Abstract
X pinches formed from tungsten, molybdenum, titanium, aluminum, and alloys, such as constantan and nichrome with diameters of 13–25μm, have been imploded with a 300kA, 1μs quarter-period capacitor discharge and observed with an array of diagnostics including time-integrated optical photography, x-ray pinhole cameras, x-ray Si photodiodes, a flat crystal spectrograph, and a Nd:YAG laser interferometry/schlieren system. The results of these comprehensive observations are presented. When a single, central hot spot is formed with the right choice of wire and x-ray filter, it is observed to be highly localized, very bright and small enough that point projection radiography can be routinely demonstrated for a simple biological specimen. For an aluminum X pinch, spectroscopic measurements indicate that the hot spots have a plasma density and electron temperature consistent with ∼1020cm−3 and ∼320–350eV, respectively.
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