100-CHANNEL TIME-OF-FLIGHT ANALYZER FOR A SLOW-NEUTRON MECHANICAL CHOPPER

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Nukleonika (Poland)

OSTI ID:4162597

Sawicki, A

Construction of the 100-channel analyzer is described. The analyzer yields a spectrum of neutron counts versus time-of-flight between a slow neutron chopper and neutron detectors. The detectors are placed some fixed distance (flight path) away from the mechanical chopper. The 100-channel analyzer must receive a "start" pulse from the neutron chopper and a "stop" pulse from the neutron detectors. The time duration between these two pulses iurnishes an "on" gate to a 200 kc oscillator. The number of 200 kc pulses that pass through the "on" gate and through a preset frequency divider determines which of the 100 time- channels will receive the "stop" pulse. A decade scaler and a unit scaler polarize the proper column and row, respectively, of a 10 x 10 matrix of electromagnetic relays. Only the doubly polarized relay will store the "stop" pulse into its associated electro-mechanical register. Each of the electro- mechanical registers can receive up to 200 counts per second and can store up to 9999 counts. Channel widths of 5, 10, 20, 40, and 80 microseconds can be preselected by switching in 0, 1, 2, 3, or 4 binary frequency dividers in series with the 200 kc oscillator. The energy spectrum is obtained from the time-of- flight spectrum through the relationship: t(microseconds per meter) = 72.3/E/sup 1/2/ (electron volts). (TTT)

• Research Organization: Inst. of Nuclear Research, Polish Academy of Sciences, Warsaw
• NSA Number: NSA-14-021727
• OSTI ID: 4162597
• Journal Information: Nukleonika (Poland), Journal Name: Nukleonika (Poland) Vol. Vol: 4; ISSN NUKLA
• Country of Publication: Country unknown/Code not available
• Language: Polish

Related Subjects

CHOPPERS
CIRCUITS
ENGINEERING AND EQUIPMENT
FREQUENCY
LABORATORY EQUIPMENT
MATHEMATICS
NEUTRON DETECTION
OPERATION
OSCILLATIONS
POLARIZATION
PULSE ANALYZERS
PULSE GENERATORS
PULSES
RADIATION DETECTORS
RECORDING SYSTEMS
RELAYS
RESONANCE
ROTATION
SCALERS
SIGNALS
SPECTRA
THERMAL NEUTRONS
VELOCITY