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The effect of preionization on the shock wave evolution in a fast cylindrical discharge
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10.1063/1.4811714
/content/aip/journal/jap/113/24/10.1063/1.4811714
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/24/10.1063/1.4811714

Figures

Image of FIG. 1.
FIG. 1.

The general scheme of the experiment, including alumina discharge tube, electromechanical shutter, and pin-hole camera arrangement. The example of the image of the shock wave structure is inserted (44 ns-54 ns from the start of the discharge current, preionization off).

Image of FIG. 2.
FIG. 2.

The time profile of the main discharge current.

Image of FIG. 3.
FIG. 3.

The scheme of the preionization circuit and time profile of the preionization current. The arrow marks the start of the main discharge.

Image of FIG. 4.
FIG. 4.

The radial emission distribution in the discharge tube: (A) preionization off, (B) preionization on. The procedures of the measurement of the shock wave front position X and the front width ΔX are illustrated. The time gates of each frame are shown in the graph. The position of the “dark space” behind the front of the shock wave is marked.

Image of FIG. 5.
FIG. 5.

Time dependencies of the shock wave front positions. (A) Initial pressure of Ar is 80 Pa, (B) initial pressure of Ar is 320 Pa.

Image of FIG. 6.
FIG. 6.

Pressure dependence of the shock wave front velocity.

Image of FIG. 7.
FIG. 7.

Time dependencies of the shock wave front widths. (A) Initial pressure of Ar is 80 Pa, (B) initial pressure of Ar is 320 Pa.

Image of FIG. 8.
FIG. 8.

The VUV spectra of the hot plasma after the moment of cumulation. (A) Preionization on (70 ns–105 ns after the start of the main discharge current), (B) preionization off (120 ns–155 ns).

Tables

Generic image for table
Table I.

The shock wave front velocities.

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/content/aip/journal/jap/113/24/10.1063/1.4811714
2013-06-27
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The effect of preionization on the shock wave evolution in a fast cylindrical discharge
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/24/10.1063/1.4811714
10.1063/1.4811714
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