Digital pulse-timing technique for the neutron detector array NEDA
Digital pulse-timing technique for the neutron detector array NEDA
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DOI：
10.1016/j.nima.2014.12.002
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发表时间：
2015-11
影响因子：
1.4
通讯作者：
V. Modamio;J. Valiente-Dobon;G. Jaworski;T. Hüyük;A. Triossi;J. Egea;A. Nitto;P. Söderström
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文献类型：
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作者：
V. Modamio;J. Valiente-Dobon;G. Jaworski;T. Hüyük;A. Triossi;J. Egea;A. Nitto;P. Söderström
一种新的数字脉冲定时算法已经开发出来并进行了测试，该算法将与未来的中子探测器阵列 NEDA 一起使用。通过采用数字采样电子器件和恒定分数鉴别器 (CFD) 算法来测量与圆柱形 5 英寸 x 5 英寸 BC501A 液体闪烁体探测器耦合的四个 5 英寸直径光电倍增管（XP4512、R4144、R11833-100 和 ET9390-kb）的时间分辨率。 CFD 算法的零交叉是通过三次样条插值获得的，该插值连续到二阶导数。该算法的性能在 500 MS/s 和 200 MS/s 的采样率下进行了研究。将数字电子设备获得的时间分辨率与标准模拟 CFD 获得的值进行比较。比较结果表明，对于所有测试的光电倍增管，500 MS/s 和 200 MS/s 下的模拟和数字测量的时间分辨率均在 15% 以内。
A new digital pulse-timing algorithm, to be used with the future neutron detector array NEDA, has been developed and tested. The time resolution of four 5 in. diameter photomultiplier tubes (XP4512, R4144, R11833-100, and ET9390-kb), coupled to a cylindrical 5 in. by 5 in. BC501A liquid scintillator detector was measured by employing digital sampling electronics and a constant fraction discriminator (CFD) algorithm. The zero crossing of the CFD algorithm was obtained with a cubic spline interpolation, which was continuous up to the second derivative. The performance of the algorithm was studied at sampling rates of 500 MS/s and 200 MS/s. The time resolution obtained with the digital electronics was compared to the values acquired with a standard analog CFD. The result of this comparison shows that the time resolution from the analog and the digital measurements at 500 MS/s and at 200 MS/s are within 15% for all the tested photomultiplier tubes.