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Effect of soft metal gasket contacts on contact resistance, energy deposition, and plasma expansion profile in a wire array Z pinch
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10.1063/1.2991110
/content/aip/journal/rsi/79/9/10.1063/1.2991110
http://aip.metastore.ingenta.com/content/aip/journal/rsi/79/9/10.1063/1.2991110
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Drawing of the wire holder used for these experiments. is the normal force holding the wire against the electrode as defined in Eq. (2). The angle (theta) is for the anode and for the cathode.

Image of FIG. 2.
FIG. 2.

Sketch of the clamping technique used to compress the wire to the electrode (Z-pinch wire diameter exaggerated for clarity).

Image of FIG. 3.
FIG. 3.

Diagnostic traces from MZP4 shot 328. At there is a kink in the current trace that corresponds to the first sharp spike in the diode signal. This may indicate the time at which wire breakdown occurs.

Image of FIG. 4.
FIG. 4.

Contact resistance measured by a 100 kHz resistance bridge. The thin dashed line represents a power function fit to the weighted data points. The thin dotted lines represent the indium gasket case sigma. The thick dotted lines represent the silver gasket case sigma.

Image of FIG. 5.
FIG. 5.

Open pinhole images from shots 313 (left, indium gasket) and 316 (right, weighted). The intensity of light emission and the emitting volume in the indium case is greater.

Image of FIG. 6.
FIG. 6.

Dark-field laser Schlieren image from shot 329 (left wire used indium gaskets, right wire strung in typical weighted contact method with 0.89 g wire weights). Left wire is relatively uniform down the length of the wire. Right wire is poorly expanded near the anode.

Image of FIG. 7.
FIG. 7.

Sketch of the definitions used to analyze the laser Schlieren images. Fractional trunk height is defined as , and fractional trunk diameter is .

Image of FIG. 8.
FIG. 8.

Plot of the fractional trunk height for the series of shots. The black bold line represents the average of the indium points, and the bold dotted lines represent sigma. The gray thin line represents the average of the 0.89 g weighted points (control), and the thin dotted lines represent sigma.

Image of FIG. 9.
FIG. 9.

Plot of the fractional trunk diameter for the series of shots. The black bold line represents the average of the indium points, and the bold dotted lines represent sigma. The gray thin line represents the average of the 0.89 g weighted points (control), and the thin dotted lines represent sigma.

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/content/aip/journal/rsi/79/9/10.1063/1.2991110
2008-09-30
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of soft metal gasket contacts on contact resistance, energy deposition, and plasma expansion profile in a wire array Z pinch
http://aip.metastore.ingenta.com/content/aip/journal/rsi/79/9/10.1063/1.2991110
10.1063/1.2991110
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