Details

Autor(en) / Beteiligte

• Solano, E.R.
• Delabie, E.
• Birkenmeier, G.
• Silva, C.
• Hillesheim, J.C.
• Vincenzi, P.
• Nielsen, A.H.
• Rasmussen, J.Juul
• Baciero, A.
• Aleiferis, S.
• Balboa, I.
• Boboc, A.
• Bourdelle, C.
• Carvalho, I.S.
• Carvalho, P.
• Chernyshova, M.
• Coelho, R.
• Craciunescu, T.
• Dumont, R.
• Dumortier, P.
• Luna, E.de la
• Flanagan, J.
• Fontana, M.
• Fontdecaba, J.M.
• Frassinetti, L.
• Gallart, D.
• Garcia, J.
• Giovannozzi, E.
• Giroud, C.
• Gromelski, W.
• Henriques, R.
• Horvath, L.
• Jacquet, P.
• Jepu, I.
• Kappatou, A.
• Keeling, D.L.
• King, D.
• Kowalska-Strzęciwilk, E.
• Lennholm, M.
• Lerche, E.
• Litherland-Smith, E.
• Kiptily, V.
• Kirov, K.
• Loarte, A.
• Lomanowski, B.
• Maggi, C.F.
• Mantsinen, M.J.
• Manzanares, A.
• Maslov, M.
• Meigs, A.G.
• Monakhov, I.
• Morales, R.B.
• Nina, D.
• Noble, C.
• Parail, V.
• Diaz, F.Parra
• Pawelec, E.
• Pucella, G.
• Réfy, D.
• Righi-Steele, E.
• Rimini, F.G.
• Robinson, T.
• Saarelma, S.
• Sertoli, M.
• Shaw, A.
• Silburn, S.
• Sirén, P.
• Štancar, Ž.
• Sun, H.
• Szepesi, G.
• Taylor, D.
• Tholerus, E.
• Vartanian, S.
• Verdoolaege, G.
• Viola, B.
• Weisen, H.
• Wilson, T.
• Contributors, JET

Titel

Recent progress in L–H transition studies at JET: tritium, helium, hydrogen and deuterium

Ist Teil von

• Nuclear fusion, 2022-07, Vol.62 (7), p.76026

Ort / Verlag

United States: IOP Publishing

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract We present an overview of results from a series of L–H transition experiments undertaken at JET since the installation of the ITER-like-wall (JET-ILW), with beryllium wall tiles and a tungsten divertor. Tritium, helium and deuterium plasmas have been investigated. Initial results in tritium show ohmic L–H transitions at low density and the power threshold for the L–H transition ( P LH ) is lower in tritium plasmas than in deuterium ones at low densities, while we still lack contrasted data to provide a scaling at high densities. In helium plasmas there is a notable shift of the density at which the power threshold is minimum ( n ¯ e , min ) to higher values relative to deuterium and hydrogen references. Above n ¯ e , min (He) the L–H power threshold at high densities is similar for D and He plasmas. Transport modelling in slab geometry shows that in helium neoclassical transport competes with interchange-driven transport, unlike in hydrogen isotopes. Measurements of the radial electric field in deuterium plasmas show that E r shear is not a good indicator of proximity to the L–H transition. Transport analysis of ion heat flux in deuterium plasmas show a non-linearity as density is decreased below n ¯ e , min . Lastly, a regression of the JET-ILW deuterium data is compared to the 2008 ITPA scaling law.