CRPP / EPFL on the front page of Nuclear Fusion
© 2013 EPFL
CRPP / EPFL appears twice on the front page of the June issue of the specialized journal 'Nuclear Fusion'. First, an image of the inside of the TORPEX facility can be seen. Then the paper on sawtooth control in ITER is highlighted.
The photo of the TORPEX interior clearly shows the copper conductor that has recently been installed in the device. This (large) copper wire generates a poloidal magnetic field that, combined with the already present toroidal magnetic field, forms closed flux surfaces.
The new configurations obtained are similar to those encountered in tokamaks. The results of turbulence studies that can be performed in TORPEX therefore become more representative of the phenomena that take place in the edge of tokamak plasmas.
The paper linked to this image also describes the measurements of currents associated with 'blobs' as well as the results obtained with the mobile system of ion source and detection.
The paper whose title appears on the first page describes the requirements for the heating and current generation systems for the control of the sawtooth oscillations in the future ITER reactor.
The predictions show that 13 MW of microwave power used for local current generation should suffice. However, about 10 MW of additional heating, acting on the ions this time, would ensure the control of sawtooth even in the presence of the fusion-born fast particles.