论文标题
使用顺序反卷积的复合频域多路复用检测器脉冲的恢复
Recovery of coincident frequency domain multiplexed detector pulses using sequential deconvolution
论文作者
论文摘要
将辐射检测器信号多路复用到单个通道中大大减少了对大量数字数字通道的需求，从而降低了数据采集系统的成本和功耗。我们先前使用原型系统通过卷积证明了频域的多路复用，该原型系统将两个EJ-309有机闪光灯信号多路复用到一个通道中。将每个检测器脉冲转换为阻尼的正弦曲线，然后将其组合到单个通道中。将组合信号数字化，并通过反卷积从阻尼的正弦体中回收原始的检测器信号。在本文中，我们证明了通过新的顺序反卷积方法在同一数字化记录中到达的多个检测器信号的恢复。当两个检测器在相同的数字化记录中产生信号，并且它们的脉冲不会随时间重叠时，我们发现电荷，到达时间和粒子类型可以准确地估计第一个脉冲，但是第二个脉冲在估计的电荷和到达时间的精度中表现出很大的降解。当脉冲在时间上重叠时，我们在理论上和实验上都证明了与第二个脉冲不重叠的第一个脉冲的一部分可以准确地恢复，因此可以相当准确地估计第一个脉冲的到达时间和振幅，但不能相当准确地估计，但是电荷或粒子类型。当两个脉冲重叠时，这些数量均无法准确地估计第二个脉冲。
Multiplexing of radiation detector signals into a single channel significantly reduces the need for a large number of digitizer channels, which reduces the cost and the power consumption of a data acquisition system. We previously demonstrated frequency domain multiplexing by convolution using a prototype system that multiplexed two EJ-309 organic scintillators signals into a single channel. Each detector pulse was converted to a damped sinusoid which was then combined into a single channel. The combined signal was digitized and the original detector signal was recovered from the damped sinusoid by deconvolution. In this paper, we demonstrate the recovery of multiple detector signals that arrive during the same digitized record via a new sequential deconvolution method. When two detectors produce signals in the same digitized record and their pulses do not overlap in time, we found that the charge, arrival time, and particle type can be estimated fairly precisely for the first pulse, but the second pulse exhibits substantial degradation in the precision of the estimated charge and arrival time. When the pulses overlap in time, we demonstrate both theoretically and experimentally that the part of the first pulse that does not overlap with the second can be recovered accurately, so the arrival time and amplitude of the first pulse can be estimated fairly precisely, but not the charge or particle type. None of these quantities can be estimated precisely for the second pulse when the two pulses overlap.
