15 research outputs found

    Status Report of Neutral Kaon photo-production study using Neutral Kaon Spectrometer 2 (NKS2) at LNS-Tohoku(I. Nuclear Physics)

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    The approach described in this paper uses an array of Field Programmable Gate Array (FPGA) devices to implement a fault tolerant hardware system that can be compared to the running of fault tolerant software on a traditional processor. Fault tolerance is achieved is achieved by using FPGA with on the fly partial programmability feature. Major considerations while mapping to the FPGA includes the size of the area to be mapped and communication issues related to their communication. Area size selection is compared to the page size selection in Operating System Design. Communication issues between modules are compared to the software engineering paradigms dealing with module coupling, fan-in, fan-out and cohesiveness. Finally, the overhead associated with the downloading of the reconfiguration files is discussed

    Comparison of the ^<40>Ca (e, e\u27p) Cross Section at Low Momentum Transfer Region with Relativistic Calculations(I. Nuclear Physics)

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    Both theoretical calculations using the spectroscopic factor obtained in the parallel and constant (ω, q) kinematics. overestimate the experimental cross section, about factors 2 or 1.4, respectively. The (e, e\u27p) experiment at the low momentum transfer in ^C, ^O and ^Ca show some important contributions is missing in the theoretical approach. The authors would like to thank C. Giusti and A. Meucci for their relativistic calculations. They also thank the accelerator group, the computer group and Mr. Matsuda for their assistance to the experiment. This work has been supported by Grant-in-Aid for Scientific Research (KAKENHI) (No.14540239, No.17540229) from Japan Society for the Promotion of Science (JSPS)
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