Diagnosis of X-ray spectrum of Z-pinch plasma with mica curved crystal spectrometer

For the research of X-ray spectrum of Z-pinch plasma, a wide variety of X-ray and extreme ultraviolet diagnostics are being developed to study on Yang accelerator. An elliptical curved crystal spectrometer was designed and the spectrograph has 1350 mm focal length and for these measurements, a mica crystal bent onto an elliptical substrate was utilized with an eccentricity e=0.9485. The crystal analyzer covers the Bragg angel ranging from 30° to 60°. The ability of the mica crystal to efficiently reflect radiation in multiple orders allowed us to cover the entire spectral range from 0.10 to 1.73 nm except for a gap from 0.86 to 1.00 nm. The experiment was carried out on Yang accelerator and aimed to investigate the characteristics of a high density plasma. Experimental results using curved mica crystal analyzer are described and show spectrum of argon-puff Z-pinch plasma. Spectra showing the H-like resonance line Lyαwith satellite, He-like resonance line w, the magnetic quadrupole M2line, the intercombination line y, the forbidden line z and a cold Kαline of argon were recorded with X-ray film. The calculated wavelength resolution is about 564. It suggests that the curved crystal spectrometer is suitable for plasma diagnostic.