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"Relativistic
magneto-active laser plasmas" V.S. Belyaev, A.P. Matafonov
(CRIMB, Korolev, Russian Federation) Abstract: Results of experimental
investigations: ћ Laser facility
'Neodymium'. Its
power is of 10 TW, the radiation intensity is up to 3´1018 W/cm2,
the pulse duration is 1.5 ps, the wavelength is 1.055 mm. The facility is provided with a complex
for measurements and control of parameters of laser radiation and diagnostic
of atomic and nuclear processes in laser plasmas (parameters of x-ray, g-radiation, yields of neutrons and
charged particles). ћ Generation of
super-strong magnetic fields. We suggested and
checked experimentally the direct spectral method for measurements of values
of super-strong magnetic fields generated in laser plasmas. This method is
based on the observation of resonance interaction between the Landau levels
in magnetic field and energy levels of plasma ions. The value of the magnetic field is of about
40 MG at the laser intensity of 2´1017 W/cm2 and of about
60 MG at the laser intensity of 3´1017 W/cm2. The
approach for control of generation of super-strong magnetic fields in laser
plasmas has been checked using the method of interferometry of chirped laser
pulses. ћ The effective temperature and the directed motion of fast atomic
ions in laser picosecond plasmas. Results are
based on the measurements of the Doppler spectra of fluorine hydrogenlike
ions (the target is the plates from fluoride plastics with the thickness of
200 mm). The important peculiarity of
the energy distribution of fast ions is their slow decreasing up to the
energy of 1.4 MeV at the laser intensity of 2´1018 W/cm2; the
effective temperature of fast ions is of the order of 350 keV. The directed
motion of fast ions inside the target has been observed using red shift of the
Doppler profile of the Lya line. ћ Generation of MeV-energy g-quanta. The photo-nuclear reactions |
