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Return To: Session IFP - Inertial Fusion Energy (Thursday, 22
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M. G. Haines , R. Aliaga-Rossel , F. N. Beg ,
A. Bell , S. Channon , J. P. Chittenden , M. Coppins ,
A. E. Dangor , D. F. Howell , N. G. Kassapakis ,
S. V. Lebedev , I. H. Mitchell , J. Ruiz-Camacho ,
J. F. Worley and D. Zdravkovic
The Blackett Laboratory, Imperial College, London SW7 2BZ, U. K.
I. Ross
A.W.E. Aldermaston, Reading, RG7 4PR, U. K.
Abstract
Z-pinch experiments using cryogenic deuterium fibre loads have been
carried out on the MAGPIE generator at currents up to 1.4MA. M=0 instabilities
in the corona caused plasma expansion and disruption before the plasma could
enter the collionless Large ion Larmor radius regime. For the last 12 months
we have studied Aluminium wire array implosions using laser probing, optical
streaks and gated X-ray images. Plasma from the wires in accelerated to the
axis as radial plasma streams with uncorrelated m=0 instabilities
superimposed. Later in the discharge a global Rayleigh-Taylor (R-T)
instability develops. Single and double aluminium and tungsten wire shots were
conducted at 150kA. 2-D and 3-D simulations and a heuristic model of wire
arrays will be presented along with theories on the combined MHD/R-T
instability and sheared axial flow generation by large ion Larmor radius
effects.
IAEA 1999