TAP curved crystal spectrometer for diagnosing K-shell radiation of aluminum Z-pinch plasma

A temporally-and spatially-resolved X-ray spectrometer, with spectral range of 1500-2300 eV and temporal resolution about 2 ns, has been developed for diagnosing K-shell radiation of aluminum wire array Z-pinch plasma driven by Qiangguang-I generator (1.5 MA, 80-100 ns). It consisted of an elliptically-curved TAP crystal and a four-channel X-ray frame camera. Theoretical analyses were made to check out possible effects of different signal transfer and conversion processes on spectral response of the spectrometer. It recorded time-resolved and-integrated K-shell resonance lines of H-, He-like aluminum ions and satellite lines of Li-, He-like ions. Results were compared with spectral-resolved X-ray images obtained by pinhole cameras. Time-resolved K-shell spectra show many differences on line ratios and axial distribution with each other and time-integrated results, which exhibits variations of electron temperature and ion population on a 5-10 ns time scale.