Effects of nonuniform illumination on implosion asymmetry in direct-drive inertial confinement fusion.
Target areal density (rhoR) asymmetries in OMEGA direct-drive spherical implosions are studied. The rms variation <deltarhoR>/<rhoR> for low-mode-number structure is approximately proportional to the rms variation of on-target laser intensity <deltaI>/<I> with an amplification factor of approximately 1/2(C(r)-1), where C(r) is the capsule convergence ratio. This result has critical implications for future work on the National Ignition Facility as well as OMEGA.
Li
C K
CK
Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Séguin
F H
FH
Frenje
J A
JA
Petrasso
R D
RD
Delettrez
J A
JA
McKenty
P W
PW
Sangster
T C
TC
Keck
R L
RL
Soures
J M
JM
Marshall
F J
FJ
Meyerhofer
D D
DD
Goncharov
V N
VN
Knauer
J P
JP
Radha
P B
PB
Regan
S P
SP
Seka
W
W