1 - Nuclear Sciences and Applications - IAEA

188 ZARNSTORFF et al.
8
CM
e
CM
E
2 -
(a)
lp=1.4 MA
10 15
(b)
• •
1 - D D
Pjnj = 17 MW
i i
i
•
1
•
ID CD I
1
•
1
I
inj(MW)
1
1 h|
D
1.0 1.4
Ip(MA)
1
p '
•
a
D
i i
•
•
D
a
1 '
•
a
" *i
a Xe
i i
FIG. 3. (a) Variation ofxi and \catr = a/2 with Pinjfor IF = 1.4 MA with well conditioned limiters.
(b) Variation ofxi ana " Xe at r = a ^ w ' tn hf or ^mj = 17 MW with well conditioned limiters.
3. Comparison of Supershot and L-mode Transport
Plasmas with L-mode confinement were previously obtained [14] on TFTR
with gas-loaded limiters, producing a large recycling neutral influx and thus
keeping the edge density high and the edge temperature low. To obtain
this situation without deconditioning the limiter, we injected deuterium neutral
beams into, helium target plasmas of various densities. With a target
ne = 4.4 x 10 19 m~ 3 the confinement time during neutral beam heating was
0.061 sec, while the L-mode prediction is 0.056 sec. The density and temperature
profiles are shown in Fig. 1, and it is seen that the ne profile is broad,
1.8
D-
25