X射线强度关联干涉测量为实现高分辨率脉冲星信息获取提供一条可行的技术途径,但现有的X射线探测器能量分辨率有限,探测到的X射线信号有一定能谱展宽,从而导致测量精度降低。为解决这一问题,基于不同能量相干曲线之间的缩放关系,提出一种强度关联干涉测量能谱展宽校正方法。通过仿真分析了校正前后的测量误差,探讨噪声对该校正方法的影响,并进行了可见光波段的模拟干涉测量实验,结果表明校正后的测量值与理论值相符,从而验证了该方法的有效性。

X-ray intensity correlated interferometry provides a feasible technical way to realize high-resolution pulsar information acquisition. However, the energy resolution of existing X-ray detectors is limited, and the detected X-ray signals have spectrum broadening to some extent, which may result in measurement accuracy decrease. To solve this problem, a method is proposed to correct the spectrum broadening in intensity correlated interferometry based on the scaling relationship between the coherence curves at different energies. The measurement errors before and after modification are analyzed by simulation, and the influence of noise on the correction is discussed. A simulated interferometry experiment is carried out with the visible light. The results show that the measurement values after correction are consistent with the theoretical ones, thus the effectiveness of the method is validated.