Neutron cross section measurements at ORELA

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5392286

Dabbs, J. W.T.

ORELA (Oak Ridge Electron Linear Accelerator) has been for the last decade the most powerful and useful pulsed neutron time-of-flight facility in the world, particularly in the broad midrange of neutron energies (10 eV to 1 MeV). This position will be enhanced with the addition of a pulse narrowing prebuncher, recently installed and now under test. Neutron capture, fission, scattering, and total cross sections are measured by members of the Physics and Engineering Physics Divisions of ORNL, and by numerous guests and visitors. Several fundamental and applied measurements are described, with some emphasis on instrumentation used. The facility comprises the accelerator and its target(s), 10 evacuated neutron flight paths having 18 measurement stations at flight path distances 8.9 to 200 meters, and a complex 4-computer data acquisition system capable of handling some 17,000 32-bit events/s from a total of 12 data input ports. The system provides a total of 2.08 x 10/sup 6/ words of data storage on 3 fast disk units. In addition, a dedicated PDP-10 timesharing system with a 250-megabyte disk system and 4 PDP-15 graphic display satellites permits on-site data reduction and analysis. More than 10 man-years of application software development supports the system, which is used directly by individual experiments. 12 figures, 1 table.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE Division of Nuclear Science
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5392286
• Report Number(s): CONF-791058--67
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BARYON REACTIONS
BARYONS
BEAM MONITORS
CROSS SECTIONS
DATA ACQUISITION SYSTEMS
ELEMENTARY PARTICLES
ENERGY RANGE
EPITHERMAL NEUTRONS
EV RANGE
FAST NEUTRONS
FERMIONS
HADRON REACTIONS
HADRONS
INELASTIC SCATTERING
INTERMEDIATE NEUTRONS
KEV RANGE
LINEAR ACCELERATORS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 01-10
NEUTRON REACTIONS
NEUTRON SOURCES
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
ORELA
PARTICLE SOURCES
PULSES
RADIATION SOURCES
RESEARCH PROGRAMS
SCATTERING
TARGETS
TIME-OF-FLIGHT METHOD
TOTAL CROSS SECTIONS
URANIUM 238 TARGET