Nano and micro structured targets to modulate the spatial profile of laser driven proton beams
Journal article, 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.
Beam dynamics
Accelerator Applications
Author
L. Giuffrida
Czech Academy of Sciences
Krister Svensson
Lund University
J. Psikal
Czech Technical University in Prague
Czech Academy of Sciences
D. Margarone
Czech Academy of Sciences
P. Lutoslawski
Czech Academy of Sciences
V. Scuderi
National Institute for Nuclear Physics
Czech Academy of Sciences
G. Milluzzo
National Institute for Nuclear Physics
J. Kaufman
Czech Academy of Sciences
T. Wiste
Czech Academy of Sciences
M. Dalui
Lund University
H. Ekerfelt
Lund University
I. G. Gonzalez
Lund University
O. Lundh
Lund University
A. Persson
Lund University
A. Picciotto
Fondazione Bruno Kessler (FBK)
M. Crivellari
Fondazione Bruno Kessler (FBK)
A. Bagolini
Fondazione Bruno Kessler (FBK)
P. Bellutti
Fondazione Bruno Kessler (FBK)
Joel Magnusson
Chalmers, Physics, Theoretical Physics
Arkady Gonoskov
Chalmers, Physics, Theoretical Physics
L. Klimsa
Czech Academy of Sciences
J. Kopecek
Czech Academy of Sciences
T. Lastovicka
Czech Academy of Sciences
G. A. P. Cirrone
National Institute for Nuclear Physics
C.G. Wahlström
Lund University
G. Korn
Czech Academy of Sciences
Journal of Instrumentation
17480221 (eISSN)
Vol. 12 3 article no C03040 - C03040Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1088/1748-0221/12/03/C03040