Global and pedestal confinement in JET with a Be/W metallic wall

0435986 - ÚFP 2015 RIV AT eng J - Článek v odborném periodiku
Beurskens, M.N.A. - Frassinetti, L. - Challis, C. - Giroud, C. - Saarelma, S. - Alper, B. - Angioni, C. - Bílková, Petra - Bourdelle, C. - Brezinsek, S. - Buratti, P. - Calabrò, G. - Eich, E. - Flanagan, J. - Giovannozzi, E. - Groth, M. - Hobirk, J. - Joffrin, E. - Leyland, M.J. - Lomas, P. - De La Luna, E. - Kempenaars, M. - Maddison, G. - Maggi, C. - Mantica, P. - Maslov, M. - Matthews, G. - Mayoral, M.-L. - Neu, R. - Nunes, I. - Osborne, T. - Rimini, F. - Scannell, R. - Solano, E.R. - Snyder, P.B. - Voitsekhovitch, I. - de Vries, P. … celkem 38 autorů
Global and pedestal confinement in JET with a Be/W metallic wall.
Nuclear Fusion. Roč. 54, č. 4 (2014), 043001-043001. ISSN 0029-5515. E-ISSN 1741-4326
Institucionální podpora: RVO:61389021
Klíčová slova: pedestal * confinement * nitrogen * radiation * tokamak * metal wall
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 3.062, rok: 2014
http://iopscience.iop.org/0029-5515/54/4/043001/pdf/0029-5515_54_4_043001.pdf

Type I ELMy H-mode operation in JET with the ITER-like Be/W wall (JET-ILW) generally occurs at lower pedestal pressures compared to those with the full carbon wall (JET-C). The pedestal density is similar but the pedestal temperature where type I ELMs occur is reduced and below to the so-called critical type I-type III transition temperature reported in JET-C experiments. Furthermore, the confinement factor H-98(y,H- 2) in type I ELMy H-mode baseline plasmas is generally lower in JET-ILWcompared to JET-C at low power fractions Ploss/P-thr,(08)< 2 (where P-loss is (P-in-dW/dt), and P-thr,(08) the L-H power threshold from Martin et al 2008 (J. Phys. Conf. Ser. 123 012033)). Higher power fractions have thus far not been achieved in the baseline plasmas.At Ploss/P-thr,P- 08 > 2, the confinement in JET-ILW hybrid plasmas is similar to that in JET-C.A reduction in pedestal pressure is the main reason for the reduced confinement in JET-ILW baseline ELMy H-mode plasmas where typically H-98
Trvalý link: http://hdl.handle.net/11104/0239768