Very sobering gigaWatt electron beam research,
posted at American Physical Society, online (http://www.aps.org)
From a scarier* page of presentation abstracts on this research :
http://flux.aps.org/meetings/YR98/BAPSDPP98/abs/S4900.html#SK6S.048
[K6S.05]
94-GHz Harmonic Gyrotrons
R.C. Stutzman, D.B. McDermott, N.C. Luhmann Jr. (UC Davis), T.A.
Spencer (Phillips Lab.)
25-100 kW, 94 GHz, s=2-8 harmonic gyrotrons utilizing both MIG and
Cusp
electron guns are
being developed at a new facility at UCD. The initial experiment will
test
a 25 kW, second-harmonic TE_02 gyrotron using a 25 kV, 4 A,
v_t/v_z=1.5, MIG
electron beam with a predicted device efficiency of 25%. Although a
high-T_c superconducting magnet has been designed for this device, the
tests
will employ a conventional superconducting solenoid. Designs will also
be
presented for a 4th-harmonic, 35 kW, 14% efficient, smooth-bore TE_41
gyrotron; a 4th-harmonic, 75 kW, 30% efficient, slotted gyrotron; and
an
8th-harmonic, 22 kW, 9% efficient, permanent magnet, slotted gyrotron
that
will all use a 70 kV, 3.5 A, v_t/v_z=2, axis-encircling electron
beam from a
Cusp gun on order from Northrop Grumman.
*And by "scary" I mean in regard to war machines, and the capability
our gene pool continually engenders which strives to specifically
destroy cultural instabilities within our own gene pool.
I suppose the "scary" part is the male-dominant war-mode culture of
today's high-stress world of complex problems is by nature empowered to
maintain the power over others with technology.
So long as we continually view cultures not of our own as problems
rather than solutions, we will continually never find an off-ramp from
our mass-migration to the cliff edge with all our fellow lemmings.
-DonEMitchell
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