Proton and Ion Beams Generated with Picosecond CO(2) Laser Pulses

Pogorelsky, Igor and Shkolnikov, Peter and Chen, Min and Pukhov, Alexander and Yakimenko, Vitaly and McKenna, Paul and Carroll, David and Neely, David and Najmudin, Zulfikar and Willingale, Louise and Stolyarov, Daniil and Stolyarova, Elena and Flynn, George (2009) Proton and Ion Beams Generated with Picosecond CO(2) Laser Pulses. AIP Conference Proceedings, 1086. pp. 532-537. ISSN 0094-243X

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Abstract

I-TW, 6-ps, circularly polarized CO(2) laser pulses focused onto thin Al foils are used to drive ion acceleration. The spectra of ions and protons generated in the direction normal to the rear surface, detected with a compact magnet spectrometer with CR39, reveals a broad proton high-energy peak at similar to 1 MeV. This observation conforms to the theoretical predictions that circularly polarized laser pulses are less efficient than linearly polarized pulses in driving ion acceleration via the Target Normal Sheath Acceleration (TNSA) mechanism. Instead, there is evidence that the circularly polarized laser may provide direct ponderomotive acceleration of ions and protons. We report also the first application of the BNL proton source in nano-science. Irradiation of graphite and graphene films produced local defects and membranes for variety of applications.

Item Type:
Journal Article
Journal or Publication Title:
AIP Conference Proceedings
Subjects:
ID Code:
79655
Deposited By:
Deposited On:
14 Jun 2016 10:04
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Mar 2020 05:30