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Nuclear Science, IEEE Transactions on

Issue 5 • Date Oct. 1969

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  • Table of contents

    Publication Year: 1969 , Page(s): c1
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  • IEEE Nuclear Science Group

    Publication Year: 1969 , Page(s): c2
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  • The Nucleus

    Publication Year: 1969 , Page(s): 1
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  • An Analogue-to-Digital Converter Employing Recycled Successive Approximations

    Publication Year: 1969 , Page(s): 3 - 9
    Cited by:  Papers (1)
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    The successive approximation technique is faster than most other methods of analogue-to-digital conversion. The main drawback is that it normally uses a multiplicity of high precision components. This paper describes a method in which the signal is recycled through the same conversion stage by using sample and hold circuits. View full abstract»

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  • Improvement of Sliding-Scale Analog-to-Digital Converters through Weighted Averaging

    Publication Year: 1969 , Page(s): 10 - 16
    Cited by:  Papers (1)
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    Several figures of merit for characterizing an analog-to-digital converter are considered. It is shown that the sliding scale method of improving through averaging the performance of a converter can be made more effective by introducing variable statistical weights in the averaging procedure. It is found that a parabolic weighting function is the optimum for the differential linearity, if the channel boundaries are independently random distributed with equal variance. Moreover it is shown, through a computer simulation, that this weighting function is more convenient than a rectangular one to improve also a local differential linearity, while it is equivalent as far as correction of channel centroid errors is concerned. A triangular weighing function is found to be slightly worse than the parabolic one as far as overall differential linearity is concerned but somewhat better from the point of view of local behaviour. View full abstract»

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  • 1/|f| Noise in Physical Measurements

    Publication Year: 1969 , Page(s): 17 - 35
    Cited by:  Papers (14)
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    The purpose of this paper is to provide an insight into low frequency divergent noises with spectral density |f|¿, where ¿ ¿ -1, and into their effect on physical measurements, with special reference to 1/|f| noise. This class of noise is widespread in nature, and it presents unique limitations to the measurement accuracy. In an attempt to present a picture of this class of noise with regard to the measurements of observable physical quantities, the questions about generation of noise, its divergence, correlation properties and measurements of variance are discussed. A statistical model for generation of low frequency divergent noises is used to consider the divergence problem in both the frequency and time domain. It is shown that 1/|f| noise is "weakly divergent," and that power limitation presents no reason to impose a low frequency limit within time intervals observable in nature. Correlation properties are discussed in terms of the time-dependent correlation function, using an ideal impulse response which generates low frequency noise from white noise. Two general models for generation of 1/|f| noise are summarized and discussed. Generation of 1/|f| noise from white noise over a limited frequency range by distributed and lumped-parameter filters is described. It is shown that the variance (i.e. mean square noise) is determined by the frequency limits of the observation method. View full abstract»

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  • State of Art in Multichannel Pulse Data Analysis

    Publication Year: 1969 , Page(s): 36 - 57
    Cited by:  Patents (2)
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  • System Requirements for High-Resolution Gamma-Ray Spectrometry at High Counting Rates

    Publication Year: 1969 , Page(s): 58 - 67
    Cited by:  Papers (1)
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    The full potential of high-resolution gamma-ray spectrometers has been severely hampered by degradation in the quality of the pulse-height spectrum at high input data rates. Over the past year or two considerable effort has been expended in the examination of this problem. This paper will briefly review the nature of these instrumental difficulties, define realistic experimental requirements, and illustrate state-of-the-art solutions to these problems. A DC-coupled system which has been developed in our laboratory for high-rate applications will be described and performance presented. View full abstract»

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  • Minimum-Noise Filters with Good Low-Frequency Rejection

    Publication Year: 1969 , Page(s): 68 - 75
    Cited by:  Papers (9)
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    A nuclear pulse spectrometer should have both low noise and minimal sensitivity to slow disturbing signals, e.g. base-line fluctuations due to long CR-couplings. A bipolar filter weight-function (or step response) with area balance is advantageous for the latter, but generally involves increased noise and/or resolving time. This paper derives the optimum area-balanced waveform giving least noise for a defined overall width. Optimum waveforms are illustrated and the noise/signal performance is compared with that of the finite-width unipolar cusp and also with several practical bipolar systems in common use. View full abstract»

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  • The CAMAC System of Modular Instrumentation

    Publication Year: 1969 , Page(s): 76 - 80
    Cited by:  Papers (3)
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  • Methods of Reducing the Number of Binary Digits Required to Convey Random Counting-Rate Information

    Publication Year: 1969 , Page(s): 81 - 86
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    The digits resulting from counting random events can be encoded in ways which reduce the communication bandwidth required to transmit them to a remote point. A number of ways of doing this have already been reviewed; two further methods are now presented which appear to have significant advantages. View full abstract»

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  • Future Trends in Physical Measurements and Nuclear Instrumentation

    Publication Year: 1969 , Page(s): 87 - 89
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    This paper is a free syntesis of a discussion held at Ispra on May 9, 1969 with the purpose to stimulate the people to look forward in order to catch, if possible, what the future of nuclear electronics will be. The present situation of the technique is analyzed, some criticism is made and some conclusion with possible prediction on the evolution are exposed. View full abstract»

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  • Event Priority Instrumentation System for Nuclear Experiments on Scientific Satellites

    Publication Year: 1969 , Page(s): 90 - 96
    Cited by:  Papers (1)
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    The number of information bits per unit time, or data rate, which can be telemetered back to earth from a scientific satellite is limited by restrictions on weight, volume and power. Thus, each experimenter (generally one of many) is allotted a very limited data rate capability. In nuclear experiments, where a wide variety of events may occur per unit time, use of this rate capability may be optimized by selection of events on a priority basis. Described here is an event priority instrumentation system developed for use in scientific satellites. The system allows for the selection of the highest priority event occurring during a telemetry sequence. Also, provision is made for periodically changing the order of priority. All circuitry was designed and developed to minimize weight, volume and power drain and to maintain stable characteristics while unattended for periods as long as one year. The operating temperature range is -20°C to 60°C. View full abstract»

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  • Neutron Damage to Silicon Solar Cells

    Publication Year: 1969 , Page(s): 97 - 105
    Cited by:  Papers (7)
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    Silicon solar cells of the n/p 5 to 10 ¿-cm type have been irradiated with neutron fluences from 5.2 x 109 to 1.5 x 1013 n/cm2 using a TRIGA reactor. Current-voltage characteristics, spectral response, and diffusion length measurements have been made and the results interrelated. Agreement with theory is good. Diffusion length depends upon injection level in a manner similar to that for proton irradiation. View full abstract»

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  • Effects of 600 MeV Protons on M.O.S. Transistors

    Publication Year: 1969 , Page(s): 106 - 108
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    This paper deals with a brief report of the irradiation of M.O.S.T. at C.E.R.N., using 600 MeV protons. The behavior of two fundamental parameters : the treshold voltage and the mobility of the holes in the channel were studied using p-channel transistors. View full abstract»

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  • The Myth of the Peaceful Atom

    Publication Year: 1969 , Page(s): 109 - 110
    Cited by:  Papers (1)
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  • Contributors

    Publication Year: 1969 , Page(s): 111 - 114
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  • [Advertisement]

    Publication Year: 1969 , Page(s): 116
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  • Information for authors

    Publication Year: 1969 , Page(s): 116a
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  • Affiliate Plan of the IEEE Nuclear Science Group

    Publication Year: 1969 , Page(s): 116-b
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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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