等离子体对高功率微波的防护  

Protection against high power microwave using plasma

作　　者：杨耿[1] 谭吉春[1] 盛定仪[1] 杨雨川[1] 

机构地区：[1]国防科技大学理学院,长沙410073

出　　处：《核聚变与等离子体物理》2008年第1期90-93,共4页Nuclear Fusion and Plasma Physics

基　　金：武器装备预研基金资助项目(51421-KG0152)

摘　　要：提出了用等离子体防护高功率微波破坏电子设备的方法。建立了"介质层-等离子体层-介质层-等离子体层"的反射/吸收模型,其中两层均匀非磁化等离子体厚度各为50mm,等离子体频率为30GHz,等离子碰撞频率为70GHz。计算了微波的透射功率、防护结构的最小防护距离。计算结果表明:对功率10GW、脉冲宽度100ns、天线100m2(效率50%)的微波源产生的微波,频率小于30GHz时,将被防护装置反射;频率为31～80GHz时,防护结构的最小防护距离约为5km。Protection against high power microwave using plasma was proposed. A reflection/absorption sandwich model of ＂medium slab-plasma slab-medium slab-plasma slab＂ was established, where the thickness for the un-magnetized uniform plasma is 50mm, the plasma frequency 30GHz, and collision frequency 70GHz. Then the transmitted power of electromagnetic wave and the minimal protecting-distance of protector were calculated. The results show that for a microwave source with 10GW power, 100ns pulse width, 100m^2 antenna area （with efficiency of 50%）, the emitted microwave will be reflected when the frequency is less than 30GHz; or the minimal protecting-distance of protector is about 5km when the frequency is within 31 - 80GHz.

关 键 词：高功率微波 等离子体 透射功率 防护 

分 类 号：O539[理学—等离子体物理]