Nano and micro structured targets to modulate the spatial profile of laser driven proton beams
Paper in proceeding, 2017
Nano and micro structured thin (μ m-scale) foils were designed, fabricated and irradiated with the high intensity laser system operating at LLC (Lund Laser Centre, Sweden) in order to systematically study and improve the main proton beam parameters. Nano-spheres deposited on the front (laser irradiated) surface of a flat Mylar foil enabled a small enhancement of the maximum energy and number of the accelerated protons. Nano-spheres on the rear side allowed to modify the proton beam spatial profile. In particular, with nanospheres deposited on the rear of the target, the proton beam spatial homogeneity was clearly enhanced. Silicon nitride thin foils having micro grating structures (with different step dimensions) on the rear surface were also used as targets to influence the divergence of the proton beam and drastically change its shape through a sort of stretching effect. The target fabrication process used for the different target types is described, and representative experimental results are shown and discussed along with supporting 3D particle-in-cell simulations. © 2017 IOP Publishing Ltd and Sissa Medialab srl.
Accelerator Applications
Beam dynamics
Author
L. Giuffrida
Institute of Physics of the Academy of Sciences of the Czech Republic
Krister Svensson
Lunds Universitet
J. Psikal
Institute of Physics of the Academy of Sciences of the Czech Republic
Ceske vysoke uceni technicke v Praze
D. Margarone
Institute of Physics of the Academy of Sciences of the Czech Republic
P. Lutoslawski
Institute of Physics of the Academy of Sciences of the Czech Republic
V. Scuderi
Institute of Physics of the Academy of Sciences of the Czech Republic
INFN - Laboratori Nazionali del Sud
G. Milluzzo
INFN - Laboratori Nazionali del Sud
J. Kaufman
Institute of Physics of the Academy of Sciences of the Czech Republic
T. Wiste
Institute of Physics of the Academy of Sciences of the Czech Republic
M. Dalui
Lunds Universitet
H. Ekerfelt
Lunds Universitet
I. G. Gonzalez
Lunds Universitet
O. Lundh
Lunds Universitet
A. Persson
Lunds Universitet
A. Picciotto
Fondazione Bruno Kessler
M. Crivellari
Fondazione Bruno Kessler
A. Bagolini
Fondazione Bruno Kessler
P. Bellutti
Fondazione Bruno Kessler
Joel Magnusson
Chalmers, Physics, Theoretical Physics
Arkady Gonoskov
Chalmers, Physics, Theoretical Physics
L. Klimsa
Institute of Physics of the Academy of Sciences of the Czech Republic
J. Kopecek
Institute of Physics of the Academy of Sciences of the Czech Republic
T. Lastovicka
Institute of Physics of the Academy of Sciences of the Czech Republic
G. A. P. Cirrone
INFN - Laboratori Nazionali del Sud
C.G. Wahlström
Lunds Universitet
G. Korn
Institute of Physics of the Academy of Sciences of the Czech Republic
Journal of Instrumentation
1748-0221 (ISSN)
Vol. 12 3 article no C03040 -Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1088/1748-0221/12/03/C03040