Z-Pinch Driven Isentropic Compression for Inertial Fusion Page: 16 of 29
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strong shock is launched into the fuel too early in the pulse. However, an appropriate cur-
rent drive profile can be obtained by magnetic flux compression as shown in Fig. 4.
Sr0
lw
IS If2hfast laser beam
Fig. 4 Flux compression geometry showing a possible path for the fast laser beam
All of the objects in figure have cylindrical symmetry except for the fast laser which
comes in a only one azimuthal angle. A seed field is generated by the current, IS, from a
feed inside the initial radius of the wire array, ro. This azimuthal field is then compressed
by the wire array implosion driven by the current I, which returns along rr A laser path
could be provided along the midplane or possibly along the axis (not shown). The disad-
vantage of having the laser come in along the axis is that there will be mixing of the slide
cone material with the DT along the slip surface. Therefore the laser or the hot electrons
that it produces would have to penetrate through this layer to reach uncontaminated DT. If10
i
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Asay, J.R.; Hall, C.A.; Holland, K.G.; Slutz, S.A.; Spielman, R.B. & Stygar, W.A. Z-Pinch Driven Isentropic Compression for Inertial Fusion, report, February 1, 1999; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc681033/m1/16/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.