1. magnetic confinement - ENEA - Fusione

5. INERTIAL CONFINEMENT 127
Time=0.65 ns
5.3 Theory
-5 -4 -3 -2 -1 0
Log[r(g/cc)]
Time=0.9 ns
Fig. 5.7 - Density maps at
different times and ray
tracing at 0.9 ns when the
second layer impinges on
the third.
-5 -4 -3 -2 -1 0
Log[r(g/cc)]
At 0.9 ns the second foil, and a part of the first, start to impinge on the third. To be
noted that the impinging time of the first foil on the second foil was 0.65 ns, whereas
the collision with the third follows after 0.25 additional nanoseconds. At 0.9 ns a
substantial transverse flow can be seen. Part of the first foil material flows
transversally between the unperturbed remnants of the first and second foil. Due to
this expansion the light succeeds in penetrating near the second foil surface. The ray
trajectories become quite complex and a remarkable transverse light excursion is
noted. In the same figure 5.7 it is represented the detail of the propagation for 10 rays
and, separately, the path of two most external rays.
The computation has been advanced up to t=0.97781ns. At this time the
computational grid becomes severely distort. At any rate many of the most