Strain and temperature measurement

Details Strain and temperature measurement Strain and temperature measurement

1988-05-11

1990-05-08

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

25039001, G01N 23206

Patent

active

049241001

ABSTRACT:
A method of non-invasively measuring strain and temperature of an object, substantially simultaneously, using neutrons of selected energy levels is described. A pulsed neutron source is made to emit thermal and epithermal neutrons in a collimated beam directed at a target object. Temperature is monitored by observing the thermal Doppler broadening of resonances in the neutron transmission characteristic for the epithermal neutrons and strain is measured from observations made of changes to the thermal neutron diffraction pattern.

REFERENCES:
Bloch et al., "Neutron Scattering at High Pressure", Rev. Scien. Instrum., vol. 47 (No. 3), Mar. 1976, pp. 296-298.
Kamigaki, "A High-Pressure Apparatus for TOF Neutron Diffraction", Japanese J. Applied Physics, vol. 19, Dec. 1980 (No. 12), pp. 2507-2508.
Harms et al., "Temperature Sensing by Neutron Transmisson", Nuclear Instrum. and Methods, vol. 104 (No. 1), Oct. 1972, p. 217.
Sinclair et al., "Structural Studies of Amorphous Materials Using a Pulsed Neutron Source", Nuc. Instrum. and Methods, vol. 117 (No. 2), May 1974, pp. 445-454.
McWhan et al., "Apparatus for Neutron Diffraction at High Pressure", Review Sci. Instrum., vol. 45 (No. 5), May 1974, pp. 643-646.
Draperi et al., "Neutron Scattering by Single Crystals under High Uniaxial Stress", Journal of Physics E: Scientific Instruments, 1976, vol. 9, pp. 174-175.

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