75 results on '"McClements, K.G."'
Search Results
52. Fast particle effects on the sawtooth stability of JET DT discharges*
- Author
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Nave, M.F.F, primary, Gorelenkov, N.N, additional, McClements, K.G, additional, Allfrey, S.J, additional, Balet, B, additional, Borba, D.N, additional, Lomas, P.J, additional, Manickam, J, additional, Jones, T.T.C, additional, and Thomas, P.R, additional
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- 2002
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53. Quasi-stationary high plasmas and fast particle instabilities in the COMPASS-D tokamak with ECRH and LHCD
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Valovic, M, primary, Lloyd, B, additional, McClements, K.G, additional, Warrick, C.D, additional, Fielding, S.J, additional, Morris, A.W, additional, Pinfold, T, additional, Wilson, H.R, additional, Team, COMPASS-D, additional, and Team, ECRH, additional
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- 2000
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54. Steady state operation of spherical tokamaks
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Akers, R.J, primary, Bond, A, additional, Buttery, R.J, additional, Carolan, P.G, additional, Counsell, G.F, additional, Cunningham, G, additional, Fielding, S.J, additional, Gimblett, C.G, additional, Gryaznevich, M, additional, Hastie, R.J, additional, Helander, P, additional, Hender, T.C, additional, Knight, P.J, additional, Lashmore-Davies, C.N, additional, Maddison, G.P, additional, Martin, T.J, additional, McClements, K.G, additional, Morris, A.W, additional, O'Brien, M.R, additional, Ribeiro, C, additional, Roach, C.M, additional, Robinson, D.C, additional, Sykes, A, additional, Voss, G.M, additional, Walsh, M.J, additional, Wilson, H.R, additional, and Zaitsev, F.S, additional
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- 2000
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55. Electron acceleration in the aurora and beyond
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McClements, K.G, primary
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- 1999
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56. Interpretation of measurements of ICRF heated minority proton distributions in JET
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McClements, K.G, primary, Dendy, R.O, additional, and Gondhalekar, A, additional
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- 1997
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- View/download PDF
57. Ion cyclotron harmonic waves in the equatorial magnetosphere
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McClements, K.G, primary
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- 1996
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58. Alfvenic behaviour of alpha particle driven ion cyclotron emission in TFTR
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Cauffman, S, primary, Majeski, R, additional, McClements, K.G, additional, and Dendy, R.O, additional
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- 1995
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59. Stabilization of the ideal m=1 internal kink by alpha particles and ICRF heated ions
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McClements, K.G, primary, Dendy, R.O, additional, Gimblett, C.G, additional, Hastie, R.J, additional, and Martin, T.J, additional
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- 1995
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60. Ion cyclotron emission due to collective instability of fusion products and beam ions in TFTR and JET
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Dendy, R.O, primary, McClements, K.G, additional, Lashmore-Davies, C.N, additional, Cottrell, G.A, additional, Majeski, R, additional, and Cauffman, S, additional
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- 1995
- Full Text
- View/download PDF
61. Ion cyclotron emission measurements during JET deuterium-tritium experiments
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Cottrell, G.A, primary, Bhatnagar, V.P, additional, Costa, O. Da, additional, Dendy, R.O, additional, Jacquinot, J, additional, McClements, K.G, additional, McCune, D.C, additional, Nave, M.F.F, additional, Smeulders, P, additional, and Start, D.F.H, additional
- Published
- 1993
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62. The effects of magnetic geometry on electron confinement in solar flares
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McClements, K.G., primary
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- 1991
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63. Experiment on collisionless plasma interaction with applications to supernova remnant physics.
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Courtois, C., Grundy, R.A.D., Ash, A.D., Chambers, D.M., Woolsey, N.C., Dendy, R.O., and McClements, K.G.
