Open AccessExperimental investigation on the influence of the dopant ratio on ablative Rayleigh-Taylor instability growth
Author(s) -
Yifei Yuan,
Lifeng Wang,
Shaoyong Tu,
J. F. Wu,
Zhurong Cao,
Xun Zhan,
Wenhua Ye,
Shenye Liu,
Jiang Shao-En,
Yongkun Ding,
Miao Wen-Yong
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.235203
Subject(s) - dopant , rayleigh–taylor instability , instability , amplitude , density gradient , materials science , ablative case , nonlinear system , saturation (graph theory) , rayleigh scattering , perturbation (astronomy) , foil method , atomic physics , physics , optics , doping , condensed matter physics , mechanics , quantum mechanics , medicine , radiation therapy , mathematics , combinatorics , composite material
Ablative Rayleigh-Taylor growth was measured with single-mode modulated planar CH foil with different ratio of Br dopant at Shenguang Ⅱ laser facility. Results show that CH (6% Br) sample first enters the nonlinear regime and has the largest perturbation amplitude of second harmonic. The reason is that the density gradient effects can suppress the generation of the second harmonic, the more the Br is doped, the smaller the density gradient scale length can be achieved. The density gradient effects also suppress the feedback of third-order harmonic to the fundamental mode, which induces the nonlinear saturation amplitude to exceed 0.1λ, as the classical prediction shows.