puffing in ELMy H-mode plasmas. Plasma Physics and Controlled Fusion, volume 45,

Neutral penetration through SoL is studied for ELMy H-mode plasma with 2D transport code cocoNUT, which has been developed at JET Joint undertaking. Interaction between the neutral and the transport barrier is investigated, and it is shown that when increasing gas puffing ' sudden increase

of torque input by increasing the available combination of tangential NB units. By making use of these advantages to sustain an internal transport barrier (ITB), the performance of long-pulse ELMy H-mode plasmas was improved in terms of sustained duration time for both high normalized beta (βN) and high

and plasma conditions. As a result the ELM convective losses are found to be a constant fraction of ~5-10 % the pedestal stored energy (Wped). In baseline ELMy H-mode the conductive energy losses vary greatly with collisionality (νe * ) from ~20 % of Wped at νe * <0.1 to ~5 % of Wped at νe *>0

sufficiently small to avoid unbearable side- effects by particle fuelling. An ELM released by the local perturbation imposed by the ablating pellet in the plasma edge region is detected when only a minor fraction (less than 1%) of the fuelling size pellets (containing about 41021D) was ablated and deposited

Abstract The 'stiffness' of thermal transport in ELMy H-modes is examined in a series of carefully chosen JT-60U plasmas, and measured temperatures are compared with the predictions of several transport models. A heating power scan with constant T ped , a scan of pedestal temperature

JET neutron cameras detect both D-D 2.5 MeV and D-T 14 MeV fusion neutrons along 19 lines of sight (see in figure 1). This instrument, unique among similar diagnostics available at large fusion research facilities has a coarse spatial resolution of 15 cm and a time resolution currently of 10ms. Both sets of detectors are absolutely calibrated at 2.5 MeV for D-D and 14

During the last seven years an extensive confinement database has been assembled on JET of steady state ELMy H-mode plasmas. The database was started under the JET Joint Undertaking and has been continued under EFDA with the addition of a further 200 pulses. In this paper the database is used

During the last seven years an extensive confinement database has been assembled on JET of steady state ELMy H-mode plasmas. The database was started under the JET Joint Undertaking and has been continued under EFDA with the addition of a further 200 pulses. In this paper the database is used

burn phase. The operating space available for the 15 MA ELMy H-mode plasma discharges in ITER and upgrades to the PF coils or associated systems to establish confidence that ITER mission objectives can be reached have been identified. Time dependent self-consistent free-boundary calculations were