Research of asymmetry of radiation drive implosion on ShenGuang II laser facility

Summary form only given, as follows. Good radiation drive symmetry is crucial for forming hot core in inertial confinement fusion. In practice in hohlraum x-ray flux is asymmetrical. So it is necessary to optimize the parameters of hohlraum for forming better x-ray drive symmetry. Using 2D numerical code LARED-I, a series of results of asymmetrical compression are obtained with variation of length of hohlraum. In experiments on ShenGuang II laser facility, by x-ray imaging of the self-emission from the compressed dense core, asymmetrical implosion is diagnosed X-ray imaging of the distorted core of capsule provides a picture that can be compared with theoretical modeling. On the other hand, asymmetry of implosion decreases DD neutron yield.