论文标题
原位X射线检测器在工作光子能量处的增益校正
In situ X-ray area detector gain correction at an operating photon energy
论文作者
论文摘要
X射线区域探测器的增益校准是一个挑战，这是因为无法在梁线上运行的选定光子能量上产生X射线平坦场，这对检测器的增益行为有很大影响。提出了一种方法，其中计算出没有平面测量值的增益图。相反，使用无定形散射器的一系列快速散射测量来计算增益图。快速获得增益图的能力允许根据需要重新校准X射线检测器，而无需大量的时间或努力。发现所使用的梁线上的区域探测器，例如Pilatus 2M CDTE或VAREX XRD 4343CT，其增益略有稍微在数周的时间尺度上漂移，或暴露于高光子通量后，这表明需要更频繁地重新校准以获得检测器的增益。
Gain calibration of x-ray area detectors is a challenge due to the inability to generate an x-ray flat field at the selected photon energy that the beamline operates at, which has a strong influence on the detector's gain behavior. A method is presented in which a gain map is calculated without flat field measurements. Rather, a series of quick scattering measurements from an amorphous scatterer is used to calculate a gain map. The ability to rapidly obtain a gain map allows for a recalibration of an x-ray detector as needed without significant expenditure of either time or effort. Area detectors on the beamlines used, such as the Pilatus 2M CdTe or Varex XRD 4343CT, were found to have gains which drift slightly over timescales of several weeks or after exposure to high photon flux, suggesting the need to more frequently recalibrate for detector gain.