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COLLISIONLESS plasmas ,PLASMA gases ,SUPERNOVA remnants ,SUPERNOVAE ,PHYSICS ,MAGNETIC fields - Abstract
Results from an experimental study of the collisionless interaction of two laser-produced plasmas in a magnetic field with applications to supernova remnant shock physics are presented. The dynamics of the two plasmas and their interaction are studied with and without magnetic field through spatially and temporally resolved measurements of the electron density. Experimental results show that counter-propagating collisionless plasmas interpenetrate when no magnetic field is present. In contrast, results obtained with the addition of a 7.5 T magnetic field perpendicular to plasma flow show density features in the interaction area that only occur when the field is present. The reason for this remains uncertain. It is suggested that this results from an increase in the effective collisionality as the magnetic field reduces the ion and electron gyroradius below the size of the experiment. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]
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- 2004
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64. Azimuthally symmetric magnetohydrodynamic and two-fluid equilibria with arbitrary flows.
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McClements, K.G. and Thyagaraja, A.
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MAGNETOHYDRODYNAMICS , *LIQUID-liquid equilibrium , *POISSON processes - Abstract
Magnetohydrodynamic (MHD) and two-fluid quasi-neutral equilibria with azimuthal symmetry, gravity and arbitrary ratios of (non-relativistic) flow speed to acoustic and Alfvén speeds are investigated. In the two-fluid case, the mass ratio of the two species is arbitrary, and the analysis is therefore applicable to electron–positron plasmas. The methods of derivation can be extended in an obvious manner to several charged species. Generalized Grad–Shafranov equations, describing the equilibrium magnetic field, are derived. Flux-function equations and Bernoulli relations for each species, together with Poisson's equation for the gravitational potential, complete the set of equations required to determine the equilibrium. These are straightforward to solve numerically. The two-fluid system, unlike the MHD system, is shown to be free of singularities. It is demonstrated analytically that there exists a class of incompressible MHD equilibria with magnetic field-aligned flow. A special subclass first identified by S. Chandrasekhar, in which the flow speed is everywhere equal to the local Alfvén speed, is compatible with virtually any azimuthally symmetric magnetic configuration. Potential applications of this analysis include extragalactic and stellar jets, accretion discs, and plasma structures associated with active late-type stars. [ABSTRACT FROM AUTHOR]
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- 2001
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65. Modeling of sawtooth destabilization during radio-frequency heating experiments in tokamak plasmas.
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McClements, K.G., Dendy, R.O., Hastie, R.J., and Martin, T.J.
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CYCLOTRON resonance , *DISTRIBUTION (Probability theory) - Abstract
Reports on the stabilization of sawtooth oscillations in tokamaks using ion cyclotron resonance heating (ICRH). Use of an analytical model for the distribution function of heated minority ions to computer the energy associated with internal kink displacements; Stabilizing influence of minority ions.
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- 1996
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66. Interpretation of ion cyclotron emission from sub-Alfvenic fusion products in the Tokamak Fusion...
- Author
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McClements, K.G., Dendy, R.O., Lashmore-Davies, C.N., Cottrell, G.A., Cauffman, S., and Majeski, R.
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TOKAMAKS , *CYCLOTRONS , *FUSION (Phase transformation) , *MAGNETOHYDRODYNAMIC waves - Abstract
Studies ion cyclotron emission during neutral beam-heated supershots in the Tokamak Fusion Test Reactor deuterium-tritium campaign at fusion product cyclotron harmonics. Emission from the outer midplane edge plasma; Magnetoacoustic cyclotron instability resulting in the generation of propagating fast Alfven waves at fusion product cyclotron harmonics.
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- 1996
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67. The influence of fast ions on the magnetohydrodynamic stability of negative shear profiles.
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Helander, P., Gimblett, C.G., Hastie, R.J., and McClements, K.G.
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TOKAMAKS ,IONS ,PLASMA gases - Abstract
Investigates the influence of energetic ions on the stability of ideal double kink modes in a tokamak plasma with negative magnetic shear. Discovery that fast ions play a similar role as for the ordinary internal kink; Phenomena analogous to sawtooth stabilization and fishbone excitation.
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- 1997
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68. A model of ideal m=1 internal kink stabilization by minority ion cyclotron resonant heating.
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Dendy, R. O., Hastie, R. J., McClements, K.G., and Martin, T.J.
