Investigation of run-away electron beams in the COMPASS tokamak by high-speed cameras

Osnova / Outline:

Run-away electrons are a class of high energetic particles arising in tokamak devices, where they can be deleterious for the plasma facing component integrity. The electron is said to be ‘run away’ when the collisional drag force acting on it becomes smaller than the accelerating force coming from the toroidal electric field. As a consequence, these electrons are accelerated to very high velocities (relativistic) and could carry several tens of MeV in ITER [Hender2007]. Their suppression or mitigation is one of the challenges that have to face nowadays scientists to prevent major damage of the ITER first wall. Experiments with high-speed cameras (up to 400 kfps) in the COMPASS tokamak have allowed to record unique RE beam features (turbulent structures observed as filaments) that can be studied using tomographic technique [Nguyen2012]. The goal of this work is to study some of the RE beam properties using existing Matlab codes, for instance the influence of diverse parameters on the turbulent behavior of the beam.

Content of the work
Learn about runaway electrons and tomography technique
Investigation of physics of plasma turbulence in tokamak plasmas (at COMPASS)
Analysis of camera data using existing codes (Matlab)
Possibly enhance the codes

Content of the work
Learn about runaway electrons and tomography technique
Investigation of physics of plasma turbulence in tokamak plasmas (at COMPASS)
Analysis of camera data using existing codes (Matlab)
Possibly enhance the codes
Literatura / reference:

[Hender2007] Hender T. C. 2007 Nucl. Fusion 47 (6), S128-S202

[Nguyen2012] Nguyen et al. Nucl. Fusion 52 (2012) 013005

Jméno vedoucího / Supervisor name: Dr. Jordan Cavalier
Pracoviště vedoucího / Supervisor office: Institute of Plasma Physics of the Czech Academy of Sciences
Email vedoucího / Supervisor email: cavalier@ipp.cas.cz
Datum zadání / Date of creation: 10.8.2018
Jazyk / Language:
  • Anglicky / English
Výzkumná skupina: Tokamak COMPASS