Results 61 to 70 of about 451,392 (162)

Isotope mass dependence of pedestal transport in JET H-mode plasmas

Nuclear Fusion, 2023
We present a comparative transport analysis of the isotope mass dependence in the pedestal of two pairs of deuterium/hydrogen type I ELMy H-mode discharges in JET with ITER-like wall, one characterized by the same input power, the other one by the same ...
I. Predebon, D.R. Hatch, L. Frassinetti, L. Horvath, S. Saarelma, B. Chapman-Oplopoiou, T. Görler, C.F. Maggi, JET Contributors   +8 more
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Role of the separatrix density in the pedestal performance in deuterium low triangularity JET-ILW plasmas and comparison with JET-C

Nuclear Fusion, 2021
A reduction of the pedestal pressure with increasing separatrix density over pedestal density (n e sep/n e ped) has been observed in JET. The physics behind this correlation is investigated. The correlation is due to two distinct mechanisms. The increase
L. Frassinetti, C. Perez von Thun, B. Chapman, A. Fil, J. Hillesheim, L. Horvath, G. Huijsmans, H. Nyström, V. Parail, S. Saarelma, G. Szepesi, B. Viola, R. Bianchetti Morales, M. Dunne, A. Field, J. Flanagan, J. Fontdecaba, D. Hatch, B. Lomanowski, C. Maggi, S. Menmuir, S. Pamela, C. Roach, E. Rachlew, E. Solano, Jet Contributors   +25 more
semanticscholar   +1 more source

A study of the atomic and molecular power loss terms in EDGE2D-EIRENE simulations of JET ITER-like wall L-mode discharges

Nuclear Materials and Energy, 2017
A discrepancy in the divertor radiated powers between EDGE2D-EIRENE simulations and JET-ILW experiments employing a set of NBI-heated L-mode discharges with step-wise density variation is investigated.
K.D. Lawson, M. Groth, D. Harting, S. Menmuir, D. Reiter, S. Brezinsek, G. Corrigan, P. Drewelow, C.F. Maggi, A.G. Meigs, J. Simpson, M.F. Stamp, S. Wiesen, Contributors   +13 more
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Experimental study on the role of the target electron temperature as a key parameter linking recycling to plasma performance in JET-ILW

, 2022
Changes in global and edge plasma parameters (H 98(y,2), dimensionless collisionality ν *, core density peaking, separatrix density n e,sep) with variations in the D2 fueling rate and divertor configuration are unified into a single trend when mapped to ⟨
B. Lomanowski, M. Dunne, N. Vianello, S. Aleiferis, M. Brix, J. Canik, I. Carvalho, L. Frassinetti, D. Frigione, L. Garzotti, M. Groth, A. Meigs, S. Menmuir, M. Maslov, T. Pereira, C. Perez von Thun, M. Reinke, D. Réfy, F. Rimini, G. Rubino, P. Schneider, G. Sergienko, A. Uccello, D. van Eester, Jet Contributors   +24 more
semanticscholar   +1 more source

The Role of Combined ICRF and NBI Heating in JET Hybrid Plasmas in Quest for High D-T Fusion Yield

EPJ Web of Conferences, 2017
Combined ICRF and NBI heating played a key role in achieving the world-record fusion yield in the first deuterium-tritium campaign at the JET tokamak in 1997.
Mantsinen Mervi, Challis Clive, Frigione Domenico, Graves Jonathan, Hobirk Joerg, Belonohy Eva, Czarnecka Agata, Eriksson Jacob, Gallart Dani, Goniche Marc, Hellesen Carl, Jacquet Philippe, Joffrin Emmanuel, King Damian, Krawczyk Natalia, Lennholm Morten, Lerche Ernesto, Pawelec Ewa, Sips George, Solano Emilia R., Tsalas Maximos, Valisa Marco   +21 more
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Low collisionality, peeling limited pedestals in JET-ILW: effect of density and isotope mass on pedestal structure, pedestal stability and pedestal prediction in deuterium and mixed deuterium/tritium plasmas

Nuclear Fusion
Pedestals limited by peeling instabilities have been reached in JET-ILW by operating at high q95, up to q95=8.5. The increase in q95 via the increase of the toroidal field has stabilized the ballooning modes and has allowed to reach high pedestal ...
L. Frassinetti, D. King, S. Saarelma, D. Keeling, C. Perez von Thun, C. Giroud, S. Wiesen, A. Kappatou, N. Vianello, E. Alessi, M. Brix, I. Carvalho, Pedro Carvalho, A. Chomiczewska, J. M. Fontdecaba Climent, E. Giovannozzi, D. Kos, E. Kowalska-Strzęciwilk, B. Labit, M. Lennholm, M. Maslov, Andy Meigs, S. Menmuir, R. Bianchetti Morales, H. Nyström, E. Pawelec, G. Pucella, D. Silvagni, A. Stagni, Hongjuan Sun   +29 more
semanticscholar   +1 more source

Variation in the volumetric power and momentum losses in the JET-ILW scrape-off layer

Nuclear Materials and Energy, 2023
In attaining the cold plasma condition at the divertor target via gas puffing and/or nitrogen seeding, a large variation in the pressure-momentum and cooling losses has, for the first time, been demonstrated on JET with the ITER-like wall, leveraging ...
B. Lomanowski, J. S. Park, L. Aho-Mantila, M. Brix, M. Groth, C. Guillemaut, C. Lowry, S. Marsen, A. Meigs, M. Wischmeier, J. Contributors   +10 more
semanticscholar   +1 more source

The impact of neon seeding on pedestal performance and stability of JET-ILW deuterium H-mode discharges

Plasma Physics and Controlled Fusion
This work presents a systematic study of the impact of neon seeding on pedestal performance and stability in JET-ITER baseline scenario discharges in deuterium at high input power, extending previous JET impurity seeding experiments.
M. Šos, C. Giroud, L. Frassinetti, B. Chapman-Oplopoiou, S. Saarelma, D. King, S. Wiesen, B. Labit, A. Kappatou, D. Keeling, N. Vianello, M. Wischmeier, A. Boboc, J. M. Fontdecaba Climent, Z. Huang, D. Kos, E. Litherland-Smith, J. Macdonald, S. Menmuir, G. Szepesi, I. Team, J. Contributors, the EUROfusion Tokamak Exploitation team   +22 more
semanticscholar   +1 more source

Power balance analysis at the L-H transition in JET-ILW NBI-heated deuterium plasmas

Plasma Physics and Controlled Fusion, 2022
The understanding of the physics underlying the L-H transition has strong implications for ITER experimental reactor and demonstration power plant (DEMO). In many tokamaks, including JET, it has been observed that, at a particular plasma density, n e,min,
P. Vincenzi, E. Solano, E. Delabie, C. Bourdelle, G. Snoep, A. Baciero, G. Birkenmeier, P Carvalho, M. Cavedon, M. Chernyshova, J. Citrin, J. Fontdecaba, J. Hillesheim, A. Huber, C. Maggi, S. Menmuir, F. Parra   +16 more
semanticscholar   +1 more source

Quartz micro-balance results of pulse-resolved erosion/deposition in the JET-ILW divertor

Nuclear Materials and Energy, 2017
A set of quartz crystal microbalances (QMB) was used at JET with full carbon wall to monitor mass erosion/deposition rates in the remote areas of the divertor.
G. Sergienko, H.G. Esser, A. Kirschner, A. Huber, M. Freisinger, S. Brezinsek, A. Widdowson, Ch. Ayres, A. Weckmann, K. Heinola   +9 more
doaj   +1 more source