Abstract
In order to accurately diagnose the electron density of laser-produced plasma,the method of relative intensity ratio of helium-like resonance to combination lines was proposed based on the polarization spectrum.It took into account polarization characteristics of the X-ray in laser-produced plasma,modified the real intensity ratios of the resonance to intercombination lines of He-like ions,then derivated the density of plasma.The experiment was carried out at the 2×10 J laser facility at Laser Fusion Research Center of,China Academy of Engineering Physics(CAEP).X-ray spectra emitted from the aluminum plasmas were recorded by polarized PET(002) crystal spectrometer.By correcting two Al helium-like spectra,it was calculated that the electron density was about 1.5×1 020 cm-3.The experimental results showed that the arithmetic was adapted to diagnose laser-produced high temperature high-density plasmas.
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