Energetic negative ion and neutral atom beam generation at passage of laser accelerated high energy positive ions through a liquid spray

F. Abicht; R. Prasad; G. Priebe; J. Braenzel; L. Ehrentraut; A. Andreev; P. V. Nickles; M. Schnürer; V. Tikhonchuk; Sargis Ter-Avetisyan

doi:10.1117/12.2019505

7 May 2013 Energetic negative ion and neutral atom beam generation at passage of laser accelerated high energy positive ions through a liquid spray

F. Abicht, R. Prasad, G. Priebe, J. Braenzel, L. Ehrentraut, A. Andreev, P. V. Nickles, M. Schnürer, V. Tikhonchuk, Sargis Ter-Avetisyan

Author Affiliations +

Proceedings Volume 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 (2013) https://doi.org/10.1117/12.2019505
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

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.

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F. Abicht, R. Prasad, G. Priebe, J. Braenzel, L. Ehrentraut, A. Andreev, P. V. Nickles, M. Schnürer, V. Tikhonchuk, and 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); https://doi.org/10.1117/12.2019505

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