Multistep Ionization of Argon Clusters in Intense Femtosecond Extreme Ultraviolet Pulses

Journal Article · Fri Apr 04 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.133401· OSTI ID:21123812

Bostedt, C; Thomas, H; Hoener, M; Eremina, E; Fennel, T; Meiwes-Broer, K -H; Wabnitz, H; Kuhlmann, M; Ploenjes, E; Tiedtke, K; Treusch, R; Feldhaus, J; Moeller, T ^[1]; Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg ^[2]

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1. Institut fuer Optik und Atomare Physik, Technische Universitaet Berlin, Eugene-Wigner-Bldg. EW 3-1, Hardenbergstr. 36, 10623 Berlin (Germany)
2. Germany

The interaction of intense extreme ultraviolet femtosecond laser pulses ({lambda}=32.8 nm) from the FLASH free electron laser (FEL) with clusters has been investigated by means of photoelectron spectroscopy and modeled by Monte Carlo simulations. For laser intensities up to 5x10{sup 13} W/cm{sup 2}, we find that the cluster ionization process is a sequence of direct electron emission events in a developing Coulomb field. A nanoplasma is formed only at the highest investigated power densities where ionization is frustrated due to the deep cluster potential. In contrast with earlier studies in the IR and vacuum ultraviolet spectral regime, we find no evidence for electron emission from plasma heating processes.

• OSTI ID: 21123812
• Journal Information: Physical Review Letters, Vol. 100, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.100.133401; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
COMPUTERIZED SIMULATION
COULOMB FIELD
ELECTRON EMISSION
EXTREME ULTRAVIOLET RADIATION
FREE ELECTRON LASERS
IONIZATION
MONTE CARLO METHOD
PHOTOELECTRON SPECTROSCOPY
PLASMA HEATING
POWER DENSITY
PULSES