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MeV negative ion generation from ultra-intense laser interaction with a water spray

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13 Author(s)
Ter-Avetisyan, S. ; School of Mathematics and Physics, The Queen’s University Belfast, BT7 1NN, United Kingdom ; Ramakrishna, B. ; Borghesi, M. ; Doria, D.
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MeV negative oxygen ions are obtained from a water spray target irradiated by high intensity (5 × 1019 W/cm2) and ultrashort (50 fs) laser pulses. Generation of negative ions is ascribed to electron-capture processes that the laser-accelerated high-energy positive ion experiences when it interacts with atoms in the spray. This mechanism implies the existence of a large number of MeV neutral oxygen atoms, which is consistent with indirect experimental evidence.

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Applied Physics Letters  (Volume:99 ,  Issue: 5 )