X射线脉冲星能谱模拟方法
Energy spectrum simulation method of X-ray pulsar
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摘要: 为探索X射线脉冲星能谱特征对X射线脉冲星导航的作用,提出了一种模拟X射线脉冲星能谱的方法。该方法利用X射线管模拟X射线信号,并通过阳极高压控制X射线管出射能谱,根据不同阳极高压下X射线管出射谱特征,采用最小二乘法拟合得到阳极高压随时间的变化曲线,从而实现X射线脉冲星能谱的地面模拟。进行了相应的数学建模仿真,仿真结果证明了该方法的可行性。完成了地面模拟实验,实验结果表明,利用该方法模拟得到的X射线脉冲星能谱与真实能谱的相似度达到79%。此外,为完善模拟X射线脉冲星特性,在能谱模拟的基础上提出了X射线脉冲星能谱和流量同时模拟的方案。这些工作为将来在地面验证X射线探测器性能和导航算法提供了实验平台。Abstract: In order to explore the significance of X-ray pulsar spectra for X-ray pulsar navigation, an X-ray pulsar energy simulation method was proposed. In this paper, X-ray tube was used to produce X-ray signals, and emission spectroscopy was controlled with anode voltage. To achieve X-ray pulsar spectrum simulation, least squares was used to obtain anode voltage curve, and then ground experiment was realized. Mathematical modeling and simulation were implemented, and the corresponding results prove the feasibility of this method. Furthermore, ground experiments were carried out, experimental results show that the similarity of X-ray pulsar spectra between experimental and actual is almost 79%. In addition, a scheme of simulating X-ray pulsar energy and flow simultaneously was proposed based on above energy simulation. These works can provide an experimental platform for future X-ray detector and navigation algorithm.
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