Measurement of acceleration in femtosecond laser-plasmas
- Institut fuer Optik und Quantenelektronik, Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, D-07743 Jena (Germany)
Accelerations up to 4x10{sup 19} m/s{sup 2} are measured in femtosecond laser-produced plasmas at intensities of 10{sup 18} W/cm{sup 2} using the Frequency Resolved Optical Gating (FROG) technique. A high density plasma is formed by focusing an ultrashort unchirped laser pulse on a plane carbon target and part of the reflected pulse is eventually detected by a FROG autocorrelator. Radiation pressure and thermal pressure accelerate the plasma which causes a chirp in the reflected laser pulse. The retrieved phase and amplitude information reveal that the plasma motion is dominated by the large light pressure which pushes the plasma into the target. This is supported by theoretical estimates and by the results of independently measured time integrated spectra of the reflected pulse.
- OSTI ID:
- 21185571
- Journal Information:
- AIP Conference Proceedings, Vol. 426, Issue 1; Conference: International conference on superstrong fields in plasmas, Varenna (Italy), 27 Aug - 2 Sep 1997; Other Information: DOI: 10.1063/1.55202; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Acceleration in femtosecond laser-produced plasmas
Characterization of arbitrary femtosecond pulses using frequency-resolved optical gating