Soft x-ray emission, angular distribution of hot electrons, and absorption studies of argon clusters in intense laser pulses
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China)
High resolution soft x-ray spectra (3-40 nm) produced by the interaction of intense femtosecond laser pulses with argon clusters at an intensity of about 1x10{sup 16} W/cm{sup 2} are measured under different backing pressures. Soft x-ray spectra are strongly dependent on the initial size of cluster and plasma expanding process. We find that laser polarization has no evident effect on the soft x-ray emission from the lateral side. The measurement on angular distribution of hot electrons shows that the resonant absorption is the dominated mechanism. Both the x-ray yield and the laser energy absorption are more efficient when the radius of cluster is comparable with the plasma resonant length.
- OSTI ID:
- 21282082
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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