415 / 2019-02-28 21:36:19

DD Implosion Mixing Effect Study Using X-ray Spectroscopy

Mixing effect,X-ray spectroscopy,Implosion

全体主题 > Laser and Particle Beam Fusion

In the field of inertial confinement fusion (ICF) research, ablator mixing into fusion fuel due to hydrodynamic instability growth is a key issue for hampering the ignition. The performance of the ICF implosions could be significantly degraded by the mixed high-Z ablator material. X-ray spectroscopy is a very useful approach to look into the underlying physics of the mixing effect.
In this talk, we present the pre-doping indirect-driven implosion experiment which was conducted using 48 beams of lasers with total energy of 60kJ, and the squared laser pulse width is 1.6ns. The atomic fraction of argon was set as 0%, 0.2% and 0.5%, and the total pressure of fusion fuel is about 15atm. The time-resolved K-shell x-ray emission of the argon trace element was observed by a streaked crystal spectrometer. The size of hot-spot x-ray emission was recorded by a time-gated x-ray pin-hole-array camera. The neutron yields were detected by both plastic scintillator and In-activation detectors, and the ion temperature was measured by neutron time of flight spectrometer. The fusion reaction history was observed by a neutron streaked camera. From the integrated experimental results, the mixing effect of the DD implosion will be analyzed comprehensively.