Abstract
We report here energetic negative hydrogen ions generated in the interaction of moderately intense ultrashort laser pulses (45 fs) with transparent hydrogen containing solid targets. An unambiguous and consistent detection of negative hydrogen ions, with a flux of ions/sr, has been observed in every single laser shot, using a Thomson parabola ion spectrograph. Simple estimates based on charge transfer cross sections match well with experimental observations. Our method offers the implementation of an intense, ultrashort laser based negative-ion source at a higher repetition rate, which can be important for various applications.
- Received 29 May 2014
DOI:https://doi.org/10.1103/PhysRevE.92.051103
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