SPECTRAL MEASUREMENTS OF SOFT-X-RAY EMISSION FROM THE LASER-PLASMA OFINDIRECT-DRIVE TARGETS IN THE ISKRA-5 FACILITY

Results of spectral measurements of X-ray emissions from the spherical cavity of an indirect-drive target in the quantum energy range 0.2-3. 0 keV are presented. Measurements are carried out for various target s izes and for various materials of the converter covering the inner sur face of the cavity. Spectra are measured by broad-band spectrometers w ith semiconductor or vacuum X-ray diodes and K-filters and by a narrow -band spectrometer with multilayer X-ray mirrors and crystals. The res ults of measurements are recorded on film. It is shown that the total energy and spectrum of X-ray emission from these targets depend substa ntially on the cavity diameter and the atomic number of the converter material. The experimental data are compared with the calculation resu lts.