针对脉冲氙灯的结构，探索了一种新型的环形截面氙灯以获得更高的泵浦效率。环形截面氙灯内嵌空气玻璃管，拥有中空的新结构，对脉冲氙灯放电特性产生了新的影响，进一步影响了泵浦效率。实验对比了传统氙灯和环形截面氙灯的放电特性、辐射以及钕玻璃的荧光输出。实验结果表明：新型的环形截面氙灯拥有较高的电阻，较低的放电电流与进灯能量，辐射效率和钕玻璃荧光输出分别提高了3%~4%和2%~3%。

The improvement of the amplifier gain and amplifier efficiency is quite attractive in inertia confined fusion (ICF). As an important component of the amplifier, the flash lamp pumping efficiency directly affects the amplifier efficiency. In this paper, a new structure of flash lamp is designed and constructed, going for a higher pumping efficiency. Comparison between the new and the traditional structures are made, in terms of electrical characteristics, radiation and fluorescence behaviors of Nd:glass. Experimental results indicate that the resistance increases in the new structure, corresponding to a lower current and energy feeding. As a result, the intensities of radiation and fluorescence are improved by 3%~4% and 2%~3% respectively. The mechanisms of the improvement, the evolution of the discharge plasma channel, and the scheme of further optimization for the new structure are discussed.