7 May 2013 Energetic negative ion and neutral atom beam generation at passage of laser accelerated high energy positive ions through a liquid spray
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Abstract
Beams of energetic negative ions and neutral atoms are obtained from water and ethanol spray targets irradiated by high intensity (5×1019 W/cm2) and ultrashort (50 fs) laser pulses. The resulting spectra were measured with the Thomson parabola spectrometer, which enabled absolute measurements of both: positive and negative ions. The generation of a beam of energetic neutral hydrogen atoms was confirmed with CR-39 track detectors and their spectral characteristics have been measured using time of flight technique. Generation is ascribed to electron-capture and -loss processes in the collisions of laser-accelerated high-energy protons with spray of droplets. The same method can be applied to generate energetic negative ions and neutral atoms of different species.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
F. Abicht, R. Prasad, G. Priebe, J. Braenzel, L. Ehrentraut, A. Andreev, P. V. Nickles, M. Schnürer, V. Tikhonchuk, Sargis Ter-Avetisyan, "Energetic negative ion and neutral atom beam generation at passage of laser accelerated high energy positive ions through a liquid spray", Proc. SPIE 8779, Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III, 87790M (7 May 2013); doi: 10.1117/12.2019505; https://doi.org/10.1117/12.2019505
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