1 - Nuclear Sciences and Applications - IAEA

IAEA-CN-50/E-I-3 545
0.25 • (a) 10
020
015
005
1°
0075
0050
0-025
0-0
-0025
(b)
o»x mode
240 kW
neao'V)
FIG. 3. (a) Variation of A@p as a junction of ne with the unshifted resonance radius at 1.29 m.
[R = 1.2 m, a = 0.21 m, lp = 100 kA]; (b) as for (a), with the unshifted resonance radius at 1.17 m.
[R = 1.19 m, a = 0.24 m, Ip = 100 kA.] Both (a) and (b) refer to He discharges. The indicated cutoff
density, nc, is calculated from Eq. (1).
analysis of the phase and amplitude of the plasma response as seen by the
SXR diode array and multi-channel ECE. The results for three electron densities
are plotted in Figure 2 together with the unshifted resonance location
(solid line). The region;of absorption obtained from ray tracing calculations
for the appropriate plasma conditions are shown as the shaded areas, and
are in good agreement with the experimental results.
Density Limit to Propagation
The behaviour of A(3P as ne is increased is shown in Figures 3(a) and (b)
for which the unshifted resonant surface was respectively +6 cms and -6
0-8