[其它]90 MODELING OF THE INVERSE Z-PINCH DYNAMICS *

MODELING OF THE INVERSE Z-PINCH DYNAMICS * ']>/$[!  
V. Makhina, A. Esaulov, B.S. Bauer, R.E. Siemon, R. Presura, Y:5Gp8Vi  
V.I. Sotnikov, and I. Paraschiv X0]5I0YP  
University of Nevada, Reno, Mail Stop 220 n'<F'1SWv  
Reno, Nevada 89557, U.S.A. )s8{|)-  
I.R. Lindemuth, R.C. Kirkpatrick, and P.T. Sheehey k{+Gv}Y  
Los Alamos National Laboratory, Mail Stop B259 ]nx5E_j2  
Los Alamos, New Mexico 87545, U.S.A. ~"U^N:I"  
D.D. Ryutov {9h`h08?z  
Lawrence Livermore National Laboratory, Mail Stop L-630 /h K/
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Livermore, California 94550 , U.S.A. 24d{ol)  
Abstract ;-{'d8  
The two-dimensional MHD numerical simulation >m`<AynJ  
MHRDR has been applied to develop and investigate a D~f[Rg  
new possible fusion scheme, and design experiments to m)xz_Plc  
test it. The confinement of magnetized high-beta plasma udX!R^8jE  
directly by material walls holds considerable promise for P<R'S  
fusion. An interesting prospective Magnetized Target [gE2;J0*  
Fusion (MTF) target plasma is the cylindrical inverse  k< g  
pinch, which is, in theory, an MHD-stable, self-organized C,dRdEB>  
plasma. An inverse pinch consists of coaxial, metal, 0d #jiG  
current-carrying cylinders with plasma between them. M{`uI8vD  
Important insight into this plasma has been obtained using 7j
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the MHRDR simulation. First, simulations observe that  LhtA]z,m  
interchange m=0 modes rearrange the plasma into a fzjZiBK@  
pressure profile that is stable to m=0 (the Kadomtsevstable kwpbgQ  
profile). Such plasma self-organization is very Jnq}SUev  
encouraging for the development of a robust practical :.F;LF&  
device, since the pressure profile does not have to be W0N*c*k  
created in a very particular manner to satisfy the 95BRZ!ts  
Kadomtsev criterion. Second, the plasma beta can be JO|xX<#:  
adjusted by using an initial bias current on the central h Ap(1h#m  
conductor to magnetize the gas before it is ionized. In oJor ]QYK  
this way, the plasma beta can be kept below 40%, so that, wO*x0$  
according to theory, the troublesome m=1 mode is also  u~j&g  
stabilized. (The r-z MHRDR code does not analyze the Vg8c}
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three-dimensional kink motion.) Although the convection ,V #r  
associated with self-organization enhances thermal ey) 8q.5  
transport, the kinetic energy of turbulent motion is small <FU1|  
compared to the thermal energy, and the energy transport "I&,':O+  
is globally Bohm-like, which is acceptable for MTF. The Y-:dPc{  
MHRDR modeling is guiding the design of an experiment iVf8M$!m  
on the 2-TW Zebra z-pinch at UNR to test the inversepinch Z oQPvs7_  
concept. For the parameters of the designed

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experiment, MHRDR simulations predict the 2-MV, {s~t>Rp+  
1-MA Marx generator will produce a deuterium plasma ;Qdw$NuW  
with B ~ 4 T, n ~ 1022 m-3, T ~ 300 eV, and a lifetime of 0D^c4[Y'l  
10-50 microseconds. Understanding of the energy !wEz= i  
transport in this simple wall-confined plasma will , Y cF~  
bxF'`^En  
14th IEEE International Power Conference全文数据，part 01 - part 16 FKkL%:?  
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http://www.rayfile.com/files/3e819f21-a63c-11dd-9b7f-0014221b798a/ `>skcvkm  
[url=http://www.rayfile.com/files/a46912f0-a63c-11dd-994a-0019d11a795f/]http://www .. B-EDVMu  
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