宽电磁束II对薄圆柱靶的有效加热
Efficient Heating of Thin Cylindrical Targets by Broad Electromagnetic Beams II
摘要：
在第一部分（物理学/0405091），它表明，它是可能的，以实现有效加热的圆柱形目标的电磁束的横向尺寸是几个数量级大于那些圆柱体。第二部分推导了纵向几何结构中有效加热的详细条件，并建立了一个更广泛的参数域，在横向几何结构中提供有效加热。考虑了使用当前可用技术的一种可能的实施方式：纳米管（长度1 cm，直径15 nm）可以通过50 GW Ti：Sapphire激光器（波长800 nm）的30飞秒脉冲以16%的加热效率在横向几何形状中加热到1 keV的温度。所得到的能量密度超过100 MJ/cm 3。本文给出了高斯电磁束加热圆柱体时，圆柱体吸收能量的一维积分形式的精确公式。
英文摘要：
In Part I (physics/0405091), it was shown that it is possible to achieve efficient heating of cylindrical targets by electromagnetic beams with transverse dimensions that are several orders of magnitude greater than those of the cylinder. Part II contains derivation of the detailed conditions of efficient heating in the longitudinal geometry and establishes a broader domain of parameters providing efficient heating in the transverse geometry. One possible implementation using currently available technology is considered: a nanotube (length 1 cm, diameter 15 nm) may be heated in the transverse geometry by a 30 femtosecond pulse of a 50 GW Ti:Sapphire laser (wavelength 800 nm) to a temperature of 1 keV with heating efficiency of 16 per cent. The resulting energy density exceeds 100 MJ/cm3. An exact formula in the form of a one-dimensional integral is obtained for the amount of energy absorbed in the cylinder heated by a gaussian electromagnetic beam in the longitudinal geometry.
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