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Target optimization for a 10-MeV E-beam neutron converter

Nuclear Science and Techniques 2010年第2期21卷 69-71页

作者： TABBAKH Farshid khalafi hossein Institute of Nuclear Science and Technology Irradiation and Application Research School Atomic Energy Organization of Iran Tehran Iran Institute of Nuclear Science and Technology Atomic Energy Organization of Iran Tehran *** Iran

Accelerator-based target design and optimization is an approach for neutron generation. The target plays an important role for a neutron source on an electron accelerator. For optimizing a neutron source using 10 MeV electron beams of Rhodotron-TT200, Pb, Ta, or W alloys with Be were calculated as photo-neutron converter. The neutron yield, flux and energy were simulated using the MCNPX code. The results indicate that a 10 MeV electron beam is capable of producing high-intensity neutron flux of 1013n·cm–2·s–1 with average energy of 0.8 MeV.

关键词：优化目标电子束中子源电子加速器中子通量平均能量生成方法中子产额

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A Flexible Multichannel Digital Random Pulse Generator Based on FPGA

引用

World Journal of Nuclear Science and Technology 2013年第4期3卷 109-116页

作者： Mohammad Arkani hossein khalafi Naser Vosoughi Department of Energy Engineering Sharif University of Technology Tehran Iran Physics Department Amir-Kabir University of Technology Tehran Iran Radiation Application Research School Nuclear Science & Technology Research Institute (NSRTI) Atomic Energy Organization of Iran (AEOI) Tehran Iran Radiation Application Research School Nuclear Science & Technology Research Institute (NSRTI) Atomic Energy Organization of Iran (AEOI) Tehran Iran

The present paper describes a multichannel digital random pulse generator implemented in a 65-nm FPGA device. The random time interval generation is based on inverse transformation method. The output pulse generation rate, pulse width and the probability distribution function (PDF) of each channel might be individually selected by the computer through a USB cable connection. Statistical properties of the output channels can be adjusted and recorded in a fully dynamic flexible manner. The Poisson and uniform PDFs were tested and implemented for up to eight different channels in experiment, however, the implementation of any arbitrary PDF is possible by programming capability of the device as well. Detailed experimental results are expressed in the manuscript. The proposed equipment makes it possible to verify the complicated multichannel detection systems without having the radioactive experimental tests. This is a low cost instrumentation due to the FPGA-based construction.

关键词： Field Programmable Gate Array (FPGA) Random Pulse Generator Probability Distribution Function

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