The preliminary choice of design parameters for neutron choppers
George S. Stanford, Argonne National Laboratory. Reactor Engineering Division, U.S. Atomic Energy Commission
Argonne National Laboratory, 1961 - Neutron counters - 18 pages
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adjacent runs ae and ax AE/E)max approximation Area of spectrometer assumed burst half-width burst width bursts per revolution bursts per second channel width CHOPPER RUNS CHOPPERS by George constant counting rate achieved cutoff velocity vc defined by Eq detector thickness determining the optimum Diverging-Slit Chopper energy decade energy region exit aperture EXTENDED TIME-OF-FLIGHT REGION flight path fraction full width Gaussian given chopper speed given rotor large as possible Maximum permissible energy needed to cover neutron burst neutron chopper NEUTRON SPECTROMETER number of bursts Number of Runs number of slits peripheral velocity permissible energy resolution rate per channel rate per unit region per run resolution function resolution requirements rotor diameter rotor speed runs are needed runs per energy single run slit defines slit design slit width slowest neutron solid angle SPATIAL ASPECTS SPECTROMETER ENTRANCE APERTURE Switzerland time-of-flight interval total running trons unit reciprocal speed width to burst word resolution