[其它]91 LINEAR ANALYSIS AND 3D HYBRID SIMULATION STUDY OF Z-PINCH INSTABILITIES IN THE PRESENCE

LINEAR ANALYSIS AND 3D HYBRID SIMULATION STUDY OF Z-PINCH INSTABILITIES IN THE PRESENCE OF NON - IDEAL MHD EFFECTS* \y*
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V. I. Sotnikov, L. Wanex, B. S. Bauer, I. Paraschiv .w'vD/q;  
UNR, Reno, NV 89557 USA jKt-~:  
J. N. Leboeuf ,RK3eQ  
UCLA, Los Angleles, CA 90095 USA g3rRhS  
P. Hellinger, P. Travnicek and V. Fiala _^;;i4VZ  
UFA, Prague 4, Czech Republic QFzFL-H~N  
Abstract :GL7J6  
The development of z-pinch instabilities in the N#Ag'i4HF  
presence of the Hall term, finite Larmor radius effects k/#M<z  
(FLR), and axial magnetic field is being investigated. >~&(P_<b  
The linear stage of instability development is studied with fNxw&ke8&  
linearized magnetohydrodynamic (MHD) equations jfSg){  
based on the Hall fluid model. Results for linear growth Kfjryo9  
rates as a function of axial sheared flow, axial magnetic Qq0O0U  
field, and the Hall term,with an emphasis on the sausage nYov>x]  
and kink instabilities, are reported. V<-htV  
We also present simulations performed with the 3D P3$,ca'  
version of the hybrid code based on the CAM-CL lwsbm D  
algorithm [1]. These simulations serve the dual purpose IxP^i{/1?  
of comparing with the linear Hall MHD analysis and of wW()Zy0)  
investigating the nonlinear stage of instability A7'bNd6f9  
development with a kinetic model. The overall aim is to *]!l%Uf
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characterize the combined influence of sheared axial "]<}Hy  
flow, the Hall term, axial magnetic field, and finite ~PYFYjHC  
Larmor radius (FLR) effects on the development of 1l]C5P}E  
sausage and kink modes. 
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Calculations have been carried out in several regimes STlPT5e.}  
with respect to the Hall parameter ε = c/ωpir0 (c is the nO_!:6o".  
speed of light, ωpi is the ion plasma frequency and r0 is @^wpAQfd4  
the plasma radius), with and without axial magnetic field. F!R2_89iy  
The axial magnetic field used in the calculations has been oWD)+5.]  
varied from B0z = 0 to B0z = 0.5, where the amplitude of 0ny{)Sd6um  
the axial magnetic field is measured relative to the 1 ;Ju
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azimuthal magnetic field created by the axial current in *:#Z+7x ]  
the z-pinch. ?>)yKa#U  
We have also initiated 3D hybrid simulations to study {5 Kz'FT  
the time development of density and magnetic field #NJ<[Gew  
profiles produced in the process of long pulse Z-pinch Doj(.wm~  
implosions in Saturn [2]. The 3D hybrid code allows for Y`]rj-8f0B  
multiple ion species with multiple charges. This code also ]^!}*  
contains term with finite resistivity in the magnetic field 3uO8v{`  
equation. We can thus model realistic wire array loads WY.
5K =}  
with wires composed of different materials, for example  QT_^M1%  
Al (95%) and Mg (5%), like in Saturn. a>(~C
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14th IEEE International Power Conference全文数据，part 01 - part 16 86{ZFtv  
http://www.rayfile.com/files/089ddb14-a63a-11dd-975a-0014221b798a/ /hfUPO5  
http://www.rayfile.com/files/4a3ec10a-a63a-11dd-9338-0014221b798a/ sy.:T]ZH  
http://www.rayfile.com/files/7a61ac11-a63a-11dd-8de6-0014221b798a/ \P@S"QO  
http://www.rayfile.com/files/abc55d59-a63a-11dd-9c7d-0014221b798a/ -$ali[  
http://www.rayfile.com/files/dc377bcf-a63a-11dd-acc9-0014221b798a/ YE
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http://www.rayfile.com/files/0d04b3d4-a63b-11dd-b4e8-0014221b798a/ j]4,6`b\  
http://www.rayfile.com/files/3e501c26-a63b-11dd-8167-0014221b798a/ kd`YSkZ  
http://www.rayfile.com/files/7056586e-a63b-11dd-9dbe-0014221b798a/ !OQuEJR  
http://www.rayfile.com/files/a50ff68c-a63b-11dd-a055-0014221b798a/ vrO
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http://www.rayfile.com/files/dabae685-a63b-11dd-83bf-0014221b798a/ \P?--AIq<  
http://www.rayfile.com/files/0ee56f80-a63c-11dd-9d0b-0014221b798a/ qzlER  
http://www.rayfile.com/files/3e819f21-a63c-11dd-9b7f-0014221b798a/ >Qk97we'9  
[url=http://www.rayfile.com/files/a46912f0-a63c-11dd-994a-0019d11a795f/]http://www.rayfile.com/files/a46 .. '8={ sMy  
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