K. K. KIROV F. AURIEMMA P. J. BONOFIGLO C. D. CHALLIS E. DE LA LUNA J. ERIKSSON D. GALLART J. GARCIA M. GORELENKOVA J. HOBIRK P. JACQUET A. KAPPATOU Y. KAZAKOV D. KEELING D. KING V. KIPTILY E. LERCHE C. MAGGI J. MAILLOUX M. MASLOV M. MANTSINEN P. MANTICA S. MENMUIR R. SHARMA P. SIREN Z. STANCAR D. VAN EESTER JET CONTRIBUTORS
This work studies the influence of RF waves in ICRH range of frequency on fusion alphas during recent JET D-T campaign. Fusion alphas from D-T reactions are born with energies of about 3.5MeV and therefore have significant Doppler shift enabling synergistic interaction between them and RF waves at broad range of frequencies including the ones fo…
PreprintP. A. Schneider C. Angioni F. Auriemma N. Bonanomi T. Görler R. Henriques L. Horvath D. King H. Nyström M. Maslov J. Ruiz G. Szepesi C. Challis E. Delabie J. M. Fontdecaba L. Frassinetti G. Garcia C. Giroud J. Hillesheim J. Hobirk A. Kappatou D. L. Keeling M. Lennholm B. Lomanowski T. Luda di Cortemiglia R. Lorenzini C. F. Maggi S. Menmuir A. Thorman
During the DTE2 campaign in the JET tokamak we performed a parameter scan in T and D-T complementing existing pulses in H and D. For the different main ion masses H-modes at fixed plasma current and magnetic field can have the pedestal pressure varying by a factor of 4 and the total pressure changing from betaN = 1.0 to 3.0. Based on this wide data…
PreprintM Maslov E. Lerche F. Auriemma C.D. Challis A. Chomiczewska A. Dal Molin J. Eriksson J. Garcia J. Hobirk I. Ivanova-Staknik Ph. Jacquet A. Kappatou Y. Kazakov D. Keeling D.B. King V. Kiptily K. Kirov D. Kos R. Lorenzini E. De La Luna C.F. Maggi J. Mailloux P. Mantica M. Marin G. Matthews I. Monakhov M. Nocente G Pucella D. Rigamonti F. Rimini S. Saarelma Z. Stancar H. Sun M. Tardocchi D. Van Eester JET contributors
In JET deuterium-tritium (D-T) plasmas, the fusion power is produced through thermonuclear reactions and reactions between thermal ions and fast particles generated by neutral beam injection (NBI) heating or accelerated by electromagnetic wave heating in the ion cyclotron range of frequencies (ICRF). To complement the experiments with 50/50 D/T …
PreprintŽ. Štancar K. Kirov F. Auriemma H.-T. Kim M. Poradzinski R. Sharma R. Lorenzini Z. Ghani M. Gorelenkova F. Poli A. Boboc S. Brezinsek P. Carvalho F. J. Casson C. Challis E. Delabie D. Van Eester M. Fitzgerald J. M. Fontdecaba J. Garcia L. Garzotti C. Giroud A. Kappatou Y. Kazakov D. King V. Kiptily D. Kos E. Lerche E. Litherland-Smith C. Maggi P. Mantica M. J. Mantsinen M. Maslov S. Menmuir M. Nocente J. Oliver S. Sharapov P. Siren E. R. Solano H. J. Sun G. Szepesi JET Contributors
In the paper we present an overview of interpretive modelling of a database of JET-ILW 2021 D-T discharges using the TRANSP code. Our main aim is to assess our capability of computationally reproducing the fusion performance of various D-T plasma scenarios using different external heating and D-T mixtures, and understand the performance driving mec…
PublishedK K Kirov F. Auriemma R. Bilato C. Challis E. De la Luna J. Garcia J. Hobirk P. Jacquet A. Kappatou Y. Kazakov D. Keeling D. King V. Kiptily E. Lerche C. Maggi J. Mailloux P. Mantica M. Mantsinen M. Maslov R. Sharma Z. Stancar D. Van Eester JET-EFDA contributors
Several Ion Cyclotron Resonance Heating (ICRH) schemes in DT plasma have been considered for the ITER reactor [1]. Most of these heating schemes are minority heating at fundamental frequency. In DT plasma, both reactants can also absorb RF power as majorities at fundamental n=1 or harmonic n=2 frequency. Understanding benefits of directly heatin…
PreprintP.A. Schneider C. Angioni L. Frassinetti L. Horvath M. Maslov F. Auriemma M. Cavedon C.D. Challis E. Delabie M.G. Dunne J.M. Fontdecaba Climent J. Hobirk A. Kappatou D.L. Keeling B. Kurzan M. Lennholm B. Lomanovski C.F. Maggi R.M. McDermott T. Pütterich A. Thorman M. Willensdorfer
Experiments in ASDEX Upgrade (AUG) and JET with the ITER-like wall (JET-ILW) are performed to separate the pedestal and core contributions to confinement in H-modes with different main ion masses. A strong isotope mass dependence in the pedestal is found which is enhanced at high gas puffing. This is because the ELM type changes when going fro…
Preprint PublishedC.D. Challis J. Hobirk A. Kappatou E. Lerche F. Auriemma E.Belonohy I. Coffey J. Eriksson A. Field M.Fontana J.Garcia A. Ho F. Jaulmes D. Keeling D. King K. Kirov M. Lennholm C.Maggi J.Mailloux M. Maslov S. Menmuir G. Pucella E. Rachlew F. Rimini A. Sahlberg A.Sips E. Solano C. Stuart M. Valisa
A key aim of the 2021 JET deuterium-tritium (D-T) experiments was to demonstrate steady high fusion power (10-15MW) with the ITER-like Be/W first wall. Plasmas were developed using D, repeated with T to investigate and mitigate isotope effects, and run with D-T to maximise fusion power. Compared with high current (q95~3) ‘baseline’ plasmas, …
PreprintCF Maggi H Weisen F Casson F Auriemma R Lorenzini H Nordman E. Delabie J Flanagan D Keeling D King L Horvath M Maslov S Menmuir A Salmi PA Schneider G Sips T Tala JET Contributors
Dimensionless experiments test the invariance of plasma physics to changes in the dimensional plasma parameters, when the canonical dimensionless parameters are conserved [1], [2]. Isotope identity experiments exploit the change in isotope ion mass A = mi/mp to obtain plasmas with identical dimensionless profiles in the same tokamak. However, condi…
PreprintH. Weisen C.F. Maggi M. Oberparleiter F.J. Casson S. Menmuir L Horvath F. Auriemma T.W. Bache N. Bonanomi Y. Camenen A. Chankin E. Delabie L. Frassinetti J. Garcia C. Giroud D. King R Lorenzini M. Marin P.A. Schneider P. Siren J. Varje E. Viezzer JET contributors
The isotope dependence of plasma transport has a significant impact on the performance of future D-T experiments in JET and ITER and eventually on the fusion gain and economics of future reactors. In preparation for future D-T operation on JET, dedicated experiments and comprehensive transport analysis were performed in H, D and H-D mixed plasma…
PreprintG. Pucella E. Giovannozzi P. Buratti E. Alessi F. Auriemma D. Brunetti P. J. Lomas S. Nowak C. Sozzi JET Contributors
In this work the mechanisms that can lead to disruptive MHD instabilities in the termination phase of plasma pulses on JET are investigated. It is shown that the broadening or the shrinking of the current density profile, as a consequence of a core hollowing or a edge cooling of the electron temperature profile, can lead to the destabilization o…
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