Hydrodynamic Growth of Shell Modulations in the Deceleration Phase of Spherical Direct-Drive Implosions

Journal Article · Wed May 07 00:00:00 EDT 2003 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1558292· OSTI ID:810680

Smalyuk, V A; Delettrez, J A; Dumanis, S B; Glebov, V Yu; Goncharov, V N; Knauer, J P; Marshall, F J; Meyerhofer, D D; Radha, P B; Regan, S P; Roberts, S; Sangster, T C; Skupsky, S; Soures, J M; Stoeckl, C; Town, R P.J.; Yaakobi, B; Frenje, J A; Li, C K; Petrasso, R D ; Seguin,; H, F; McCrorey, D L; Mancini, R C; Koch, J A

OAK B204 The evolution of shell modulations was measured in targets with titanium-doped layers using differential imaging [B. Yaakobi et al., Phys. Plasmas 7, 3727 (2000)] near peak compression of direct-drive spherical implosions. Inner-shell modulations grow throughout the deceleration phase of the implosion due to the Rayleigh-Taylor instability with relative modulation levels of {approx}20% at peak neutron production and {approx}50% at peak compression ({approx}100 ps later) in targets with 1-mm-diam, 20-mm-thick shells filled with 4 atm of D3He gas. In addition, the shell modulations grow up to about 1.5 times due to Bell-Plesset convergent effects during the same period. At peak compression the inner part of the shell has a higher modulation level than other parts of the shell.

• Research Organization: University of Rochester-Laboratory for Laser Energetics (US)
• Sponsoring Organization: (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 810680
• Report Number(s): DE/SF-19460-489; 1362; 2002-86; TRN: US200318%%295
• Journal Information: Physics of Plasmas, Vol. 10, Issue 5; Other Information: Submitted to Physics of Plasmas; Volume 10: No.5; PBD: 7 May 2003
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
COMPRESSION
HYDRODYNAMICS
IMPLOSIONS
MODULATION
NEUTRONS
PRODUCTION
RAYLEIGH-TAYLOR INSTABILITY
TARGETS