Dynamics of laser-driven proton acceleration exhibited by measured laser absorptivity and reflectivity

Proton acceleration from nanometer thin foils with intense laser pulses is investigated experimentally. We analyzed the laser absorptivity by parallel monitoring of laser transmissivity and reflectivity with different laser intensities when moving the targets along the laser axis. A direct correlati...

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Bibliographic Details
Published in:Scientific reports 2017-03, Vol.7 (1), p.43548-43548, Article 43548
Main Authors: Bin, J. H., Allinger, K., Khrennikov, K., Karsch, S., Bolton, P. R., Schreiber, J.
Format: Article
Language:English
Subjects:
639/624
639/766/1960/1135
Coexistence
Humanities and Social Sciences
Lasers
multidisciplinary
Science
Transmissivity
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Summary:Proton acceleration from nanometer thin foils with intense laser pulses is investigated experimentally. We analyzed the laser absorptivity by parallel monitoring of laser transmissivity and reflectivity with different laser intensities when moving the targets along the laser axis. A direct correlation between laser absorptivity and maximum proton energy is observed. Experimental results are interpreted in analytical estimation, exhibiting a coexistence of plasma expansion and light-sail form of radiation pressure acceleration (RPA-LS) mechanisms during the entire proton acceleration process based on the measured laser absorptivity and reflectivity.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep43548