Abstract
University-scale Z-pinch generators are able to produce High Energy Density (HED) plasmas in a broad range of plasma parameters under well-controlled and monitored experimental conditions suitable for radiation studies. The implosion of X-pinch and wire array loads at a 1 MA generator yields short (1-20 nsec) x-ray bursts from one or several bright plasma spots near the wire cross point (for X-pinches) or along and near Z-pinch axis (for wire arrays). Such X- and Z-pinch HED plasma with scales from a few µm to several mm in size emits radiation in a broad range of energies from 10 eV to 0.5 MeV and is subject of our studies during the last ten years. In particular, the substantial number of experiments with very different wire loads was performed on the 1 MA Zebra generator and analyzed: X-pinch, cylindrical, nested, and various types of the novel load, Planar Wire Arrays (PWA). Also, the experiments at an enhanced current of 1.5-1.7 MA on Zebra using Load Current Multiplier (LCM) were performed. This paper highlights radiative signatures of X-pinches and Single and Double PWAs which are illustrated using the new results with combined wire loads from two different materials.
Highlights
University-scale Z-pinch generators are able to produce High Energy Density (HED) plasmas in a broad range of temperatures, electron and ion densities, opacities depending on the type of load configuration and wire materials
This paper focuses on radiative signatures of X-pinches and Planar Wire Arrays which are illustrated using the new results with combined wire loads from two different materials that will be defined and discussed below
Radiative signatures of X-pinches and Z-pinches from Planar Wire Arrays produced on the 1-1.6 MA Zebra at UNR have been illustrated using the new results with combined wire loads from two different materials
Summary
University-scale Z-pinch generators are able to produce High Energy Density (HED) plasmas in a broad range of temperatures, electron and ion densities, opacities depending on the type of load configuration and wire materials. The experiments with X-pinch, cylindrical, nested, and various types of the novel load, Planar Wire Array (PWA) were performed on Zebra generator.[1,2,3,4,5,6,7,8,9,10,11,12] The Zebra generator is a 100 ns rise time, 1 MA current, 1.92 Ω pulsed power generator located at UNR. This is an Open Access article published by World Scientific Publishing Company. Measurements of the x-ray radiation with sub-nanosecond time resolution were performed with absolutely calibrated x-ray diodes (XRD) and photoconducting detectors (PCD) in the same assembly as the Ni bolometer. This paper focuses on radiative signatures of X-pinches and Planar Wire Arrays which are illustrated using the new results with combined wire loads from two different materials that will be defined and discussed below
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