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      Development of gamma spectroscopy employing NaI(Tl) detector 3 inch × 3 inch and readout electronic of flash-ADC/FPGA-based technology

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      a, , b , 3 , 4
      Kerntechnik
      Carl Hanser Verlag

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          Abstract

          In this article the development of a gamma spectroscopy system is described using a scintillation detector NaI(Tl) of 3 inch × 3 inch. The readout electronic for the spectroscopy is built from the fast analog-digital conversion of Flash Analog-Digital Converter (Flash-ADC) 250 MHz – 8 bits resolution, and the embedded Field-Programmable Gate Array (FPGA) technology. The embedded VHSIC Hardware Description Language (VHDL) code for FPGA is built in such a way that it works as a multi channel analyser (MCA) with 4096 Digital Charge Integration (DCI) channels. A pulse generator with frequency varying from Hz up to 12 kHz is used to evaluate the time response of the system. Two standard radioisotope sources of 133Ba and 152Eu with multi gamma energies ranging from several tens keV to MeV are used to evaluate the linearity and energy resolution of the system.

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          Most cited references3

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          Cosmic ray measurements employing plastic scintillation detectors and Flash-ADC/FPGA-Based readout system

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            Cosmic ray angular distribution employing plastic scintillation detectors and flash-ADC/FPGA-based readout systems

            It is known that secondary cosmic rays are high energetic particles which are products of shower particles, when primary cosmic rays from outer space hit the atmosphere molecules. Many studies of cosmic rays show that cosmic flux depends on the depth of atmosphere. At ground level, most secondary cosmic rays are muons, a type of charged particle, and have angular dependence. The purpose of this article was to develop the telescope with two plastic scintillation detectors to investigate the angular distribution of cosmic rays at ground level. Directions of investigation were carried out vertical, 45-degree oblique and horizontal directions with respect to earth surface, approximately from North to South. Electronic readout system was developed from Flash Analog Digital Converter (Flash-ADC) of 8 bits-250Ms/sec, and Embedded Field Programmable Gate Array (FPGA)-based trigger. LabVIEW TM interface was written for controlling trigger system and taking data. For each direction measurement, the deposited energy spectra in the scintillators were obtained. The interest of cosmic-ray events was analyzed for counting. Angular distribution was obtained quantitatively. The experiment has been done at University of Science-HCMC.
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              High-speed FPGA-based pulse-height analyzer for high resolution X-ray spectroscopy

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                Author and article information

                Journal
                kt
                Kerntechnik
                Carl Hanser Verlag
                0932-3902
                2195-8580
                28 April 2015
                : 80
                : 2
                : 180-183
                Affiliations
                a Institute of Nuclear Physics, Nuclear Engineering Lab, Faculty of Physics and Engineering Physics, University of Science, HCMC-National University, 227 Nguyen Van Cu, Ward 4, District 5, Hochiminh City, Vietnam
                b Division of Nuclear Physics, Faculty of Applied Sciences, Ton Duc Thang University, Tan Phong Ward, District 7, Ho Chi Minh City, Vietnam
                3 Institute of Nuclear Physics, Faculty of Physics and Engineering Physics, University of Science, HCMC-National University, 227 Nguyen Van Cu, Ward 4, District 5, Hochiminh City, Vietnam. E-mail: nqhung@ 123456hcmus.edu.vn
                4 Department of Physics, Graduate School of Science, Osaka University, 1-1 Yamadaoka, Suita, Osaka 565-0871, Japan
                Article
                KT110491
                10.3139/124.110491
                e78a2e00-e435-41c2-b666-4022c20ed308
                © 2015, Carl Hanser Verlag, München
                History
                : 25 December 2014
                Page count
                References: 11, Pages: 4
                Categories
                Technical Contributions/Fachbeiträge

                Materials technology,Materials for energy,Nuclear physics
                Materials technology, Materials for energy, Nuclear physics

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