Hard x-ray emission from intense short pulse laser plasmas
- Max-Born-Institut, Rudower Chaussee 6, 12489 Berlin (Germany)
- P. N. Lebedev Physical Institute, Leninsky prospect 53, 117924 Moscow (Russian Federation)
- Physikalisch-Technische Bundesanstalt, Postfach 3345, 38023 Braunschweig (Germany)
Hard x-ray emission in the range of 100 keV has been measured from plasmas produced by irradiation of solid targets with ps laser pulses up to 7{times}10{sup 17} W/cm{sup 2}. The experimental data obtained for oblique incidence of {ital p}-polarized laser light at different illumination angles are compared to computer calculations, which include the processes of resonance absorption and vacuum heating. The scaling of hard x-ray emission with varying laser flux is consistent with the theoretical model of bremsstrahlung emission of hot electrons. From this, together with an absolute radiation dose measured with calibrated detectors, a transfer of up to 50% of the incident laser energy to suprathermal ({similar_to}10...100 keV) electrons is estimated. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- OSTI ID:
- 165377
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 2; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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