Macrostrain measurement using radial collimators at LANSCE
A series of `short` radial collimators have been implemented in the 90{degrees} scattering geometries on the neutron powder diffractometer at Los Alamos. The capability to perform macrostrain measurements has been improved by the commensurate ability to rapidly select a sampling volume appropriate to the specimen. The compact design of the collimators was dictated by the need to fit them in a cylindrical vacuum chamber as well as providing space in which to manipulate a specimen in three dimensions. Collimators of different vane lengths were fabricated to give 4 different resolutions for which 2/3 of the diffracted intensity comes form distances of 0.75, 1. 25, 2.5, and 4.0 mm along the incident beam. Qualifying scans and a demonstration of a cracked ring, containing a steep stress gradient, are included.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 240495
- Report Number(s):
- LA-UR-96-1580; CONF-960690-6; ON: DE96011227
- Resource Relation:
- Conference: 5. international conference on applications of nuclear techniques: neutrons in research and industry, Crete (Greece), 9-15 Jun 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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