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Abstract

Knowledge of the density ratios of the hydrogen isotopes is of prime importance in magnetic confinement fusion (MCF). The measurement of n(d+)/n(t+) in the plasma core is listed in category 1 of the diagnostics required for ITER, ie in the category that is considered to be indespensible for machine protection and plasma control. The determination of n(h+)/n(d+) in the plasma core and of n(d+)/n(t+) at the plasma edge is included in 'category 2', ie in the list of measurements for performance evaluation and optimization.

For measurements at the plasma edge a local and time-resolved diagnostic, based on Doppler-free two-photon laser induced resonance fluorescence, has been suggested previously. Here we address the question of whether this method can be extended farther into the plasma bulk by using a neutral diagnostic beam and exploiting the thermal neutrals that are created by charge exchange (CX) between the beam neutrals and the plasma ions.

Additional information

Authors: VOSLAMBER D, CEN Cadarache (FR);MANDL W, CEN Cadarache (FR)
Bibliographic Reference: Article: Diagnostics for Experimental Thermonuclear Fusion Reactors, 2(1998), 381-384
Record Number: 199910798 / Last updated on: 1999-05-28
Category: PUBLICATION
Original language: en
Available languages: en