Plasma wall interaction during ELMs in JET

Gauthier, E.; Andrew, P.; Arnoux, G.; Corre, Y.; Roche, Hélène

doi:10.1016/j.jnucmat.2007.01.262

Cited by 14 publications

(12 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The benefit of N injection for reducing the heat loads is confirmed by the averaged (over transient and stationary phases during the seeding phase) peak heat flux estimated from the IR wide-angle viewing system [18]. On the OSP (tile no 6) the peak heat flux (maximum of the heat flux distribution computed along the surface of the poloidal cross section of the tiles with the 2D non-linear code THEODOR [19]) is reduced by almost a factor of 2 (therefore consistent with the TC data presented above): from Q .…”

Section: Nitrogen ( T Tcmentioning

confidence: 75%

“…In this section (dedicated to the type I ELM regime), we focus therefore our interest on the stationary heat load. The modification of the deposited heat load due to N and D fuelling has been studied using two independent diagnostics, namely, a set of thermocouples embedded into the divertor tiles (this system is very reliable and not perturbed by any carbon surface layer effect, but it measures only the bulk temperature) and the IR wide angle viewing system that measures the surface temperature [18].…”

Section: Effect Of Fuelling On Heat Loadmentioning

confidence: 99%

“…In addition, the signals measured by the lines of sight passing through the core (channel nos [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] are increased by almost a factor of 2 on average. This is consistent with the total bulk radiation that is estimated to be P bulk rad ∼ 2 MW without and P bulk rad ∼ 4 MW with type III ELM obtained with N seeding.…”

Section: Plasma Radiationmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid H-mode scenario with nitrogen seeding and type III ELMs in JET

Corre

Joffrin

Monier‐Garbet

et al. 2008

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

The performance of the 'hybrid' H-mode regime (long pulse operation with high neutron fluency) has been extensively investigated in JET during the [2005][2006][2007] experimental campaign up to normalized pressure β N = 3, toroidal magnetic field B t = 1.7 T, with type I ELMs plasma edge conditions. The optimized external current drive sources, self-generated non-inductive bootstrap current and plasma core stability properties provide a good prospect of achieving a high fusion gain at reduced plasma current for long durations in ITER.One of the remaining issues is the erosion of the divertor target plates associated with the type I ELM regime. regime with a normalized pressure β N = 2.6 (P NBI ∼ 20-22 MW) and a thermal confinement factor of H * 98 (y, 2) ∼ 0.83 has been recently successfully developed on JET with nitrogen seeding. This scenario shows good plasma edge condition (compatible with the future ITER-like wall on JET) and moderate MHD activity. In this paper, we report on the experimental development of the scenario (with plasma current I p = 1.7 MA and magnetic field B t = 1.7 T) and the trade-off between heat load reduction at the target plates and global confinement due to nitrogen seeding and type III ELM working conditions.

show abstract

Section: Nitrogen ( T Tcmentioning

confidence: 75%

Section: Effect Of Fuelling On Heat Loadmentioning

confidence: 99%

Section: Plasma Radiationmentioning

confidence: 99%

See 1 more Smart Citation

Hybrid H-mode scenario with nitrogen seeding and type III ELMs in JET

Corre

Joffrin

Monier‐Garbet

et al. 2008

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…A recent addition to the JET diagnostic set is a wide angle, main chamber viewing IR camera system which supplies some hitherto inaccessible data concerning first wall power loads [19]. Inspection of the IR images obtained in the relatively low triangularity discharges discussed here, reveals essentially no ELM interaction with the upper dump plates and none on the inner wall.…”

Section: Main Wall Energy Loadsmentioning

confidence: 87%

The impact of large ELMs on JET

Pitts¹,

Arnoux²,

Beurskens³

et al. 2009

Journal of Nuclear Materials

Self Cite

View full text Add to dashboard Cite

“…The JET wide angle IR thermography was used to determine the surface temperatures in the divertor [4]. The system was operating with a 4.2-4.4 lm band filter at 50 Hz.…”

Section: Diagnostics and Methodsmentioning

confidence: 99%