X-ray spectroscopic investigation of the spatial distribution of the parameters of a laser plasma heated by 10/sup -10/ sec pulses
A laser plasma was generated by pulses of approx.5 x 10/sup 15/ W/cm/sup 2/ intensity and tauapprox.10/sup -10/ sec duration. The x-ray emission spectra of this plasma were recorded in the spectral range 3--18 A. The apparatus employed made it possible to record the spectrum produced by a single laser flash and its resolving power was high (lambda/..delta..lambdaapprox.5000). The relative intensities of the lines due to helium-like and hydrogen-like ions were used in the determination of the electron temperature T/sub e/ and electron density N/sub e/ in the plasma. The spatial distribution of the x-ray emission of a magnesium plasma was determined with a resolution of 25 ..mu... The laser radiation was focused on a plane target and in a recess. In both cases the values of T/sub e/, N/sub e/, and of the Stark and Doppler broadenings of several lines (T/sub e/ was found from the relative intensities of the lines and N/sub e/ from the relative intensities and Stark broadening) were determined as a function of the distance to the target. (AIP)
- Research Organization:
- P. N. Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow
- OSTI ID:
- 7320794
- Journal Information:
- Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 3:10; ISSN SJQEA
- Country of Publication:
- United States
- Language:
- English
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