Anomalous intense driver (AID) concept Page: 4 of 56
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the optimization and control of a very powerful collective wave interaction,
which occurs naturally when a directed stream of electrons passes through a
Although the AID concept is based predominantly on theoretical calcula-
tions, the anomalous transfer of relativistic electron beam energy into both
directed and thermal plasma energy has been observed experimentally. ’ As
the mechanisms are nonclassical, a theoretical analysis of the coupling process
is quite difficult, as the strength of the nonlinear state of the microinsta-
bilities depends upon a large number of factors. Of course, the theoretical
difficulty associated with the anomalous process is just a manifestation of the
great versatility of the interaction, which is fully exploited within the AID
The characteristic nonuniform energy deposition of the collective inter-
action is utilized to concentrate the energy in the plasma. In fact, the
optimized relativistic electron beam-plasma interaction is a power density
multiplication process. Since energy is being transferred from relativistic
beam electrons to nonrelativistic electrons in the plasma, conservation of
energy and momentum require that the interaction both heat and drive a local-
ized axial current in the plasma. The driven axial current, in turn, generates
an azimuthal magnetic field.
If the relativistic beam is solid, the physical configuration is similar
to a nonuniform dense Z pinch in which the azimuthal magnetic field provides
confinement. However, in contrast to a classical Z pinch, the heating and con-
finement are anomalous in character. For an annular relativistic electron beam,
the azimuthal magnetic field leads to a directed heat flow towards the axis of
the device. In this configuration, the kilovolt plasma can be used to drive a
hierarchy of inertial confinement and x-ray devices.
Since the relativistic electron beam-plasma interaction has been studied
extensively, both experimentally and theoretically, for approximately eight
years, it is worthwhile to point out why the concept of an Anomalous Intense
Driver has, to my knowledge, not been suggested previously. Basically, despite
some initial encouraging results, lack of a consistent, definitive connection
between experiment and theory, lack of theoretical techniques to investigate
the interaction, and the programmatic dominance of CTR research combined to
lead researchers away from an AID concept.
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Thode, L.E. Anomalous intense driver (AID) concept, report, March 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1093537/m1/4/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.