Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Focusing of laser-accelerated proton beams with active plasma lens

Sep 18, 2019, 4:40 PM
SBIO (Hotel Biodola)


Hotel Biodola

talk WG2-WG5 Joint Session WG2 - WG5 (Joint Session)


Jianhui Bin (Lawrence Berkeley National Laboratory)


We report on the first experimental demonstration of radially symmetric focusing of laser-accelerated proton beams with an active plasma lens which provides tunable field gradients of the order of kT/m. MeV level proton beams generated from micrometer solid density targets interacting with a relativistically intense laser were used to examine the focusability and robustness of this new approach. By varying field gradients of the active plasma lens, proton beams with mm focus spot size at selected energies were achieved at a distance of 1.5 meters behind the source. Results were supported by simple numerical calculations. Work towards retrieval of the proton beam source properties (source size, emittance) by combining these methods with dipole magnetic dispersion will be discussed as well.

The work was supported by Laboratory Directed Research and Development (LDRD) funding from Lawrence Berkeley National Laboratory provided by the Director, and the U.S. Department of Energy Office of Science Offices of High Energy Physics and Fusion Energy Sciences, under Contract No. DE-AC02-05CH11231. Work at BELLA was also supported by LaserNetUS ( J.H.Bin acknowledges financial support from the Alexander von Humboldt Foundation.

Primary author

Jianhui Bin (Lawrence Berkeley National Laboratory)


Sven Steinke (Lawrence Berkeley National Laboratory) Qing Ji (Lawrence Berkeley National Laboratory) Dr Kei Nakamura (LBNL) Anthony Gonsalves (LBNL) Stepan Bulanov (Lawrence Berkeley National Laboratory) Dr Geddes Cameron (LBNL) Carl Schroeder (Lawrence Berkeley National Laboratory) Dr Thomas Schenkel (Lawrence Berkeley National Laboratory) Dr Eric Esarey (LBNL)

Presentation materials