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Author Ward, C. B. ♦ York, C. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTS AND INSTRUMENTATION ♦ ALKALI METALS ♦ ATOMIC MODELS ♦ ATOMS ♦ BROMINE ♦ CAPTURE ♦ CHLORINE ♦ CIRCUITS ♦ CONFIGURATION ♦ CROSS SECTIONS ♦ ELECTRIC POTENTIAL ♦ ELECTRONICS ♦ ELECTRONS ♦ EMISSION ♦ ENERGY ♦ ENERGY LEVELS ♦ ENERGY RANGE ♦ EQUATIONS ♦ EXCITATION ♦ FREQUENCY ♦ GASES ♦ HALIDES ♦ HALOGENS ♦ HEAT TREATMENTS ♦ IODINE ♦ IONIZATION ♦ LIGHT ♦ MEASURED VALUES ♦ PHOTOELECTRIC EFFECT ♦ PRODUCTION ♦ PULSE ANALYZERS ♦ PULSES ♦ QUANTUM MECHANICS ♦ RADIATIONS ♦ SEMICONDUCTORS ♦ SPECTRA ♦ SPECTROSCOPY ♦ SPIN ♦ THRESHOLD ENERGY ♦ TUNNEL EFFECT ♦ VAPORS
Abstract built employing tunnel diodes. The discriminator accepts negative pulses from 0.5 to 10.0 v in height, with rise times from 0.5 to 20 nsec and durations from 5 to 100 nsec. The threshold voltage for discrimination is set in terms of a calibrated potentiometer on the front panel of the circuit. mv over the entire range of threshold settings, and the maximum time variation in the leading edge of the output pulse as a function of the excess above threshold for the input is 10 nsec. Two output pulses are provided: one is a -5v pulse into 50 ohms, with a rise time of 3 nsec and duration of 30 nsec; the second is a +8v pulse with 10 nsec rise time and 100 nsec duration to drive a scaling circuit directly. Although used in a 50 ohm counting system, modifications of this circuit for use with higher impedance systems are described. (auth)
Educational Use Research
Learning Resource Type Article
Publisher Date 1963-06-01
Journal Nucl. Instr. Methods
Volume Number 23
Organization Univ. of California, Los Angeles


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