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Phys Rev Lett. 2016 Jul 8;117(2):025002. doi: 10.1103/PhysRevLett.117.025002. Epub 2016 Jul 7.

First Investigation on the Radiation Field of the Spherical Hohlraum.

Huo WY1, Li Z2,3, Chen YH1, Xie X2, Lan K1,3,4, Liu J1,3,4, Ren G1, Li Y1, Liu Y2, Jiang X2, Yang D2,3, Li S2, Guo L2, Zhang H2, Hou L2, Du H2, Peng X2, Xu T2, Li C2, Zhan X2, Yuan G2, Zhang H2, Jiang B2, Huang L2, Du K2,3, Zhao R2, Li P2, Wang W2, Su J2,3, Ding Y2,3, He XT1,3,4, Zhang W5.

Author information

Institute of Applied Physics and Computational Mathematics, Beijing 100088, China.
Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang 621900, China.
Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.
Center for Applied Physics and Technology, Peking University, Beijing, 100871, China.
Chinese Academy of Engineering Physics, Mianyang 621900, China.


The first spherical hohlraum energetics experiment is accomplished on the SGIII-prototype laser facility. In the experiment, the radiation temperature is measured by using an array of flat-response x-ray detectors (FXRDs) through a laser entrance hole at four different angles. The radiation temperature and M-band fraction inside the hohlraum are determined by the shock wave technique. The experimental observations indicate that the radiation temperatures measured by the FXRDs depend on the observation angles and are related to the view field. According to the experimental results, the conversion efficiency of the vacuum spherical hohlraum is in the range from 60% to 80%. Although this conversion efficiency is less than the conversion efficiency of the near vacuum hohlraum on the National Ignition Facility, it is consistent with that of the cylindrical hohlraums used on the NOVA and the SGIII-prototype at the same energy scale.

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