梯形成形算法中成形参数与成形脉冲波形关系研究

在梯形成形算法理论基础上,利用模拟和实测核脉冲信号研究了梯形成形算法中衰减时间常数(τ_(trap))、达峰时间(n_a)与成形脉冲波形、滤波效果的关系,以及nb在分离堆积脉冲时的取值选择。研究表明,当且仅当τ_(trap)等于输入信号衰减时间常数时,成形脉冲对称;n_a值越大,滤波效果越好,脉冲宽度增加;n_b小于两个核脉冲信号发生的时间间隔时,采用梯形成形算法可分离堆积脉冲。

Study on the Relationship Between the Shaping Parameters of Trapezoidal Pulse Shaping Algorithm and the Trapezoidal Pulse Shape

By using the simulated nuclear pulse signals and the measured ones , the relationship between the de-cay time constant of the algorithm (τtrap ) and the trapezoidal pulse shape was studied , and the peaking time of the trapezoidal pulse (na) was discussed with the filtering performance .Also, the law of nb selection was pro-duced for pile-up pulse separation .The results suggest that only the shaping parameter τtrap equals to the decay time constant of input signal can the shaped pulse be symmetry .Besides, the filtering performs better as n a in-creases and the pile -up pulse can be separated as long as the trapezoidal pulse width is less that the interval time of the two nuclear pulse signals .