Conveners
Disruptions: EX/9 & TH/7
- Abhijit Sen (Institute for Plasma Research)
Dr
Emmanuel Joffrin
(CEA)
21/10/2016, 14:00
EXS - Magnetic Confinement Experiments: Stability
Oral
Disruption remains the major risk for the operation of ITER and fusion reactors. JET
is now equipped with three fast disruption mitigation valves (DMVs) located at different
poloidal and toroidal locations mimicking the ITER set-up of DMVs. In JET, massive gas
injection (MGI) from one DMV is systematically applied with 90% deuterium and 10%
Argon when a disruption event is detected for...
Mr
nicolas commaux
(oak ridge national laboratory)
21/10/2016, 14:20
EXS - Magnetic Confinement Experiments: Stability
Oral
The shattered pellet injection (SPI) technique has demonstrated disruption thermal quench (TQ) and current quench (CQ) control that scale to meet ITER disruption mitigation requirements. This innovative technique was tested for the last few years on DIII-D and showed improved results when compared to massive gas injection (MGI) technique in comparable conditions. Major disruptions on large...
Dr
yi Liu
(CnSWIP)
21/10/2016, 14:40
EXS - Magnetic Confinement Experiments: Stability
Oral
Disruption mitigation experiments with MGI have been carried out on HL-2A with a rapid (~1 ms), massive (~1021 particles) injection of helium/neon/argon to study various injection scenarios. The behaviors of runaway currents in MGI induced disruptions have been investigated. A long-lasting RE plateau is achieved after argon injection by MGI even at Bt = 1.28 T, much lower than previous Bt...
Dr
Sergey Konovalov
(National Research Centre «Kurchatov Institute», Pl. Kurchatova 1, Moscow 123182, Russia)
21/10/2016, 15:00
THS - Magnetic Confinement Theory and Modelling: Stability
Oral
Substantial fraction of the plasma current can be converted into runaway electron (RE) current in ITER disruptions. During the RE plateau stage of the disruption the kinetic energy of a runaway beam is expected to be much smaller than the magnetic one. However, at the following current termination phase, the electric field induced due to the RE loss to the wall causes the generation of new and...
Dr
Gergely Papp
(Max Planck Institute for Plasma Physics)
21/10/2016, 15:20
EXS - Magnetic Confinement Experiments: Stability
Oral
Disruptions in tokamaks can lead to the generation of a relativistic runaway electron (RE) beam that may cause serious damage to the first wall. The uncontrolled loss of such a high energy electron beam is intolerable and therefore the issue of how to avoid or mitigate the beam generation is of prime importance for ITER. The European medium sized tokamaks ASDEX Upgrade (AUG) and TCV have...
Dr
Lei Xue
(Southwestern Institute of Physics)
21/10/2016, 15:40
THS - Magnetic Confinement Theory and Modelling: Stability
Oral
The medium-sized copper-conductor tokamak HL-2M, is currently under construction and to be put into operation in the near future. The (up-down) symmetric poloidal field coil system inside the toroidal field coils of the machine has the capability of generating high vertically-elongated plasma. Thus the VDE is an unavoidable issue for HL-2M. Meanwhile, the opposite PF current in the middle of...
