The use of infrared absorption to determine density of liquid hydrogen.Experimental evaluation of the use of infrared absorption for determining the density of liquid hydrogen, and discussion of the feasibility of an airborne densitometer based on this concept. The results indicate that infrared absorption of liquid hydrogen is highly sensitive to the density of hydrogen, and, under the operating limitations of the equipment and experimental techniques used, the determined values proved to be repeatable to an accuracy of 2.7%. The desiderata and limitations of an in-flight density-determining device are outlined, and some of the feasibility problems are defined.
Other - Collected Works
Unland, H. D.
Timmerhaus, K. D.
Kropschot, R. H. (Colorado, University Boulder, Colo., United States)