman, B., Bremond, S., Brennan, P. D., Brett, A., Breue, J., Bright, M. D. J., Briscoe, F., Brix, M., Brombin, M., Brown, B. C., Brown, D. P. D., Bruschi, A., Brzozowski, J., Bucalossi, J., Buckley, M. A., Budd, T., Budny, R., Budny, R. V., Bunting, P., Buratti, P., Burcea, G., Butcher, P. R., Buttery, R. J., Cac ̧ ̃ao, R., Calabr`o, G., Callaghan, C. P., Caminade, J. P., Camp, P. G., Campling, D. C., Canik, J., Cannas, B., Capel, A. J., Carannante, G., Card, P. J., Cardinali, A., Carlstrom, T., Carman, P., Carralero, D., Carraro, L., Carter, T., Carvalho, B. B., Carvalho, P., Casati, A., Castaldo, C., Caughman, J., Cavazzana, R., Cavinato, M., Cecconello, M., Cecil, F. E.   +199 more
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Evolution of plasma parameters in the termination phase of high confinement H-modes at JET and implications for ITER

Nuclear Fusion, 2014
The evolution of the parameters of the plasma in the termination phase of high confinement H-modes at JET with carbon fibre composite plasma facing components (JET-C) has been analysed with a view to predict the dynamics of the plasma energy decrease for sudden terminations of the ITER QDT = 10 scenario caused by malfunction of additional heating ...
Loarte, A., Koechl, F., Leyland, M. J., Polevoi, A., Beurskens, M., Parail, V., Nunes, I., Saibene, G. R., Sartori R. I. A, I. Abel, Abel, I., Afanesyev, V., Aftanas, M., Agarici, G., Aggarwal, K. M., Aho Mantila, L., Ahonen, E., Aints, M., Airila, M., Akers, R., Alarcon, T., Albanese, R., Alexeev, A., Alfier, A., Allan, P., Almaviva, S., Alonso, A., Alper, B., Altmann, H., Alves, D., Ambrosino, G., Amosov, V., Andersson, F., Anderssonsund ́en, E., Andreev, V., Andrew, Y., Angelone, M., Anghel, M., Anghel, A., Angioni, C., Apruzzese, G., Arcis, N., Arena, P., Argouarch, A., Ariola, M., Armitano, A., Armstrong, R., Arnoux, G., Arshad, S., Artaserse, G., Artaud, J. F., Ash, A., Asp, E., Asunta, O., Atanasiu, C. V., Atkins, G., Avotina, L., Axton, M. D., Ayres, C., Baciero, A., Bailescu, V., Baiocchi, B., Baker, R. A., Balboa, I., Balden, M., Balorin N. Balshaw, C. Balorin N. Balshaw, Banks, J. W., Baranov, Y. F., Barbier, D., Barlow, I. L., Barnard, M. A., Barnsley, R., Barrena, L., Barrera, L., Baruzzo, M., Basiuk, V., Bateman, G., Batistoni, P., Baumgarten, N., Baylor, L., Bazylev, B., Beaumont, P. S., Beausang, K., B ́ecoulet, M., Bekris, N., Beldishevski, M., Bell, A. C., Belli, F., Bellinger, M., Bellizio, T., Belo, P. S. A., Belonohy, E., Bennett, P. E., Benterman, N. A., Berger By, G., Bergsåker, H., Berk, H., Bernardo, J., Bernert, M., Bertrand, B., Beurskens, M. N. A., Bieg, B., Bienkowska, B., Biewer, T. M., Bigi, M., B ́ılkov ́a, P., Bin, W., Bird, J., Bizarro, J., Bj ̈orkas, C., Blackman, T. R., Blanchard, P., Blanco, E., Blum, J., Bobkov, V., Boboc, A., Boilson, D., Bolshakova, I., Bolzonella, T., Boncagni, L., Bonheure, G., Bonnin, X., Borba, D., Borthwick, A., Botrugno, A., Boulbe, C., Bouquey, F., Bourdelle, C., Bovert, K. V., Bowden, M., Boyce, T., Boyer, H. J., Bozhenkov, A., Brade, R. J., Bradshaw, J. M. A., Braet, J., Braic, V., Braithwaite, G. C., Brault, C., Breizman, B., Bremond, S., Brennan, P. D., Brett, A., Breue, J., Brezinsek, S., Bright, M. D. J., Briscoe, F., Brix, M., Brombin, M., Brown, B. C., Brown, D. P. D., Brzozowski, J., Bucalossi, J., Buckley, M. A., Budd, T., Budny, R. V., Bunting, P., Buratti, P., Burcea, G., Burckhart, A., Butcher, P. R., Buttery, R. J., Cahyna, P., Calabr`o, G., Callaghan, C. P., Caminade, J. P., Camp, P. G., Campling, D. C., Caniello, R., Canik, J., Cannas, B., Capel, A. J., Carannante, G., Card, P. J., Cardinali, A., Carlstrom, T., Carman, P., Carralero, D., Carraro, L., Carter, T., Carvalho, B. B., Carvalho, I., Carvalho, P., Casati, A., Castaldo, C., Caughman, J., Cavazzana, R., Cavinato, M., Cecconello, M., Cecil, E., Cecil, F. E., Cenedese, A., Centioli, C., Cesario, R., Challis, C. D., Chandler, M., Chang, C., Chankin, A., Chapman, I. T., Chektybayev, B., Chernyshova, M., Romanelli, F.   +200 more
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Decoupling the effects of plasma current, density and temperature on DIII-D H-mode energy confinement

Plasma Physics and Controlled Fusion, 1996
Experiments that decoupled H-mode plasma current, density and temperature have been performed on the DIII-D tokamak by the application of divertor cryopumping. Deuterium ELMing H-mode steady state discharges were operated in the single null configuration with neutral beam heating.
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E–H mode transition of a high-power inductively coupled plasma torch at atmospheric pressure with a metallic confinement tube

Plasma Sources Science and Technology, 2012
Inductively coupled plasma torches need high ignition voltages for the E–H mode transition and are therefore difficult to operate. In order to reduce the ignition voltage of an RF plasma torch with a metallic confinement tube the E–H mode transition was studied. A Tesla coil was used to create a spark discharge and the E–H mode transition of the plasma
Altenberend, J., Chichignoud, G., Delannoy, Y.   +2 more
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