Laser-driven relativistic electron beam interaction with solid dielectric
Abstract
The multi-frames shadowgraphy, interferometry and polarimetry diagnostics with sub-ps time resolution were used for an investigation of ionization wave dynamics inside a glass target induced by laser-driven relativistic electron beam. Experiments were done using the 50 TW Leopard laser at the UNR. For a laser flux of ∼2×1018W/cm2 a hemispherical ionization wave propagates at c/3. The maximum of the electron density inside the glass target is ∼2×1019cm-3. Magnetic and electric fields are less than ∼15 kG and ∼1 MV/cm, respectively. The electron temperature has a maximum of ∼0.5 eV. 2D interference phase shift shows the "fountain effect" of electron beam. The very low ionization inside glass target ∼0.1% suggests a fast recombination at the sub-ps time scale. 2D PIC-simulations demonstrate radial spreading of fast electrons by self-consistent electrostatic fields.
- Publication:
-
International Symposium on High Power Laser Ablation 2012
- Pub Date:
- July 2012
- DOI:
- 10.1063/1.4739920
- Bibcode:
- 2012AIPC.1464..679S
- Keywords:
-
- electron density;
- Faraday effect;
- glass;
- interferometry;
- ionisation;
- optical Kerr effect;
- plasma density;
- plasma diagnostics;
- plasma light propagation;
- plasma production by laser;
- plasma simulation;
- plasma temperature;
- plasma-wall interactions;
- polarimetry;
- relativistic electron beams;
- 52.25.Jm;
- 52.38.Dx;
- 52.40.Hf;
- 52.50.Jm;
- 52.65.Rr;
- 52.70.Kz;
- Ionization of plasmas;
- Laser light absorption in plasmas;
- Plasma-material interactions;
- boundary layer effects;
- Plasma production and heating by laser beams;
- Particle-in-cell method;
- Optical measurements