359 / 2019-02-27 21:50:03

Experimental study of the plasma behavior in the key regions of ICF Hohlraum in SG-series laser facilities

inertial confinement fusion,hohlraum plasma,Thomson scattering

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Laser-driven high-Z hohlraum is used to provide intense x-ray radiation source for driving the capsule implosion in indirect-dirve inertial confinement fusion (ICF). With the campaigns of hohlraum energetics and implosion physics in NIF, the lack of advanced knowledge on laser-hohlraum coupling process has shown the complexity of hohlraum environment. Recently, several experiments have been planed and been done for the research of plasma behavior in the key regions of ICF hohlraum in Shenguang (SG) laser facilities. Under a laser intensity and width close to those of an ignition main pulse, the movement of a high-Z plasma bubble has been studied uing gas-filled open-end gold hohlraums. Under a quasi-2d environment, the plasmas evolution and the dynamic effect in different regions of the hohlraum, including around the LEH, in the gas, or in the bubble, have been preliminary understood by developing 4w Thomson scattering technique. Furthermore, the detailed mix state around the gold bubble-gas interface, which is the key region of the hohlraum, will be studied by a novel method in next step.