JASMI  Vol.3 No.3 , September 2013
A Design Configuration of an FPGA-Based Coincident Spectrometry System
ABSTRACT

In the past, most of popular coincidence spectrometers were normally based on traditional electronics techniques such as time to amplitude conversion or logic selecting coincidence unit. They were complicated and it is not convenient for us to use them. This paper deals with a new design of a contemporary coincidence spectrometer which is based on Field Programmable Gate Arrays (FPGA) devices via Digital Signal Processing (DSP) techniques with Hardware Description Language (VHDL). The outstanding advantage of DSP techniques and FPGA technology is capable of enhancement of the quality of the experimental measurements for nuclear radiation. The designed configuration of the traditional system was tested on the PCI 7811R board of National Instruments while the digital systems were establishing with FPGA devices. The purpose of this work is referring to the principle for construction of an FPGA-based system capable of replacing a conventional system. Therefore, a novel approach for in-house development of digital techniques is presented. The method for designing the system is utilization of slow-fast coincidence configurations with two HPGe detectors obtaining a pair of coincidence events, processing data in DSP algorithms. The significant and noticeable results are the operating frequency of 80 MHz and system timestamp window of approximately 10 ns.


Cite this paper
P. Khang, N. Dien, D. Lanh, N. Hai, P. Tuan, N. Hoa and N. Son, "A Design Configuration of an FPGA-Based Coincident Spectrometry System," Journal of Analytical Sciences, Methods and Instrumentation, Vol. 3 No. 3, 2013, pp. 158-162. doi: 10.4236/jasmi.2013.33019.
References
[1]   EG&G ORTEC Catalog, “Nuclear Instruments and Systems Catalogue,” 1987.

[2]   A. M. Hoogenboom, “A New Method in Gamma-Ray Spectroscopy: A Two Crystal Scintillation Spectrometer with Improved Resolution,” Nuclear Instruments, Vol. 3, No. 2, 1958, pp. 57-68. doi:10.1016/0369-643X(58)90092-6

[3]   W. R. Leo, “Techniques for Nuclear and Particle Physics Experiments,” Springer-Verlag, Berlin, Heidelberg, 1987.

[4]   N. N. Dien, V. H. Tan and P. D. Khang, “The Gamma-Gamma Coincidence Spectrometer for Research on Nuclear Structure at DNRI,” Proceedings of International Symposium on Instrumentation of Small and Medium Accelerators, Tsukuba, 1996, pp. 128-131.

[5]   P. D. Khang, N. X. Hai, V. H. Tan and N. N. Dien, “Gamma-Gamma Coincidence Spectrometer Setup for Neutron Activation Analysis and Nuclear Structure Studies,” Nuclear Instruments and Methods in Physics Research, Vol. 634, No. 1, 2011, pp. 47-51.

[6]   A. Kimura, Y. Toh, et al., “Development of a Data Acquisition System for a Multiple Gamma-Ray Detection Method,” AIP Conference Proceedings, Vol. 769, Melville, New York, 2005.

[7]   M. J. Koskelo, I. J. Koskelo and B. Sielaff, “Comparison of Analog and Digital Signal Processing Systems Using Pulse,” Nuclear Instruments and Methods in Physics Research, Vol. 422, No. 1-3, 1999, pp. 373-378.

[8]   J. M. Los Arcos, et al., “A New Digital Pulse Height Analysis Method for Radiation Spectroscopy,” Nuclear Instruments and Methods in Physics Research, Vol. 339, No. 1-2, 1994, pp. 99-101.

 
 
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