Diagnosis of Plasma States in X-Ray Laser Experiments
Abstract
At an LF-12 laser installation, an Nd glass laser of approximately 1. 5 ns pulse width with 500 to 600 J was focussed into a line 120 micrometers wide and 20 mm long and then onto a 1.5 mm thick germanium plane target. A plane crystal spectrograph (wavelength measurement range was between 0.6 and 0.9 nm) with a spatial resolving power was placed in the target chamber to diagnose the germanium plasma state. The corresponding intensity ratio between the quasi-Ne ion spectral lines with 2p-nd (n greater than or equal to 4) energy level transition was used to estimate the plasma electron temperature at 400 to 600 EV. In the laboratory, the measured line spectrum was mainly generated by quasi- Ne Ge XXIII ions; next were the spectral lines generated by quasi-F Ge XXIV ions; the spectral lines generated by quasi-Na Ge XXII ions were relatively weak. In addition, the axial-direction distribution uniformity of linear plasma, and the lateral-direction distribution characteristics of ions were provisionally observed. X-ray laser and plasma parameters.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1992
- Accession Number
- ADA256909
Entities
People
- Cai Yuqin
- Chunyu Shutai
- Yang Shangjin
Organizations
- National Air and Space Intelligence Center