A scintillation detector signal processing technique with active pileup prevention for extending scintillation count rates
A scintillation detector signal processing technique with active pileup prevention for extending scintillation count rates
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DOI：
10.1109/nssmic.1997.672555
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发表时间：
1997-11
期刊：
影响因子：
--
通讯作者：
W. Wong;Hondi Li
中科院分区：
文献类型：
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作者：
W. Wong;Hondi Li
提出了一种新的闪烁探测器信号处理方法。该方法具有主动堆积防止，其显著增加闪烁计数的最大计数率能力。它动态地调整闪烁光的积分，并简单（但精确）消除所有先前多次堆积的残余光。原型电路表明，在正常计数率下，其能量分辨率与传统的脉冲成形（或固定积分）方法一样好，但最大计数率提高了10倍或更多。在NaI（Tl）的2百万计数/秒时，获得的真实计数是延迟线削波的3倍。研究了高达350万/秒的脉冲高度谱。
A new method for processing the signal from a scintillation detectors is proposed. This method has an active pileup prevention which significantly increases the maximum count-rate capability of scintillation counting. It dynamically adjusts the integration of scintillation light together with a simple (but exact) cancellation of the remnant light from all previous multiple pileups. A prototype circuit demonstrated that at normal count rates, its energy resolution is as good as that of the traditional pulse shaping (or the fixed integration) method, but, the maximum count rates has been increased by 10 times or more. At 2 million counts/sec for NaI(Tl), the true counts acquired is 3 times more than delay-line clipping. Pulse height spectra up to 3.5 million/sec was studied.