title: Transient gas density measurement using neutron radiography.
abstract: Neutron radiography is discussed as a line-of-sight gasdynamic diagnostic technique for studying internal flows in opaque, complicated geometry flow systems which are not optically accessible. Because neutron attenuation is very sensitive to nuclear structure, many material combinations that are difficult or impossible to image with optical techniques or x rays can be imaged by means of neutron radiography. The problem presented to demonstrate the neutron radiographic technique is the determination of the time-resolved gas-gas interface location inside a gas transfer system composed of three pressure vessels connected by opaque, thick-walled tubing.
authors.affiliation: Sandia Laboratories, Livermore, California 94550.
authors.forename: S C
authors.initials: SC
authors.lastname: Johnston
authors.forename: L W
authors.initials: LW
authors.lastname: Dahlke