| ENGINEERING PHYSICS |
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Real time trapezoidal shaping algorithm at high count rates |
| HUANG Yuyan, GONG Hui, LI Jianmin |
| Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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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).
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| Keywords
real time trapezoidal shaping
high count rate
pile-up effect
X-ray diffractometer
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Issue Date: 15 May 2017
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2017,
Vol. 57