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PLASMA gases ,ION cyclotron resonance spectrometry ,ANISOTROPY - Abstract
Determines the effect of ion cyclotron resonant heating (ICRH) on the stability of m=1 internal link displacements in the low-frequency limit. Association of displacements with sawtooth oscillations. Contribution of the plasma energy of the ICRH-heated minority ion population with strong temperature anisotropy.
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- 1995
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69. The excitation of obliquely propagating fast Alfven waves at fusion ion cyclotron harmonics.
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Dendy, R.O., Lashmore-Davies, C.N., McClements, K.G., and Cottrell, G.A.
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CYCLOTRONS ,HARMONIC analysis (Mathematics) ,TOKAMAKS ,MAGNETOHYDRODYNAMIC waves - Abstract
Discusses the generalization of the proposed theory of the magnetoacoustic cyclotron instability to include finite parallel wave number. View of the theory as a mechanism for suprathermal ion cyclotron harmonic emission observed in large tokamaks; Cyclotron resonant interactions of fast Alfven wave with thermal and fusion ions.
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- 1994
- Full Text
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70. Modelling of sawtooth stabilization by beam-injected energetic particles in JET
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McClements, K.G., Angioni, C., Budny, R., Pochelon, A., and Sauter, O.
71. Analysis of ion cyclotron heating and current drive at omega approximate to 2 omega(cH) for sawtooth control in JET plasmas
- Author
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Mantsinen, M.J., Angioni, C., Eriksson, L.G., Gondhalekar, A., Hellsten, T., Johnson, T., Mayoral, M.L., McClements, K.G., Nave, MF F, Nguyen, F., Podda, S., Rapp, J., Sauter, O., Sharapov, S.E., and Westerhof, E.
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Physics::Plasma Physics ,JET - Abstract
Ion cyclotron heating and current drive at omega approximate to 2omega(cH) in JET deuterium plasmas with a hydrogen concentration n(H)/(n(D)+n(H)) in the range of 5-15% are analysed, comparing results of numerical computer modelling with experiments. Second harmonic hydrogen damping is found to be maximized by placing the resonance on the, low-field side (LFS) of the torus, which minimizes competing direct electron damping and parasitic high-harmonic D damping in the presence of D beams. The shape of the calculated current perturbation and the radial localization of the heating power density for the LFS resonance are consistent with the experimentally observed evolution of the sawtooth period when the resonance layer moves near the q = 1 surface. Since the calculated driven current is dominated by a current of diamagnetic type caused by finite orbit widths of trapped resonating ions, it is not too sensitive to the ICRF phasing. Control of sawteeth with ion cyclotron current drive using the LFS omega approximate to 2omega(cH) resonance in the present experimental conditions can thus be best obtained by varying the resonance location rather than the ICRF phasing. Due to differences in fast ion orbits, collisional electron heating and fast ion pressure profiles are significantly more peaked for a LFS resonance than for a high-field side (HFS) resonance. For the HFS omega approximate to 2omega(cH) resonance, an enhanced neutron rate is observed in the presence of D beam ions, which is consistent with parasitic D damping at the omega approximate to 2omega(cD) resonance in the plasma centre.
72. Sawtooth stabilisation by neutral beam-injected fast ions in JET
- Author
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Pochelon, A., Angioni, C., Matsinen, M., Gorenlenkov, N., McClements, K.G., Budny, R., de.Vries, P.C., Howell, D.F., M.F.F., Nave, Sauter, O., and Sharapov, S.
73. Neutral beam stabilization of sawtooth oscillations in JET
- Author
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Angioni, C., Pochelon, A., Gorelenkov, N.N., McClements, K.G, Sauter, O., Budny, R.V., de Vries, P.C., Howell, D.F., Mantsinen, M., Nave, M.F.F., and Sharapov, S.E.
