Abstract
We use a first order perturbation expansion of the MHD equations to study the filamentation instability on the plasma-vacuum interface of plasma arcs accelerated by magnetic fields. We model the arc in the same way as Decker, including the effects of finite conductivity σ, but consider perturbations with wave vector k parallel to the magnetic field B. A fourth order mode equation is derived and solved numerically. We find complicated unstable modes, but largely in a region of very small k, beyond the limit of interest in railguns. This instability is therefore much less disrupting than the interchange instability in the parameter ranges we have explored.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 257-260 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 27 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 1991 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy (miscellaneous)
Cite this
Finite conductivity and the interface filamentation instability in railgun arcs. / Huerta, M. A.; Bourouis, M.
In: IEEE Transactions on Magnetics, Vol. 27, No. 1, 01.01.1991, p. 257-260.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Finite conductivity and the interface filamentation instability in railgun arcs
AU - Huerta, M. A.
AU - Bourouis, M.
PY - 1991/1/1
Y1 - 1991/1/1
N2 - We use a first order perturbation expansion of the MHD equations to study the filamentation instability on the plasma-vacuum interface of plasma arcs accelerated by magnetic fields. We model the arc in the same way as Decker, including the effects of finite conductivity σ, but consider perturbations with wave vector k parallel to the magnetic field B. A fourth order mode equation is derived and solved numerically. We find complicated unstable modes, but largely in a region of very small k, beyond the limit of interest in railguns. This instability is therefore much less disrupting than the interchange instability in the parameter ranges we have explored.
AB - We use a first order perturbation expansion of the MHD equations to study the filamentation instability on the plasma-vacuum interface of plasma arcs accelerated by magnetic fields. We model the arc in the same way as Decker, including the effects of finite conductivity σ, but consider perturbations with wave vector k parallel to the magnetic field B. A fourth order mode equation is derived and solved numerically. We find complicated unstable modes, but largely in a region of very small k, beyond the limit of interest in railguns. This instability is therefore much less disrupting than the interchange instability in the parameter ranges we have explored.
UR - http://www.scopus.com/inward/record.url?scp=0025796527&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025796527&partnerID=8YFLogxK
U2 - 10.1109/20.101036
DO - 10.1109/20.101036
M3 - Article
AN - SCOPUS:0025796527
VL - 27
SP - 257
EP - 260
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 1
ER -