During the academic semesters the plasma physics department hosts seminars on Tuesday at 2:30 pm.
If you have questions or want to suggest a speaker/topic, please contact Prof. Olga Rosmej or Dr. Paul Neumayer.

Plasmaphysik Seminar

Generation of transient strong shocks by fs- lasers

by Katarzyna Batani (Institute of Plasma Physics and Laser Microfusion, Warsaw)

Europe/Berlin
Online

Online

Zoom-Meeting https://gsi-fair.zoom.us/j/96629963798 Meeting-ID: 966 2996 3798 Kenncode: 130302
Description

The investigation of the generation of very strong shocks (initial pressures larger than 100 Mbar) [1,2] in solid density matter is important for developing a platform for diagnosing matter in extreme pressure conditions which are relevant for shock ignition conditions [3,4]. Here we report an experimental campaign, performed at the CLPU VEGA – II laser facility, focused on studying the dynamics of shock produced by fs-laser via the energy deposition from hot electrons generated in laser-matter interactions. Due to the short laser pulse duration, pressure is not maintained in time and the shock takes the form of a blast wave.

In presented experiment, solid-density targets of aluminum and CH of various thicknesses were irradiated by the fs-laser and a full characterization of the blast wave formation and propagation was performed using several diagnostics. X-ray emission was detected by using a bremsstrahlung cannon, a Kirkpatrick-Baez and GEMPix detector. Together with electron spectrometers they provided information about hot electron temperature. Optical diagnostics (shock chronometry [5]) provided information on the propagation of the blast wave in solids. Doppler reflectometry [6] provided information on the state of the target rear surface.

The preliminary analysis of experimental results confirms the generation of a blast wave which is initially very strong and very rapidly decaying in time, confirming the estimations predicated by radiation magnetohydrodynamic, hybrid Vlasov-Fokker-Planck and particle-incell simulations.


[1] J. J. Santos, et al., New J. Phys. 19, 103005 (2017)
[2] K. Jakubowska, et al., Europhysics Letters, 119, 35001 (2017)
[3] L. J. Perkins et al., Phys. Rev. Lett. 103, 045004 (2009)
[4] D. Batani, et al., Nuclear Fusion, 54, 054009 (2014)
[5] D. Batani, et al., Laser and Particle Beams, 14, 211 (1996)
[6] S. Mondal, et al., Phys. Rev. Lett., 105, 105002 (2010)

Zoom-Meeting
https://gsi-fair.zoom.us/j/96629963798

Meeting-ID: 966 2996 3798
Kenncode: 130302

Organized by

Olga Rosmej