Effect of reentrant cone geometry on energy transport in intense laser-plasma interactions.
The energy transport in cone-guided low- Z targets has been studied for laser intensities on target of 2.5x10(20) W cm(-2). Extreme ultraviolet (XUV) imaging and transverse optical shadowgraphy of the rear surfaces of slab and cone-slab targets show that the cone geometry strongly influences the observed transport patterns. The XUV intensity showed an average spot size of 65+/-10 microm for slab targets. The cone slabs showed a reduced spot size of 44+/-10 microm. The shadowgraphy for the aforementioned shots demonstrate the same behavior. The transverse size of the expansion pattern was 357+/-32 microm for the slabs and reduced to 210+/-30 microm. A transport model was constructed which showed that the change in transport pattern is due to suppression of refluxing electrons in the material surrounding the cone.
Lancaster
K L
KL
STFC Rutherford Appleton Laboratory, Chilton, Oxon, United Kingdom.
Sherlock
M
M
Green
J S
JS
Gregory
C D
CD
Hakel
P
P
Akli
K U
KU
Beg
F N
FN
Chen
S N
SN
Freeman
R R
RR
Habara
H
H
Heathcote
R
R
Hey
D S
DS
Highbarger
K
K
Key
M H
MH
Kodama
R
R
Krushelnick
K
K
Nakamura
H
H
Nakatsutsumi
M
M
Pasley
J
J
Stephens
R B
RB
Storm
M
M
Tampo
M
M
Theobald
W
W
Van Woerkom
L
L
Weber
R L
RL
Wei
M S
MS
Woolsey
N C
NC
Yabuuchi
T
T
Norreys
P A
PA
D003198:Computer Simulation; D004735:Energy Transfer / Q000528:radiation effects*; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects*; D006358:Hot Temperature; D007834:Lasers; D008956:Models, Chemical
D005740:Gases