Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (6): 138 doi: 10.1007/s41365-016-0137-z

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

A new digital pulse processing method for 2πα and 2πβ emitter measurement

Zheng Tu Ke-Zhu Song 1  Ming Zhang 2  Zhi-Jie Yang 2  Zhi-Guo Ding Hong-Wei Yu Jun-Cheng Liang Hao-Ran Liu 2   

  1. 1 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
    2 National Institute of Metrology, 18 North Third Ring East Rd., Beijing 100029, China
  • Contact: Ke-Zhu Song E-mail:skz@ustc.edu.cn
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Zheng Tu, Ke-Zhu Song, Ming Zhang, Zhi-Jie Yang, Zhi-Guo Ding, Hong-Wei Yu, Jun-Cheng Liang, Hao-Ran Liu. A new digital pulse processing method for 2πα and 2πβ emitter measurement.Nuclear Science and Techniques, 2016, 27(6): 138     doi: 10.1007/s41365-016-0137-z
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Abstract:

Digital pulse processing has developed rapidly during recent years. Moreover, it has been widely applied in many fields. In this study, we introduce a digital pulse processing method for 2πα and 2πβ emitter measurement. Our digital pulse processing method for 2πα and 2πβ emitter measurement is comprised of a field-programmable gate-array-based acquisition card and a pulse-height analysis routine. We established two channels (one for the α emitter and one for the β emitter) on an acquisition board using an analog-to-digital converter with a 16-bit resolution at a speed of 100 million samples per second. In this study, we used captured and stored data to analyze emission rate counts and spectrums. The method we established takes into account noise cancelation, dead-time correction, background subtraction, and zero-energy extrapolation. We carefully designed control procedures in order to simplify pulse-width fitting and threshold-level setting. We transmitted data and commands through a universal serial bus between the acquisition board and the computer. The results of our tests prove that our method performs well in pulse reconstruction fidelity and amplitude measurement accuracy. Compared with the current standard method for measuring 2πα and 2πβ emission rates, our system demonstrates excellent precision in emission rate counting.

Key words: Digital pulse processing, α and β emitter measurement, FPGA