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IEEE Transactions on Nuclear Science

Issue 4 • Date Aug 1989

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Displaying Results 1 - 7 of 7
  • An accelerator operator's companion for the McMaster University Model FN tandem accelerator

    Publication Year: 1989, Page(s):1409 - 1417
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    A prototype accelerator operator's companion was developed to investigate the feasibility of automating the operation of the McMaster University Model FN Van De Graaff accelerator. Its purpose is to provide the accelerator staff with a working model with which they can experiment and which would motivate discussions to further pinpoint their needs. Initial needs and goals were established at the o... View full abstract»

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  • A high-speed low-power spectrum accumulator using dual-port RAM and state machine control

    Publication Year: 1989, Page(s):1396 - 1403
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    A high-speed spectrum accumulator circuit intended for use with a time-of-flight mass spectrometer is described. Advantages of this design include high-speed data acquisition (>400 kHz periodic, 2.5-μs pulse-pair resolution), high resolution (256 channels, expandible to 1024), low power (~2 W), and circuit simplicity. This performance is achieved with an optimum combination of an 8-b flash a... View full abstract»

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  • Optimum beam duty cycle for coincidence experiments

    Publication Year: 1989, Page(s):1407 - 1408
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    It is argued that continuous beam is commonly thought to be ideal for a coincidence experiment because it minimizes the false coincidence rate. A false coincidence rate up to a factor of two lower can be obtained (for fixed average current) by a pulsed beam with relatively short pulses separated by the resolution time of the detector. The micropulse structure of the beam is discussed. Most RF acce... View full abstract»

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  • Pneumatic fast-closing valve for synchrotron radiation beam lines at the photon factory

    Publication Year: 1989, Page(s):1391 - 1395
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A fast-closing valve system has been designed and fabricated in order to protect the vacuum of the synchrotron radiation beam line and that of the 2.5 GeV storage ring from a sudden vacuum failure at the downstream end of the beam line. Upon the detection of a failure the valve closes within 11.9 ms by pneumatic pressure on a drive piston in a cylinder. Within the last 3.7 ms of the closing time t... View full abstract»

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  • Notes concerning steady-state optimization of ion accelerators

    Publication Year: 1989, Page(s):1404 - 1406
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The general opinion about automatic control of ion accelerators is described, explaining the differences between steady-state and dynamic models of a control system. Three steps describing a steady-state model are given. A new method for solving a set of nonlinear equations is introduced, and a method for searching for the optimal operating point of an ion accelerator is explained View full abstract»

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  • Gain margin and phase margin analysis of a nuclear reactor control system with multiple transport lags

    Publication Year: 1989, Page(s):1418 - 1425
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A method for finding the boundaries of the constant gain margin and phase margin of control systems with transport lags and adjustable parameters is presented. The systems are first modified by adding a gain-phase margin tester, then the characteristic equations are formulated, and finally the stability equations are used to find the boundaries of the constant gain margin and phase margin. The mai... View full abstract»

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  • Effects of fast neutron radiation on polypropylene

    Publication Year: 1989, Page(s):1386 - 1390
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Capacitor-grade polypropylene films were irradiated in a 2-MW thermal nuclear reactor and exposed to fast neutron radiation at a flux rate of 2.6×1012 neutron/cm2 s and gamma radiation at a level of 107 rad/h. The postirradiation effects on changes in the electrical and chemical properties of the films were studied for irradiation times up to 10 h. The electr... View full abstract»

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Aims & Scope

IEEE Transactions on Nuclear Science focuses on all aspects of the theory and applications of nuclear science and engineering, including instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.

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