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JOURNALS // Optics and Spectroscopy // Archive

Optics and Spectroscopy, 2022 Volume 130, Issue 6, Pages 958–968 (Mi os1778)

Extremely strong fields and ultrashort optical pulses

Diagnostic of ICF target inhomogeneous compression by characteristic X-ray radiography

A. A. Andreevab, D. S. Bespalova, K. Yu. Platonovc, M. V. Sedovd

a Saint Petersburg State University, 199034 St. Petersburg, Russia
b Ioffe Institute, 194021 St. Petersburg, Russia
c Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
d Joint Institute for High Temperatures, Russian Academy of Sciences, 125412 Moscow, Russia

Abstract: A scheme is considered and the parameters of a multipulse X-ray source for obtaining images of the compressed state of a primary laser thermonuclear target are determined. As an example of a source, we consider the characteristic radiation of an iron secondary target with focusing on it of several picosecond laser pulses of subrelativistic intensity. The proposed technique makes it possible to determine the relative large-scale inhomogeneity of the energy release of laser beams that irradiated the thermonuclear target, based on the results of X-ray diffraction of a compressed thermonuclear target, and to estimate the decrease in the neutron yield caused by the asymmetry of the compressed target.

Keywords: picosecond laser plasma, characteristic X-ray radiation, target in laser thermonuclear fusion, iron secondary target, backlighter image.

Received: 03.03.2022
Revised: 03.03.2022
Accepted: 15.03.2022

DOI: 10.21883/OS.2022.06.52640.3350-21



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