Possible ionization ``ignition`` in laser-driven clusters
- Univ. of California, San Diego, La Jolla, CA (United States)
The authors use Classical Trajectory Monte Carlo (CTMC) simulations to study the ionization of small rare gas clusters in short pulse, high intensity laser fields. They calculate, for a cluster of 25 neon atoms, the ionization stage reached and the average kinetic energy of the ionized electrons as functions of time and peak laser intensity. The CTMC calculations mimic the results of the much simpler barrier suppression model in the limit of isolated atoms. At solid density the results give much more ionization in the cluster than that predicted by the barrier suppression model. They find that when the laser intensity reaches a threshold value such that on average one electron is ionized from each atom, the cluster atoms rapidly move to higher ionization stages, approaching Ne{sup +8} in a few femtoseconds. This ignition process creates an ultrafast pulse of energetic electrons in the cluster at quite modest laser intensities.
- OSTI ID:
- 379751
- Report Number(s):
- CONF-9507222-; ISBN 0-8194-1882-X; TRN: 96:025259
- Resource Relation:
- Conference: SPIE applications of laser plasma radiation II, San Diego, CA (United States), 12-14 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Applications of laser plasma radiation 2; Richardson, M.C.; Kyrala, G.A. [eds.]; PB: 333 p.; Proceedings/SPIE, Volume 2523
- Country of Publication:
- United States
- Language:
- English
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