Detection of the Z-dependence of laser-plasma corona temperature in a study of half-integer harmonic radiation
Abstract
Simultaneous spectral-time and polarization measurements were made of laser-plasma radiation at frequencies of omega sub 0/2 and 3/2omega sub 0 during the irradiation of targets with different atomic numbers Z by second-harmonic radiation from a neodymium laser at a wavelength of 0.53 micron. Experimental results regarding the generation of half-integer harmonics are interpreted on the basis of theoretical concepts concerning physical processes occurring in the region of a quarter of the critical density. An analysis of harmonic spectra indicates that the electron temperature increases as the atomic number of the target material increases. This agrees with predictions of the theory of anomalous transport caused by the development of ion-acoustic turbulence.
- Publication:
-
Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki
- Pub Date:
- March 1983
- Bibcode:
- 1983ZhETF..84..936B
- Keywords:
-
- Harmonic Radiation;
- Laser Plasmas;
- Neodymium Lasers;
- Plasma Temperature;
- Electron Energy;
- Plasma Density;
- Plasma Frequencies;
- Plasma Physics;
- Polarized Radiation;
- Spectral Energy Distribution;
- Temporal Distribution;
- Plasma Physics