Real time trapezoidal shaping algorithm at high count rates

HUANG Yuyan; GONG Hui; LI Jianmin

doi:10.16511/j.cnki.qhdxxb.2017.22.031

PDF(1123 KB)

Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (5) : 521-524. DOI: 10.16511/j.cnki.qhdxxb.2017.22.031

ENGINEERING PHYSICS

Real time trapezoidal shaping algorithm at high count rates

{{article.zuoZhe_EN}}

Author information +

History +

Abstract

A trapezoidal shaping algorithm was developed for common exponential nuclear signals and the pile-up effect at high count rate was studied. Deconvolution was used for time-of-arrival estimates to effectively improve the ability to recognize pile-up pulses and reduce the pile-up effect on the energy resolution. A complete pulse height analyzer was built in LabVIEW to realize real time trapezoidal shaping, pile-up recognition and spectrum construction in the field-programmable gate array (FPGA). Measurements with an X-ray diffractometer with a silicon drift detector (SDD) give a 2.46% energy resolution at a count rate of 1.8×10⁵ cps (counts per second).

Key words

real time trapezoidal shaping / high count rate / pile-up effect / X-ray diffractometer

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

HUANG Yuyan, GONG Hui, LI Jianmin. Real time trapezoidal shaping algorithm at high count rates[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(5): 521-524 https://doi.org/10.16511/j.cnki.qhdxxb.2017.22.031

References

[1] Radeka V. Trapezoidal filtering of signals from large germanium detectors at high rates [J]. IEEE Transactions on Nuclear Science, 1972, 99(3): 525-539. [2] 肖无云, 魏义祥, 艾宪芸. 数字化多道脉冲幅度分析中的梯形成形算法[J]. 清华大学学报: 自然科学版, 2005, 45(6): 810-812.XIAO Wuyun, WEI Yixiang, AI Xianyun. Trapezoidal shaping algorithm for digital multi-channel pulse height analysis [J]. Journal of Tsinghua University: Science and Technology, 2005, 45(6): 810-812. (in Chinese) [3] Bolic M, Drndarevic V. Digital gamma-ray spectroscopy based on FPGA technology [J]. Nuclear Instruments & Methods in Physics Research, 2002, 482(3): 761-766. [4] Bolic M, Drndarevic V. Processing architecture for high count rate spectrometry with NaI(Tl) detector [C]//IEEE Instrumentation and Measurement Technology Conference Record. Victoria, BC, Canada: IEEE Press, 2008: 274-278. [5] Cano-Ott D, Tain J L, Gadea A, et al. Pulse pileup correction of large NaI(Tl) total absorption spectra using the true pulse shape [J]. Nuclear Instruments & Methods in Physics Research, 1999, 430(2): 488-497. [6] Wong W H, Li H. A scintillation detector signal processing technique with active pileup prevention for extending scintillation count rates [J]. IEEE Transactions on Nuclear Science, 1998, 45(3): 838-842. [7] Haselman M D, Pasko J, Hauck S, et al. FPGA-based pulse pile-up correction with energy and timing recovery [J]. IEEE Transactions on Nuclear Science, 2012, 59(5):1823-1830. [8] Ehrenberg J E, Ewart T E, Morris R D. Signal-processing techniques for resolving individual pulses in a multipath signal [J]. Journal of the Acoustical Society of America, 1978, 63(6): 1861-1865. [9] Bolic M, Drndarevic V, Gueaieb W. Pileup correction algorithms for very-high-count-rate gamma-ray spectrometry with NaI(Tl) detectors [J]. IEEE Transactions on Instrumentation & Measurement, 2010, 59(1): 122-130. [10] LIU Zhenzhou, CHEN Jinxiang. A Monte Carlo based technique for analysing gamma-ray spectra [J]. Measurement Science & Technology, 2008, 19(8), 085102. [11] Meng L J, Ramsden D. An inter-comparison of three spectral-deconvolution algorithms for gamma-ray spectroscopy [J]. IEEE Transactions on Nuclear Science, 2000, 47(4): 1329-1336. [12] Imperiale C, Imperiale A. On nuclear spectrometry pulses digital shaping and processing [J]. Measurement, 2001, 30(1): 49-73. [13] 陈新光, 李翔宇, 孙义和. 粒子探测器读出电路数字滤波器设计[J]. 电子产品世界, 2010, 17(10): 29-31.CHEN Xinguang, LI Xiangyu, SUN Yihe. Particle detector readout circuits digital filter design [J]. Electronic Engineering & Product World, 2010, 17(10): 29-31. (in Chinese)