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A fast neutron time-of-flight and scattering angle measuring system with online flight time correction

Journal Article · · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)
DOI:https://doi.org/10.1109/23.281516· OSTI ID:7300870
; ;  [1]
  1. Hahn-Meitner-Inst. Berlin GmbH, Berlin (Germany)
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The paper describes a microprocessor controlled VMEbus system for neutron scattering experiments at the new Berlin Experimental Reactor BER 2. The system measures the distribution of neutron time-of-flight by spatially distributed detectors (400 single detectors or a multi-detector array with 4,096 elements) and generates a two-dimensional histogram with 4 K time channels and 4 K detector position channels in a 32 MB memory. Several outstanding features are described in detail: (1) An online time-of-flight correction compensates different lengths of neutron flight paths, in order to obtain undistorted spectra if, e.g., a planar detector array is used. (2) The system is designed for very fast processing of the events detected, to allow high neutron counting rates of up to 500,000 neutrons/s in average and up to 2 [times] 10[sup 6] neutrons/s as peak rate. (3) To provide a maximum of flexibility for the user, the operation of the system is based on pre-calculated tables and parameters which allow a wide variety of system configurations to satisfy very different requirements of the experiments.

OSTI ID:
7300870
Journal Information:
IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 41:1 Pt2; ISSN 0018-9499; ISSN IETNAE
Country of Publication:
United States
Language:
English

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Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AQUEOUS HOMOGENEOUS REACTORS
BEAM PULSERS
BER-2 REACTOR
DATA ACQUISITION SYSTEMS
ENERGY RESOLUTION
FLUID FUELED REACTORS
HE-3 COUNTERS
HOMOGENEOUS REACTORS
INELASTIC SCATTERING
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
LIQUID HOMOGENEOUS REACTORS
MEASURING INSTRUMENTS
NEUTRON DETECTORS
NEUTRON SPECTROMETERS
POOL TYPE REACTORS
PROPORTIONAL COUNTERS
RADIATION DETECTORS
REACTORS
RESEARCH AND T
RESEARCH REACTORS
RESOLUTION
SCATTERING
SPECTROMETERS
TIME-OF-FLIGHT METHOD
WATER COOLED REACTORS
WATER MODERATED REACTORS