Abstract
The prebreakdown stage of the evolution of a VUV-soft X-ray emitting
capillary discharge initiated by a high-voltage pulse is studied. The
capillary is surrounded by a shield having the cathode potential. For
low initial gas pressure most of the electrons are in the runaway
regime. This is taken into account in the formulation of the theoretical
approach by retaining the inertial terms in the momentum equation for
the electrons. In addition, the ionization rate is calculated by
considering the cross section for ionization by high-energy electrons.
The two-dimensional system of the basic equations is reduced to a
one-dimensional system of equations for the axial distribution of the
relevant physical quantities by introducing appropriate radial profiles
of the electric potential and the electron velocity, and satisfying the
boundary conditions at the capillary wall. The resulting system of
equations admits solutions of the form of stationary ionization waves
transferring the anode potential to the cathode end. The theoretical
results are correlated with the time-resolved experimental studies of
the voltage collapse associated with the hollow-cathode-assisted
ionization growth in the capillary.
| Original language | English GB |
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| Title of host publication | American Physical Society, Division of Plasma Physics Meeting, November 16-20, 1998 New |
| State | Published - 1 Nov 1998 |
| Externally published | Yes |
| Event | American Physical Society, Division of Plasma Physics Meeting, - New Orleans, LA, United States Duration: 16 Nov 1998 → 20 Nov 1998 |
Conference
| Conference | American Physical Society, Division of Plasma Physics Meeting, |
|---|---|
| Country/Territory | United States |
| City | New Orleans, LA |
| Period | 16/11/98 → 20/11/98 |