Abstract
A high-sensitivity bolometer with a short time response to heating with external radiation has been developed. It is intended for measuring the integral parameters of soft X-ray radiation of liner plasma. The bolometer is adapted to the conditions of explosion experiments with an increased level of electromagnetic pickups at facilities that are based on magnetic-explosion generators with megaampere currents. The bolometer has a metal casing for improving the noise immunity of measurements. A 2-μm-thick nickel foil is used as the material for the resistive element of the working substance of the bolometer. The choice of the material and the geometrical dimensions of the bolometer working elements were analyzed. The ultimate thermal load on the bolometer was determined. A technique for calibrating the working elements using a pulse current was developed. The working capacity, good noise immunity, and a high sensitivity of the bolometer were demonstrated in experiments. The dynamic range in measurements of the surface energy density of X rays is 0.03–0.3 J/cm2.
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Original Russian Text © P.B. Repin, I.M. Markevtsev, S.Yu. Kornilov, 2014, published in Pribory i Tekhnika Eksperimenta, 2014, No. 2, pp. 97–102.
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Repin, P.B., Markevtsev, I.M. & Kornilov, S.Y. A fast time-response bolometer for soft X-ray radiation energy measurements in a high-current Z-pinch. Instrum Exp Tech 57, 183–188 (2014). https://doi.org/10.1134/S0020441214020122
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DOI: https://doi.org/10.1134/S0020441214020122