- Subjects
LRP 705 ,Physics::Plasma Physics ,JET ,ITER - Abstract
Recent experiments in the Joint European Torus (JET) have provided evidence of sawtooth stabilization by fast ions arising from deuterium neutral beam injection (NBI). A possible theoretical basis for the interpretation of the observed sawtooth period behaviour is investigated and predictions are compared with experimental results, using a sawtooth period model developed to predict the sawtooth period in the International Thermonuclear Experimental Reactor (ITER). Unlike the case of ion cyclotron resonance heating, a detailed comparison between theory and experiment for NBI has not yet been made. In the model employed in this paper, a beam ion contribution to the internal kink potential energy has been incorporated, using a simple analytical expression valid in the limit of isotropic fast particles. This analytical expression has been found to compare well with detailed calculations performed with a hybrid kinetic/MHD code NOVA-K, using fast particle distribution functions computed with a plasma analysis code TRANSP. The beam ion contribution has been implemented in a transport code PRETOR and a few representative JET discharges have been analysed and modelled. The beam ion term is found to be sufficiently stabilizing to produce simulated sawtooth periods in agreement with the experimental results. Sawtooth periods computed without taking this term into account are much shorter than the measured periods. The model indicates that sawteeth are triggered in these JET discharges by excitation of the internal kink in the semi-collisional ion-kinetic regime: this was found by previous authors to be the sawtooth trigger most likely to be relevant to ITER. The role of beam ions in determining the sawtooth period in JET is thus found to be similar to the predicted role of alpha-particles in ITER.
74. Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
- Author
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Joffrin, E., Abduallev, S., Abhangi, M., Abreu, P., Afanasev, V., Afzal, M., Aggarwal, K.M., Ahlgren, T., Aho-Mantila, L., Aiba, N., Airila, M., Alarcon, T., Albanese, R., Alegre, D., Aleiferis, S., Alessi, E., Aleynikov, P., Alkseev, A., Allinson, M., Alper, B., Alves, E., Ambrosino, G., Ambrosino, R., Amosov, V., Andersson Sundén, E., Andrews, R., Angelone, M., Anghel, M., Angioni, C., Appel, L., Appelbee, C., Arena, P., Ariola, M., Arshad, S., Artaud, J., Arter, W., Ash, A., Ashikawa, N., Aslanyan, V., Asunta, O., Asztalos, O., Auriemma, F., Austin, Y., Avotina, L., Axton, M., Ayres, C., Baciero, A., Baião, D., Balboa, I., Balden, M., Balshaw, N., Bandaru, V.K., Banks, J., Baranov, Y.F., Barcellona, C., Barnard, T., Barnes, M., Barnsley, R., Baron Wiechec, A., Barrera Orte, L., Baruzzo, M., Basiuk, V., Bassan, M., Bastow, R., Batista, A., Batistoni, P., Baumane, L., Bauvir, B., Baylor, L., Beaumont, P.S., Beckers, M., Beckett, B., Bekris, N., Beldishevski, M., Bell, K., Belli, F., Belonohy, É., Benayas, J., Bergsåker, H., Bernardo, J., Bernert, M., Berry, M., Bertalot, L., Besiliu, C., Betar, H., Beurskens, M., Bielecki, J., Biewer, T., Bilato, R., Biletskyi, O., Bílková, P., Binda, F., Birkenmeier, G., Bizarro, J.P.S., Björkas, C., Blackburn, J., Blackman, T.R., Blanchard, P., Blatchford, P., Bobkov, V., Boboc, A., Bogar, O., Bohm, P., Bohm, T., Bolshakova, I., Bolzonella, T., Bonanomi, N., Boncagni, L., Bonfiglio, D., Bonnin, X., Boom, J., Borba, D., Borodin, D., Borodkina, I., Boulbe, C., Bourdelle, C., Bowden, M., Bowman, C., Boyce, T., Boyer, H., Bradnam, S.C., Braic, V., Bravanec, R., Breizman, B., Brennan, D., Breton, S., Brett, A., Brezinsek, S., Bright, M., Brix, M., Broeckx, W., Brombin, M., Brosławski, A., Brown, B., Brunetti, D., Bruno, E., Buch, J., Buchanan, J., Buckingham, R., Buckley, M., Bucolo, M., Budny, R., Bufferand, H., Buller, S., Bunting, P., Buratti, P., Burckhart, A., Burroughes, G., Buscarino, A., Busse, A., Butcher, D., Butler, B., Bykov, I., Cahyna, P., Calabrò, G., Calacci, L., Callaghan, D., Callaghan, J., Calvo, I., Camenen, Y., Camp, P., Campling, D.C., Cannas, B., Capat, A., Carcangiu, S., Card, P., Cardinali, A., Carman, P., Carnevale, D., Carr, M., Carralero, D., Carraro, L., Carvalho, B.B., Carvalho, I., Carvalho, P., Carvalho, D.D., Casson, F.J., Castaldo, C., Catarino, N., Causa, F., Cavazzana, R., Cave-Ayland, K., Cavedon, M., Cecconello, M., Ceccuzzi, S., Cecil, E., Challis, C.D., Chandra, D., Chang, C.S., Chankin, A., Chapman, I.T., Chapman, B., Chapman, S.C., Chernyshova, M., Chiariello, A., Chitarin, G., Chmielewski, P., Chone, L., Ciraolo, G., Ciric, D., Citrin, J., Clairet, F., Clark, M., Clark, E., Clarkson, R., Clay, R., Clements, C., Coad, J.P., Coates, P., Cobalt, A., Coccorese, V., Cocilovo, V., Coelho, R., Coenen, J.W., Coffey, I., Colas, L., Colling, B., Collins, S., Conka, D., Conroy, S., Conway, N., Coombs, D., Cooper, S.R., Corradino, C., Corre, Y., Corrigan, G., Coster, D., Craciunescu, T., Cramp, S., Crapper, C., Crisanti, F., Croci, G., Croft, D., Crombé, K., Cruz, N., Cseh, G., Cufar, A., Cullen, A., Curson, P., Curuia, M., Czarnecka, A., Czarski, T., Cziegler, I., Dabirikhah, H., Dal Molin, A., Dalgliesh, P., Dalley, S., Dankowski, J., Darrow, D., David, P., Davies, A., Davis, W., Dawson, K., Day, I., Day, C., De Bock, M., De Castro, A., De Dominici, G., De La Cal, E., De La Luna, E., De Masi, G., De Temmerman, G., De Tommasi, G., De Vries, P., Deane, J., Dejarnac, R., Del Sarto, D., Delabie, E., Demerdzhiev, V., Dempsey, A., Den Harder, N., Dendy, R.O., Denis, J., Denner, P., Devaux, S., Devynck, P., Di Maio, F., Di Siena, A., Di Troia, C., Dickinson, D., Dinca, P., Dittmar, T., Dobrashian, J., Doerk, H., Doerner, R.P., Domptail, F., Donné, T., Dorling, S.E., Douai, D., Dowson, S., Drenik, A., Dreval, M., Drewelow, P., Drews, P., Duckworth, Ph., Dumont, R., Dumortier, P., Dunai, D., Dunne, M., Ďuran, I., Durodié, F., Dutta, P., Duval, B.P., Dux, R., Dylst, K., Edappala, P.V., Edwards, A.M., Edwards, J.S., Eich, Th., Eidietis, N., Eksaeva, A., Ellis, R., Ellwood, G., Elsmore, C., Emery, S., Enachescu, M., Ericsson, G., Eriksson, J., Eriksson, F., Eriksson, L.G., Ertmer, S., Esquembri, S., Esquisabel, A.L., Esser, H.G., Ewart, G., Fable, E., Fagan, D., Faitsch, M., Falie, D., Fanni, A., Farahani, A., Fasoli, A., Faugeras, B., Fazinić, S., Felici, F., Felton, R.C., Feng, S., Fernades, A., Fernandes, H., Ferreira, J., Ferreira, D.R., Ferrò, G., Fessey, J.A., Ficker, O., Field, A., Fietz, S., Figini, L., Figueiredo, J., Figueiredo, A., Fil, N., Finburg, P., Fischer, U., Fittill, L., Fitzgerald, M., Flammini, D., Flanagan, J., Flinders, K., Foley, S., Fonnesu, N., Fontdecaba, J.M., Formisano, A., Forsythe, L., Fortuna, L., Fransson, E., Frasca, M., Frassinetti, L., Freisinger, M., Fresa, R., Fridström, R., Frigione, D., Fuchs, V., Fusco, V., Futatani, S., Gál, K., Galassi, D., Gałązka, K., Galeani, S., Gallart, D., Galvão, R., Gao, Y., Garcia, J., Garcia-Carrasco, A., García-Muñoz, M., Gardener, M., Garzotti, L., Gaspar, J., Gaudio, P., Gear, D., Gebhart, T., Gee, S., Geiger, B., Gelfusa, M., George, R., Gerasimov, S., Gervasini, G., Gethins, M., Ghani, Z., Ghate, M., Gherendi, M., Ghezzi, F., Giacalone, J.C., Giacomelli, L., Giacometti, G., Gibson, K., Giegerich, T., Gil, L., Gilbert, M.R., Gin, D., Giovannozzi, E., Giroud, C., Glöggler, S., Goff, J., Gohil, P., Goloborod’ko, V., Goloborodko, V., Gomes, R., Gonçalves, B., Goniche, M., Goodyear, A., Gorini, G., Görler, T., Goulding, R., Goussarov, A., Graham, B., Graves, J.P., Greuner, H., Grierson, B., Griffiths, J., Griph, S., Grist, D., Groth, M., Grove, R., Gruca, M., Guard, D., Guérard, C., Guillemaut, C., Guirlet, R., Gulati, S., Gurl, C., Gutierrez-Milla, A., Utoh, H.H., Hackett, L., Hacquin, S., Hager, R., Hakola, A., Halitovs, M., Hall, S., Hallworth-Cook, S., Ham, C., Hamed, M., Hamilton, N., Hamlyn-Harris, C., Hammond, K., Hancu, G., Harrison, J., Harting, D., Hasenbeck, F., Hatano, Y., Hatch, D.R., Haupt, T., Hawes, J., Hawkes, N.C., Hawkins, J., Hawkins, P., Hazel, S., Heesterman, P., Heinola, K., Hellesen, C., Hellsten, T., Helou, W., Hemming, O., Hender, T.C., Henderson, S.S., Henderson, M., Henriques, R., Hepple, D., Herfindal, J., Hermon, G., Hidalgo, C., Higginson, W., Highcock, E.G., Hillesheim, J., Hillis, D., Hizanidis, K., Hjalmarsson, A., Ho, A., Hobirk, J., Hogben, C.H.A., Hogeweij, G.M.D., Hollingsworth, A., Hollis, S., Hölzl, M., Honore, J.-J., Hook, M., Hopley, D., Horáček, J., Hornung, G., Horton, A., Horton, L.D., Horvath, L., Hotchin, S.P., Howell, R., Hubbard, A., Huber, A., Huber, V., Huddleston, T.M., Hughes, M., Hughes, J., Huijsmans, G.T.A., Huynh, P., Hynes, A., Igaune, I., Iglesias, D., Imazawa, N., Imríšek, M., Incelli, M., Innocente, P., Ivanova-Stanik, I., Ivings, E., Jachmich, S., Jackson, A., Jackson, T., Jacquet, P., Jansons, J., Jaulmes, F., Jednoróg, S., Jenkins, I., Jepu, I., Johnson, T., Johnson, R., Johnston, J., Joita, L., Joly, J., Jonasson, E., Jones, T., Jones, C., Jones, L., Jones, G., Jones, N., Juvonen, M., Hoshino, K.K., Kallenbach, A., Kalsey, M., Kaltiaisenaho, T., Kamiya, K., Kaniewski, J., Kantor, A., Kappatou, A., Karhunen, J., Karkinsky, D., Kaufman, M., Kaveney, G., Kazakov, Y., Kazantzidis, V., Keeling, D.L., Keenan, F.P., Kempenaars, M., Kent, O., Kent, J., Keogh, K., Khilkevich, E., Kim, H.