Experimental investigation of ion cyclotron range of frequencies heating scenarios for ITER's half-field hydrogen phase performed in JET (Articolo in rivista)

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  • Experimental investigation of ion cyclotron range of frequencies heating scenarios for ITER's half-field hydrogen phase performed in JET (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0741-3335/54/7/074008 (literal)
Alternative label
  • Lerche, E [ 1 ] ; Van Eester, D [ 1 ] ; Johnson, TJ [ 2 ] ; Hellsten, T [ 2 ] ; Ongena, J [ 1 ] ; Mayoral, ML [ 3 ] ; Frigione, D [ 4 ] ; Sozzi, C [ 4 ] ; Calabro, G [ 4 ] ; Lennholm, M [ 3 ] ; Beaumont, P [ 3 ] ; Blackman, T [ 3 ] ; Brennan, D [ 3 ] ; Brett, A [ 3 ] ; Cecconello, M [ 7 ] ; Coffey, I [ 3 ] ; Coyne, A [ 3 ] ; Crombe, K [ 1 ] ; Czarnecka, A [ 5 ] ; Felton, R [ 3 ] ; Giroud, C [ 3 ] ; Gorini, G [ 6 ] ; Hellesen, C [ 7 ] ; Jacquet, P [ 3 ] ; Kiptily, V [ 3 ] ; Knipe, S [ 3 ] ; Krasilnikov, A [ 8 ] ; Maslov, M [ 3 ] ; Monakhov, I [ 3 ] ; Noble, C [ 3 ] ; Nocente, M [ 6 ] ; Pangioni, L [ 3 ] ; Proverbio, I [ 6 ] ; Sergienko, G [ 3 ] ; Stamp, M [ 3 ] ; Studholme, W [ 3 ] ; Tardocchi, M [ 6 ] ; Vdovin, V [ 9 ] ; Versloot, T [ 3 ] ; Voitsekhovitch, I [ 3 ] ; Whitehurst, A [ 3 ] ; Wooldridge, E [ 3 ] ; Zoita, V [ 10 ] and JET-EFDA Contributors (2012)
    Experimental investigation of ion cyclotron range of frequencies heating scenarios for ITER's half-field hydrogen phase performed in JET
    in Plasma physics and controlled fusion (Online); IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lerche, E [ 1 ] ; Van Eester, D [ 1 ] ; Johnson, TJ [ 2 ] ; Hellsten, T [ 2 ] ; Ongena, J [ 1 ] ; Mayoral, ML [ 3 ] ; Frigione, D [ 4 ] ; Sozzi, C [ 4 ] ; Calabro, G [ 4 ] ; Lennholm, M [ 3 ] ; Beaumont, P [ 3 ] ; Blackman, T [ 3 ] ; Brennan, D [ 3 ] ; Brett, A [ 3 ] ; Cecconello, M [ 7 ] ; Coffey, I [ 3 ] ; Coyne, A [ 3 ] ; Crombe, K [ 1 ] ; Czarnecka, A [ 5 ] ; Felton, R [ 3 ] ; Giroud, C [ 3 ] ; Gorini, G [ 6 ] ; Hellesen, C [ 7 ] ; Jacquet, P [ 3 ] ; Kiptily, V [ 3 ] ; Knipe, S [ 3 ] ; Krasilnikov, A [ 8 ] ; Maslov, M [ 3 ] ; Monakhov, I [ 3 ] ; Noble, C [ 3 ] ; Nocente, M [ 6 ] ; Pangioni, L [ 3 ] ; Proverbio, I [ 6 ] ; Sergienko, G [ 3 ] ; Stamp, M [ 3 ] ; Studholme, W [ 3 ] ; Tardocchi, M [ 6 ] ; Vdovin, V [ 9 ] ; Versloot, T [ 3 ] ; Voitsekhovitch, I [ 3 ] ; Whitehurst, A [ 3 ] ; Wooldridge, E [ 3 ] ; Zoita, V [ 10 ] and JET-EFDA Contributors (literal)
Pagina inizio
  • 074008 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0741-3335/54/7/074008/pdf/0741-3335_54_7_074008.pdf (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 54 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] TEC Partner, Assoc Euratom Belgian State, LPP ERM KMS, Brussels, Belgium [ 2 ] KTH, Assoc Euratom VR, Stockholm, Sweden [ 3 ] Euratom CCFE Fus Assoc, Culham Sci Ctr, Abingdon, Oxon, England [ 4 ] Euratom ENEA Fus, CR Frascati, Frascati, Italy [ 5 ] Inst Plasma Phys & Laser Microfus, Warsaw, Poland [ 6 ] EURATOM ENEA CNR Assoc, Istituto di Fisica del Plasma, Milan, Italy [ 7 ] Uppsala Univ, Dept Phys & Astron, Assoc EURATOM VR, Uppsala, Sweden [ 8 ] SRC RF Troitsk Inst Innovating & Fus Res, Troitsk, Russia [ 9 ] Nucl Fus Inst, RNC Kurchatov Inst, Moscow, Russia [ 10 ] Assoc EURATOM MEdC, Natl Inst Plasma Phys, Bucharest, Romania [ 11 ] JET EFDA Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England (literal)
Titolo
  • Experimental investigation of ion cyclotron range of frequencies heating scenarios for ITER's half-field hydrogen phase performed in JET (literal)
Abstract
  • Two ion cyclotron range of frequencies ( ICRF) heating schemes proposed for the half-field operation phase of ITER in hydrogen plasmas-fundamental H majority and second harmonic He-3 ICRF heating-were recently investigated in JET. Although the same magnetic field and RF frequencies (f approximate to 42 MHz and f approximate to 52 MHz, respectively) were used, the density and particularly the plasma temperature were lower than those expected in the initial phase of ITER. Unlike for the well-performing H minority heating scheme to be used in He-4 plasmas, modest heating efficiencies (n = P-absorbed/P-launched < 40%) with dominant electron heating were found in both H plasma scenarios studied, and enhanced plasma-wall interaction manifested by high radiation losses and relatively large impurity content in the plasma was observed. This effect was stronger in the He-3 ICRF heating case than in the H majority heating experiments and it was verified that concentrations as high as similar to 20% are necessary to observe significant ion heating in this case. The RF acceleration of the heated ions was modest in both cases, although a small fraction of the 3He ions reached about 260 keV in the second harmonic He-3 heating experiments when 5MW of ICRF power was applied. Considerable RF acceleration of deuterium beam ions was also observed in some discharges of the He-3 heating experiments (where both the second and third harmonic ion cyclotron resonance layers of the D ions are inside the plasma) whilst it was practically absent in the majority hydrogen heating scenario. While hints of improved RF heating efficiency as a function of the plasma temperature and plasma dilution (with He-4) were confirmed in the H majority case, the He-3 concentration was the main handle on the heating efficiency in the second harmonic He-3 heating scenario. (literal)
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