X-ray spectra from high-intensity subpicosecond laser produced plasmas
- Max-Planck-Group ``X-Ray Optics`` at the Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743 Jena (Germany)
- Max-Planck-Institute of Biophysical Chemistry, Department of Laserphysics, Am Fassberg, 37077 Goettingen (Germany)
The interaction of high-intensity subpicosecond KrF*-laser pulses with aluminum plasmas has been investigated. The laser pulse absorption and the x-ray production have been related at a series of intensities up to 10{sup 17} W/cm{sup 2} and different angles of incidence. Soft x-ray spectra were measured in the wavelength range from 7 to 150 A with various spectrographs. The spectra show distinct dependences on the laser intensity, the polarization, and the angle of incidence. The observed dependence of the spectra on the intensity and on the angle of incidence is the result of both the angular dependence of the laser pulse absorption and that of the conversion efficiency {ital of} {ital the} {ital absorbed} {ital energy} into soft x-ray emission. The spectra are influenced by the size of the absorption volume, the electron density where the absorption mainly takes place, and other parameters, such as the electron temperature. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 165036
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 2; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Subpicosecond KrF{asterisk}-laser plasma interaction at intensities between 10{sup 14} and 10{sup 17} W/cm{sup 2}
Reflectivity of laser-produced plasmas generated by a high intensity ultrashort pulse