Abstract
A narrow band proton bursts at energies of 1.6 +/- 0.08 MeV were observed when a water spray consisting of empty set(150 nm)-diameter droplets was irradiated by an ultrashort laser pulse of about 45 fs duration and at an intensity of 5 X 10(19) W/cm(2). The results are explained by a Coulomb explosion of sub-laser-wavelength droplets composed of two ion species. The laser prepulse plays an important role. By pre-evaporation of the droplets, its diameter is reduced so that the main pulse can interact with a smaller droplet, and this remaining bulk can be ionized to high states. In the case of water, the mixture of quite differently charged ions establishes an
Original language | English |
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Article number | 083113 |
Pages (from-to) | 083113 |
Number of pages | 1 |
Journal | Physics of Plasmas |
Volume | 17 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2010 |
ASJC Scopus subject areas
- Condensed Matter Physics