Observation of modulations in Lyman-{alpha} line profiles of multicharged ions in clusters irradiated by femtosecond laser pulses: Effect of a dynamic electric field
- A.M. Prokhorov Institute of General Physics, Russian Academy of Sciences, Vavilov Str. 38, Moscow 119991 (Russian Federation)
- Multicharged Ions Spectra Data Center of VNIIFTRI, Mendeleevo, Moscow Region, 141570 (Russian Federation)
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States)
Profiles of the Ly{sub {alpha}} line of O VIII ions in N{sub 2}O clusters irradiated by fs laser pulses (laser flux up to 4x10{sup 17} W/cm{sup 2}) were recorded. The features (peaks and dips) in the Ly{sub {alpha}} O VIII line profiles were observed. The experimental spectra were simulated theoretically assuming that strong oscillating electric fields are generated in the cluster plasma. We showed that allowing for oscillating electric fields of the amplitude E{sub 0}{approx}(0.5-1.0)x10{sup 9} V/cm and frequency {omega}{approx}(0.7-2.4)x10{sup 15} s{sup -1} leads to spectral features in the theoretical profiles of the Ly{sub {alpha}} O VIII line that are similar to the features observed experimentally. Possible mechanisms responsible for the generation of strong oscillating electric fields in the cluster plasma are discussed.
- OSTI ID:
- 20786727
- Journal Information:
- Physical Review. A, Vol. 73, Issue 1; Other Information: DOI: 10.1103/PhysRevA.73.013203; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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