On the acceleration of ions in the presence of density profile steepening in a laser produced plasma

Faraday collector and calorimeter measurements of the ion emission are obtained for short CO 2 laser pulses irradiating planar polyethylene targets at intensities between 10 12 and 2 X 1013 W cm -2. The fast ion angular distribution is more peaked towards target normal than the thermal ion distribution. The hot electron temperature inferred from both the slope of the fast ion velocity distribution and the maximum ion velocity scales as 1°25 and 1°9 for irradiances respectively above and below a critical value ofI er = 5 X 10 12 W cm -2. The high irradiance scaling agrees with that of the hot electron temperature deduced from x-ray measurements. At low irradiance, the discrepancy between the ion and x-ray hot electron temperature scaling indicates that the expansion is non isothermal resulting in a cooling of the hot electrons and in a colder fast ion velocity distribution.

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On the acceleration of ions in the presence of density profile steepening in a laser produced plasma

Cited by 2 publications

References 8 publications

Magnetic field generation via linear conversion of laser radiation into leaking surface waves in laser produced plasmas

Magnetic field generation via linear conversion of laser radiation into leaking surface waves in laser produced plasmas

Irradiance scaling of fast ion expansion for CO2 laser produced plasmas

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