Assessment techniques for measurement of target erosion/redeposition in large tokamaks
Two techniques are described for the measurement of erosion/redeposition in the new JET divertor. The first of these, colour fringe analysis (CFA), in which the target is viewed with a colour camera, can be used in the study of optically transparent deposited films of up to 1 micron thick. The second, speckle interferometry, is a powerful technique for following changes in surface topology, but its sensitivity of more than 1 micron makes it more suitable for the next generation of tokamaks. The development of both these techniques is described and their feasibility is discussed.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 200 (1993) pp. 360-365
Record Number: 199310997 / Last updated on: 1994-11-29
Original language: en
Available languages: en