Laser ion acceleration via control of the near-critical density target.
Duration-controlled amplified spontaneous emission with an intensity of 10(13) W/cm(2) is used to convert a 7.5-microm -thick polyimide foil into a near-critical plasma, in which the p -polarized, 45-fs , 10(19) -Wcm (2) laser pulse generates 3.8-MeV protons, emitted at some angle between the target normal and the laser propagation direction of 45 degrees . Particle-in-cell simulations reveal that the efficient proton acceleration is due to the generation of a quasistatic magnetic field on the target rear side with magnetic pressure inducing and sustaining a charge separation electrostatic field.
Yogo
A
A
Kansai Photon Science Institute, Japan Atomic Energy Agency (JAEA), Kyoto 619-0215, Japan.
Daido
H
H
Bulanov
S V
SV
Nemoto
K
K
Oishi
Y
Y
Nayuki
T
T
Fujii
T
T
Ogura
K
K
Orimo
S
S
Sagisaka
A
A
Ma
J-L
JL
Esirkepov
T Zh
TZh
Mori
M
M
Nishiuchi
M
M
Pirozhkov
A S
AS
Nakamura
S
S
Noda
A
A
Nagatomo
H
H
Kimura
T
T
Tajima
T
T