Conveners
Runaway, Disruption & RF Physics: EX/5 & TH/4
- Baonian Wan (China)
Mr
Robert Granetz
(USA)
16/10/2014, 10:45
Oral
Results from an ITPA joint study of the threshold conditions for runaway electron (RE) generation suggest that suppression of RE’s during disruptions on ITER could be less demanding than currently envisioned. In this study of quiescent, non-disrupting discharges, it is found that generating and maintaining measurable RE’s is more difficult than predicted by collisional damping only,...
Ms
Valerie A. Izzo
(USA)
16/10/2014, 11:05
Oral
Massive gas injection (MGI) is a leading candidate technology for disruption mitigation in ITER, and recent modeling has suggested that MHD modes play a critical role in determining the distribution of radiated power during an MGI shutdown. NIMROD 3D MHD simulations of MGI in both ITER and DIII-D reveal how the distribution of gas jets and the n=1 mode interact to determine the localization of...
Mr
Cedric Reux
(France)
16/10/2014, 11:25
Oral
Disruptions are a major concern for next generation tokamaks, including ITER. These MHD instabilities lead to the loss of the plasma thermal energy and current on the millisecond timescale. Large electric fields created by the plasma current quench can accelerate several MA of runaway electrons (RE) up to 20 MeV. The influence of the full-metal JET ITER-Like Wall (JET-ILW) on RE is thus a key...
Mr
Rakesh L. Tanna
(India)
16/10/2014, 11:45
Oral
ADITYA tokamak is engaged in carrying out several dedicated experiments on runaway mitigation, disruption control etc. which are of utmost importance for the successful operation of large size tokamaks, such as ITER. Runaway electron generation and mitigation remains challenging topic in the present tokamak research, as these high-energetic electrons can cause severe damage to the vacuum...
Mr
Alexei Popov
(Russian Federation)
16/10/2014, 12:05
Oral
In the paper the universal scenarios of the low-threshold parametric decay instabilities (PDIs), explaining the anomalous phenomena being already observed [1,2] and potentially important for the energy budget in the future ECRH experiments, are treated.
We investigate the scenario of a low-threshold absorptive PDI [3] based on the parametric excitation of the electron Bernstein wave 3D...
