强流脉冲离子束能量密度分布的红外诊断

强流脉冲离子束在靶上的能量密度分布是其研究和应用的一个重要参数。为了解决现有束流能量密度诊断方法的不足,利用红外成像仪测量靶背面的温度分布,从而建立了强流脉冲离子束能量密度分布的红外诊断方法。对能量密度1J/cm2量级、脉冲宽度为102 ns量级的束流,该方法测量误差好于5%,空间分辨率可达到1~2mm,具有操作简便、成本低的优点,是强脉冲能量沉积分布的一种高效迅速的诊断方法。

Infrared imaging diagnostics of the energy density distribution at the intense pulsed ion beam cross-section

One of the most important parameters of the intense pulsed ion beam(IPIB) is the distribution of the energy density at the cross section. Aiming to solve the problem of traditional diagnostic methods for beam energy density, we measured the temperature distribution of the reverse side of target by infrared camera to develop the infrared diagnostic techniques of IPIB energy density distribution. For IPIB of energy density about 1 J/cm2 and pulse width about 100 ns, the error using this method is less than 5% and the spatial resolution achieves 1-2 mm. The method has the advantages of easy operation and low cost, it is an efficient prompt monitoring method for the IPIB energy density distribution.