Z-pinch plasma spectral imaging with uniform dispersion crystal

Based on the self-focusing and uniform dispersion principle, a spectrograph with uniform dispersion bent crystal was developed for Z-pinch plasma X-ray diagnosis. -quartz (1010) crystal was used as dispersion element and the Bragg angle of the crystal analyzer ranged from 43.4 to 72.7. The X-ray film was employed to receive the spectra with an effective area of 10 mm50 mm. The experiment was carried out at the Yang accelerator in China Academy of Engineering Physics. The H-like and He-like spectra of aluminum Z-pinch plasma were obtained. The distribution of aluminum spectra satisfies the uniform dispersion condition. The linear dispersion of the developed spectrograph is -116.198 mm/nm and the error is only 3.168% relative to the theoretical value of -120 mm/nm. The experimental results demonstrate that the uniform dispersion bent crystal spectrograph is suitable for Z-pinch plasma X-ray spectroscopy diagnosis.