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Title: Photoionized plasmas induced in neon with extreme ultraviolet and soft X-ray pulses produced using low and high energy laser systems

A comparative study of photoionized plasmas created by two soft X-ray and extreme ultraviolet (SXR/EUV) laser plasma sources with different parameters is presented. The two sources are based on double-stream Xe/He gas-puff targets irradiated with high (500 J/0.3 ns) and low energy (10 J/1 ns) laser pulses. In both cases, the SXR/EUV beam irradiated the gas stream, injected into a vacuum chamber synchronously with the radiation pulse. Irradiation of gases resulted in formation of photoionized plasmas emitting radiation in the SXR/EUV range. The measured Ne plasma radiation spectra are dominated by emission lines corresponding to radiative transitions in singly charged ions. A significant difference concerns origin of the lines: K-shell or L-shell emissions occur in case of the high and low energy irradiating system, respectively. In high energy system, the electron density measurements were also performed by laser interferometry, employing a femtosecond laser system. A maximum electron density for Ne plasma reached the value of 2·10{sup 18 }cm{sup −3}. For the low energy system, a detection limit was too high for the interferometric measurements, thus only an upper estimation for electron density could be made.
Authors:
; ; ; ;  [1] ; ; ;  [2] ; ; ; ; ; ; ;  [3]
  1. Institute of Optoelectronics, Military University of Technology, Kaliskiego 2, 00-908 Warsaw (Poland)
  2. Institute of Plasma Physics and Laser Microfusion, 23 Hery St., 00-908 Warsaw (Poland)
  3. Institute of Plasma Physics ASCR, Prague, Czech Republic and Institute of Physics ASCR, Prague (Czech Republic)
Publication Date:
OSTI Identifier:
22408360
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON DENSITY; EXTREME ULTRAVIOLET RADIATION; HELIUM; INTERFEROMETRY; IONS; K SHELL; L SHELL; LASER-PRODUCED PLASMA; NEON; PHOTOIONIZATION; PHOTON BEAMS; PULSED IRRADIATION; SENSITIVITY; SOFT X RADIATION; SPECTRA; XENON; X-RAY LASERS