Reduction of the Rayleigh-Taylor instability growth with cocktail color irradiation

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2817092· OSTI ID:21072699

Otani, K; Shigemori, K; Sakaiya, T; Fujioka, S; Sunahara, A; Nakai, M; Shiraga, H; Azechi, H; Mima, K ^[1]

---

1. Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871 (Japan)

A novel method for reducing the Rayleigh-Taylor instability (RTI) growth in inertial confinement fusion (ICF) targets is reported. It is well known that high-density compression of ICF targets is potentially prevented by the RTI. Previous studies [K. Shigemori et al., Phys. Rev. Lett. 78, 250 (1997), S. G. Glendinning et al., Phys. Rev. Lett. 78, 3318 (1997), and H. Azechi et al., Phys. Plasmas 4, 4079 (1997)] have indicated that nonlocal electron heat transport enhances the effect on the ablative stabilization of the RTI growth with long wavelength laser irradiation. Planar target experiments, using a small fraction of a long wavelength laser ({lambda}=0.53 or 1.05 {mu}m) in addition to the main drive laser ({lambda}=0.35 {mu}m), were conducted to verify the RTI reduction by inducing the effect of the nonlocal electron heat transport. The measured RTI growth rate for this ''cocktail-color'' laser irradiation was clearly reduced from that for the ''single-color'' short-wavelength laser irradiation. The experimental growth factors are in good agreement with the ablative RTI formula coupled with a one-dimensional Fokker-Planck simulation code.

• OSTI ID: 21072699
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPRESSION
DENSITY
ELECTRONS
FOKKER-PLANCK EQUATION
GROWTH FACTORS
HEAT TRANSFER
ICF DEVICES
INERTIAL CONFINEMENT
IRRADIATION
LASER RADIATION
LASER TARGETS
LASER-PRODUCED PLASMA
LASERS
LIGHT TRANSMISSION
PLASMA SIMULATION
RAYLEIGH-TAYLOR INSTABILITY
STABILIZATION
WAVELENGTHS