-T., Kim, H.T., King, R., King, D., Kinna, D.J., Kiptily, V., Kirk, A., Kirov, K., Kirschner, A., Kizane, G., Klas, M., Klepper, C., Klix, A., Knight, M., Knight, P., Knipe, S., Knott, S., Kobuchi, T., Köchl, F., Kocsis, G., Kodeli, I., Koechl, F., Kogut, D., Koivuranta, S., Kolesnichenko, Y., Kollo, Z., Kominis, Y., Köppen, M., Korolczuk, S., Kos, B., Koslowski, H.R., Kotschenreuther, M., Koubiti, M., Kovaldins, R., Kovanda, O., Kowalska-Strzęciwilk, E., Krasilnikov, A., Krasilnikov, V., Krawczyk, N., Kresina, M., Krieger, K., Krivska, A., Kruezi, U., Książek, I., Kukushkin, A., Kundu, A., Kurki-Suonio, T., Kwak, S., Kwon, O.J., Laguardia, L., Lahtinen, A., Laing, A., Lalousis, P., Lam, N., Lamb, C., Lambertz, H.T., Lang, P.T., Lanthaler, S., Lascas Neto, E., Łaszyńska, E., Lawless, R., Lawson, K.D., Lazaros, A., Lazzaro, E., Leach, R., Learoyd, G., Leerink, S., Lefebvre, X., Leggate, H.J., Lehmann, J., Lehnen, M., Leichauer, P., Leichtle, D., Leipold, F., Lengar, I., Lennholm, M., Lepiavko, B., Leppänen, J., Lerche, E., Lescinskis, A., Lescinskis, B., Lesnoj, S., Leyland, M., Leysen, W., Li, Y., Li, L., Liang, Y., Likonen, J., Linke, J., Linsmeier, Ch., Lipschultz, B., Litaudon, X., Liu, G., Lloyd, B., Lo Schiavo, V.P., Loarer, T., Loarte, A., Lomanowski, B., Lomas, P.J., Lönnroth, J., López, J.M., Lorenzini, R., Losada, U., Loughlin, M., Lowry, C., Luce, T., Lucock, R., Lukin, A., Luna, C., Lungaroni, M., Lungu, C.P., Lungu, M., Lunniss, A., Lunt, T., Lupelli, I., Lutsenko, V., Lyssoivan, A., Macheta, P., Macusova, E., Magesh, B., Maggi, C., Maggiora, 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- Subjects
13. Climate action ,JET ,tritium ,fusion power ,isotope ,7. Clean energy - Abstract
For the past several years, the JET scientific programme (Pamela et al 2007 Fusion Eng. Des. 82 590) has been engaged in a multi-campaign effort, including experiments in D, H and T, leading up to 2020 and the first experiments with 50%/50% D–T mixtures since 1997 and the first ever D–T plasmas with the ITER mix of plasma-facing component materials. For this purpose, a concerted physics and technology programme was launched with a view to prepare the D–T campaign (DTE2). This paper addresses the key elements developed by the JET programme directly contributing to the D–T preparation. This intense preparation includes the review of the physics basis for the D–T operational scenarios, including the fusion power predictions through first principle and integrated modelling, and the impact of isotopes in the operation and physics of D–T plasmas (thermal and particle transport, high confinement mode (H-mode) access, Be and W erosion, fuel recovery, etc). This effort also requires improving several aspects of plasma operation for DTE2, such as real time control schemes, heat load control, disruption avoidance and a mitigation system (including the installation of a new shattered pellet injector), novel ion cyclotron resonance heating schemes (such as the threeions scheme), new diagnostics (neutron camera and spectrometer, active Alfvèn eigenmode antennas, neutral gauges, radiation hard imaging systems…) and the calibration of the JET neutron diagnostics at 14 MeV for accurate fusion power measurement. The active preparation of JET for the 2020 D–T campaign provides an incomparable source of information and a basis for the future D–T operation of ITER, and it is also foreseen that a large number of key physics issues will be addressed in support of burning plasmas.
75. Plasma Wave Generation by Thick Target Electron Beams in Solar Flares
- Author
-
McClements, K.G., primary
- Published
- 1989
- Full Text
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