Study of time-domain digital pulse shaping algorithms for nuclear signals

Study of time-domain digital pulse shaping algorithms for nuclear signals 1 first-author 1 2 corresp Corresponding author. E-mail address: zhouwei@cdut.edu.cn Corresponding author. E-mail address: zhouwei@cdut.edu.cn zhouwei@cdut.edu.cn 3 1 1 1 College of Nuclear, Chengdu University of Technology, Chengdu 610059, China College of Nuclear, Chengdu University of Technology, Chengdu 610059, China State Key Laboratory of Coal Resources & Mine Safety, College of Mining Engineering, China University of Mining & Technology, Xuzhou 221116, China State Key Laboratory of Coal Resources & Mine Safety, College of Mining Engineering, China University of Mining & Technology, Xuzhou 221116, China Institute of Physics and Chemical, China Academy of Engineering Physics, Mianyang 621900, China Institute of Physics and Chemical, China Academy of Engineering Physics, Mianyang 621900, China With the development on high-speed integrated circuit, fast high resolution sampling ADC and digital signal processors are replacing analog shaping amplifier circuit. This paper firstly presents the numerical analysis and simulation on R-C shaping circuit model and C-R shaping circuit model. Mathematic models are established based on 1 st order digital differential method and Kirchhoff Current Law in time domain, and a simulation and error evaluation experiment on an ideal digital signal are carried out with Excel VBA. A digital shaping test for a semiconductor X-ray detector in real time is also presented. Then a numerical analysis for Sallen-Key (S-K) low-pass filter circuit model is implemented based on the analysis of digital R-C and digital C-R shaping methods. By applying the 2 nd order non-homogeneous differential equation, the authors implement a digital Gaussian filter model for a standard exponential-decaying signal and a nuclear pulse signal. Finally, computer simulations and experimental tests are carried out and the results show the possibility of the digital pulse processing algorithms. R-C shaping C-R shaping Nuclear pulse Digital S-K filter Digital Gaussian filter References Wang J J , Fan T M , Qian Y G . Nuclear electronics . Beijing : Atomic Energy Press , 1983 (in Chinese) . Nuclear electronics Wang Z Y , Lou B Q , Zhu J J , et al . Principle of Nuclear Electronics . Beijing : Atomic Energy Press , 1989 (in Chinese) . Principle of Nuclear Electronics Hu X J . Circuit Analysis . Beijing : Higher Education Press , 2001 (in Chinese) . Circuit Analysis Wang B X . Signal and System . Harbin : Harbin Institute of Technology Press , 2003 (in Chinese) . Signal and System Jordanov V T , Knoll G F . Nucl Instrum Methods Phys Res Sec A , 1994 , 345 : 337 - 345 . Nucl Instrum Methods Phys Res Sec A Jordanov V T , Knoll G F , Huber A C . Nucl Instrum Methods Phys Res Sec A , 1994 , 353 : 261 - 264 . Nucl Instrum Methods Phys Res Sec A Jordanov V T , Knoll G F . IEEE Transact Nucl sci , 1995 , 42 : 683 - 687 . IEEE Transact Nucl sci Jordanov V T , Pantazis J A , Huber A C . Nucl Instrum Methods Phys Res Sec A , 1996 , 380 : 353 - 357 . Nucl Instrum Methods Phys Res Sec A Jordanov V T . Nucl Instrum Methods Phys Res Sec A , 2003 , 505 : 347 - 351 . Nucl Instrum Methods Phys Res Sec A Chen S G , Ji S Y , Liu W S , et al . Acta Phys Sinica , 2008 , 57 : 2882 - 2887 (in Chinese) . Acta Phys Sinica Chen S G , Ji S Y , Liu W S , et al . Acta Phys Sinica , 2009 , 58 : 3041 - 3046 (in Chinese) . Acta Phys Sinica Li D C , Yang L , Tian Y , et al . Nucl Electron Detection Technol , 2008 , 28 : 563 - 566 (in Chinese) . Nucl Electron Detection Technol Li D C , Yang L , Tian Y , et al . J Lanzhou University (Nat Sci) , 2007 , 43 : 110 - 113 (in Chinese) . J Lanzhou University (Nat Sci) Zhou J B , Zhou W , Fang F , et al . 2011 Proceedings of the 10th International Conference on Electronic Measurement & Instruments , 2011 , 4 : 163 - 165 . 10.13538/j.1001-8042/nst.23.150-155 Supported by Shanghai Synchrotron Radiation Facility project 2011-11-21 2012-06-20 2021-01-19 2012 Nuclear Science and Techniques 03 23