Results 11 to 20 of about 1,356 (162)

Impurity radiation seeding of neoclassical tearing mode growth

Nuclear Fusion
The physics of neoclassical tearing modes (NTMs) is of great concern to tokamak plasma stability and performance, especially in the burning plasma regime.
Shiyong Zeng, Ping Zhu, Eric C. Howell
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Impurity-seeded plasma experiments on JET [PDF]

Nuclear Fusion, 2002
Scaling to larger tokamaks of high confinement plasmas with radiating edges, induced by impurities, is being studied through internationally collaborative experiments on JET. In campaigns till the end of 2000, three different regimes have been explored. A small number of limiter L-mode discharges seeded with neon have most closely repeated the approach
G.P Maddison, M Brix, R Budny, M Charlet, I Coffey, J.G Cordey, P Dumortier, S.K Erents, N.C Hawkes, M. von Hellermann, D.L Hillis, J Hogan, L.D Horton, L.C Ingesson, S Jachmich, G.L Jackson, A Kallenbach, H.R Koslowski, K.D Lawson, A Loarte, G.F Matthews, D McDonald, G.R McKee, A Meigs, A.M Messiaen, F Milani, P Monier-Garbet, M Murakami, M.F.F Nave, J Ongena, M.E Puiatti, E Rachlew, J Rapp, S Sharapov, G.M Staebler, M Stamp, J.D Strachan, W Suttrop, G Telesca, M.Z Tokar, B Unterberg, M Valisa, K.-D Zastrow, EFDA-JET 2000 workprogramme contributors   +43 more
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The influence of impurities in natural seeds of alfalfa and red clover on the seed cleaning process [PDF]

Journal on Processing and Energy in Agriculture, 2021
The paper presents the results of the cleaning process of five different lots of natural alfalfa seeds and five different lots of natural red clover seeds. Natural alfalfa and red clover seeds had 75 % to 77 % purity. The experiment was performed in the seed processing center of the Institute for Forage Crops Kruševac.
Dragoslav Đokić, Dragan Terzić, Vera Rajičić, Sanja Živković, Violeta Oro, Jasmina Milenković, Ranko Koprivica   +6 more
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Divertor Impurity Seeding Experiments at the COMPASS Tokamak [PDF]

Nuclear Fusion, 2019
Partial detachment is the desired regime for the baseline burning plasma scenario in ITER and other next-step devices, as it allows for the dissipation of the majority of the energy carried by charged particles through the scrape-off-layer and thus avoids localised heat flux deposition in the divertor region.
Komm, M., Khodunov, I., Cavalier, J., Horacek, J., Seidl, J., Naydenkova, D., Adamek, J., Bilkova, P., Bohm, P., Devitre, A., Dimitrova, M., Elmore, S., Faitsch, M., Hacek, P., Havlicek, J., Havranek, A., Imrisek, M., Krbec, J., Peterka, M., Panek, R., Popov, T., Samoylov, O., Tomes, M., Tomova, K., Vondracek, P., Weinzettl, V.   +25 more
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Plasma surface interactions in impurity seeded plasmas [PDF]

Journal of Nuclear Materials, 2011
Abstract With tokamak devices developing towards higher heating powers, and carbon plasma facing components being increasingly replaced by high-Z materials like tungsten, impurity seeding for radiative power dissipation gains more importance. This review summarizes the core and divertor radiative characteristics of potential seeding species, namely ...
Kallenbach, A., Balden, M., Dux, R., Eich, T., Giroud, C., Huber, A., Maddison, G. P., Mayer, M., Mccormick, K., Neu, R., Petrie, T. W., Pütterich J. Rapp, T. Pütterich J. Rapp, Reinke, M. L., Schmid, K., Schweinzer, J., Wolfe, S., The, ASDEX Upgrade Team, DIII D, Team, Alcator, Team, 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., Alper, B., 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., Arnoux, G., 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., Beurskens, M. N. A., 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., 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., Braune, H., 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., 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., Cenedese, A., Centioli, C., Cesario, R., Challis, C. D., Chandler, M., Chang, C.   +199 more
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Improved ELM scaling with impurity seeding in JET [PDF]

Plasma Physics and Controlled Fusion, 2003
Argon-seeded H-modes in low triangularity pumped-limiter-like, and medium to high triangularity divertor, configurations on JET are described, focusing upon ELM effects. Appropriate fuelling and seeding strategies in each geometry have combined good confinement with density around the Greenwald level, accompanied by ELMs shown to have explicitly Type I
Maddison, G., Budny, R., Dumortier, P., Jachmich, S., Loarte, A., Messiaen, A., Monier-Garbet, P., Nave, M., Ongena, J., Rapp, J., Strachan, J., JET EFDA Contributors, et al.   +12 more
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Predictive modelling of impurity seeded plasmas in JET [PDF]

Plasma Physics and Controlled Fusion, 2002
Seeding of impurities into JET resulted in a pronounced modification of plasma confinement properties. In order to analyse the underlying mechanisms a predictive transport modelling has been performed by means of two approaches. (i) The Chalmers advanced fluid model for temperature gradient driven instabilities is applied to determine all transport ...
M Z Tokar, H Nordman, J Weiland, J Ongena, V Parail, B Unterberg, contributors to the EFDA-JET Workprogramme   +6 more
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Impurity seeding and scaling of edge parameters in ITER [PDF]

Journal of Nuclear Materials, 2009
Abstract ITER divertor and edge modelling with the ITER B2–EIRENE code including neutral–neutral and molecule–ion collisions has led to updated scaling of the helium density and flux and the DT flux with the pumping speed and the divertor neutral pressure.
Pacher, H. D., Kukushkin, A. S., Pacher, G. W., Kotov, V., Janeschitz, G., Reiter, D., Coster, D. P., ASDEX Upgrade Team   +7 more
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Impurity transport studies in ASDEX by means of neon-seeded pellets [PDF]

Nuclear Fusion, 1989
Neon-seeded deuterium pellets, containing 1% neon, were successfully produced and injected into ASDEX divertor discharges. The behaviour of the deposited neon ions was studied by VUV spectroscopy, using a special version of the ASDEX/JET impurity transport code for interpretation.
Behringer, K., Buechl, K.
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The radiated power limit in impurity seeded JET-ILW plasmas

Nuclear Materials and Energy, 2022
The total radiated fraction is examined in high density H-mode plasmas (Greenwald fraction of about 85 %) in JET by the variation of the auxiliary heating power of Pheat = 14 MW-29 MW.
A. Huber, M. Wischmeier, S. Wiesen, M. Bernert, A.V. Chankin, S. Aleiferis, S. Brezinsek, V. Huber, G. Sergienko, C. Giroud, M. Groth, S. Jachmich, Ch. Linsmeier, B. Lomanowski, C. Lowry, G.F. Matthews, A.G. Meigs, Ph. Mertens, S. Silburn, G. Telesca   +19 more
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