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Title: Space-time resolved measurements of spontaneous magnetic fields in laser-produced plasma

The first space-time resolved spontaneous magnetic field (SMF) measurements realized on Prague Asterix Laser System are presented. The SMF was generated as a result of single laser beam (1.315 μm) interaction with massive planar targets made of materials with various atomic numbers (plastic and Cu). Measured SMF confirmed azimuthal geometry and their maximum amplitude reached the value of 10 MG at the laser energy of 250 J for both target materials. It was demonstrated that spatial distributions of these fields are associated with the character of the ablative plasma expansion which clearly depends on the target material. To measure the SMF, the Faraday effect was employed causing rotation of the vector of polarization of the linearly polarized diagnostic beam. The rotation angle was determined together with the phase shift using a novel design of a two-channel polaro-interferometer. To obtain sufficiently high temporal resolution, the polaro-interferometer was irradiated by Ti:Sa laser pulse with the wavelength of 808 nm and the pulse duration of 40 fs. The results of measurements were compared with theoretical analysis.
Authors:
; ; ;  [1] ;  [2] ;  [3] ; ; ; ; ; ; ; ; ;  [4] ;  [5] ;  [2] ;  [6] ;  [7] ;  [5] more »; ;  [8] ;  [9] « less
  1. Institute of Plasma Physics and Laser Microfusion, Warsaw (Poland)
  2. P.N. Lebedev Physical Institute of RAS, Moscow (Russian Federation)
  3. (Moscow Eng. Phys. Institute) (Russian Federation)
  4. Institute of Plasma Physics ASCR, Prague (Czech Republic)
  5. (Czech Republic)
  6. National Research Nuclear University (Moscow Eng. Phys. Institute) (Russian Federation)
  7. Czech Technical University in Prague, FNSPE, Prague (Czech Republic)
  8. Institute of Physics ASCR, Prague (Czech Republic)
  9. Warsaw University of Technology, ICS, Warsaw (Poland)
Publication Date:
OSTI Identifier:
22486443
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 10; 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; AMPLITUDES; COMPARATIVE EVALUATIONS; COPPER; FARADAY EFFECT; INTERFEROMETERS; LASER-PRODUCED PLASMA; MAGNETIC FIELDS; PHASE SHIFT; PHOTON BEAMS; PLASMA EXPANSION; PLASTICS; POLARIZATION; ROTATING PLASMA; SPATIAL DISTRIBUTION; SPATIAL RESOLUTION; TIME RESOLUTION; WAVELENGTHS