Intense nickel-K-photon irradiation from weakly-ionized linear plasma x-ray source with a reflector
Intense nickel-K-photon irradiation from weakly-ionized linear plasma x-ray source with a reflector
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带有反射器的弱电离线性等离子体 X 射线源的强镍 K 光子辐射
DOI：
10.1117/12.2526546
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Sato;E.;Sato;Y.;Yoshida;S.;Yoshioka;K.;Moriyama;H.;Watanabe;M.
线性等离子体闪光X射线发生器由高压电源、200-nF高压聚光器、涡轮分子泵和可拆卸闪光X射线管组成。在闪光X射线发生器中，聚光器由电源充电至50千伏，然后通过真空放电产生闪光X射线。X射线管是一个可拆卸的三极管，带有一个棒状的镍(Ni)靶和一个镍反射器。镍靶的蒸发导致靶周围形成由镍离子和电子组成的弱电离线性等离子体。在等离子体中产生K系列特征X射线光子(K光子)，能量超过Ni-K边能量的韧致辐射光子被等离子体吸收并转化为Ni-K光子。随后，来自镍反射器的镍-钾光子很容易穿透线性镍等离子体。因此，K射线自发辐射放大(Kaser)从等离子体轴向照射强烈的Ni-K光子(射线)。
The linear-plasma flash X-ray generator consists of a high-voltage power supply, a 200-nF high-voltage condenser, a turbomolecular pump, and a demountable flash X-ray tube. In the flash X-ray generator, the condenser is charged up to 50 kV by the power supply, and flash X-rays are then produced by the vacuum discharging. The X-ray tube is a demountable triode with a rod-shaped nickel (Ni) target and a Ni reflector. The Ni-target evaporation leads to the formation of weakly ionized linear plasma, consisting of Ni ions and electrons, around the target. In the plasma, K-series characteristic X-ray photons (K photons) are produced, and bremsstrahlung photons with energies beyond the Ni-K-edge energy are absorbed by the plasma and converted into Ni-K photons. Subsequently, Ni-K photons from the Ni reflector easily penetrate the linear Ni plasma. Thus, intense Ni-K photons (rays) are irradiated from the plasma axial direction by K-ray amplification by spontaneous emission of radiation (KASER).