Experimental study of Z-pinch radiation spectra at the Angara-5-1 facility

Abstract

Abstract. The results of measuring the energy, power and spectrum of the soft X-ray radiation (SXR) pulse at the Angara-5-1 facility in the photon energy range of 0.02 -2 kV are presented. A comparison of the SXR emitted in axial and radial directions is presented. This paper presents the results of measuring the energy, power and spectrum of the soft X-ray radiation (SXR) pulse in the photon energy range of 0.02 -2 kV, observed in the powerful Z-pinch in axial and radial directions. The data was obtained by analyzing the implosions of cylinders (1.2 cm in diameter and 1.6 cm high) composed of 6 μm-diameter tungsten wires with linear mass of 220 μg/cm at the Angara-5-1 facility in the range of the discharge current of 2.2 -3 MA.Two sets of vacuum X-ray diode (VXRD) sensors were used to measure temporal profile of the SXR radiation power as well as to reconstruct spectral features of powerful Z-pinch radiation in axial and radial direction. The radial set consisted of 4 VXRDs placed behind various filters while the axial one consisted of 3 VXRDs behind the same filters. Spectral range of each VXRD sensor was determined by quantum efficiency curve of the photocathode used and by spectral dependence of transmission factor of the set of filters made from different materials [1].The spectral characteristics of the SXR radiation source during implosion of the Z-pinch based on the tungsten (wolfram) cylindrical wire liners (W-CWL) also was studied using the diffraction grazing incidence spectrometer (DGIS) with the off-Rowland circle registration scheme of spectrum registration. Figure 1 shows the optical scheme of the DGIS:1 To whom any correspondence should be addressed.