Engineering topics

Outlaw, R.

Publications and source records attributed to Outlaw, R..

3 records

NASA NTRS1985

Manipulator for Heating and Cooling in Ultrahigh Vacuum

In sample-transfer system for use in ultrahigh vacuum, samples mounted on threaded circular holder transferred to flip mechanism of manipulator by simple translation and rotation. Flip mechanism contains electrode assembly and thermocouple that make direct contact with sample. Copper plate and flexible strap attached to receiving block to cool sample. Simple modifications allow broad range of sample temperatures (150 to 1,750 K) and direct temperature measurements, while retaining advantage of additional degree of freedom provided by flip mechanism of precise manipulator.

Outlaw, R.↗

NASA NTRS1985

Ultrahigh-Vacuum Sample-Transfer System

Ultrahigh-vacuum (UHV) sample-transfer system developed features short-term (less than 30 minutes) transfer of samples from atmospheric pressure into sample manipulator within UHV analysis system without significantly degrading system pressure. New system is austere approach to sample transfer, involving no automation. Total cost of system is factor of 10 less than commercially available instruments.

Outlaw, R.↗

NASA NTRS1973

The solution of transcendental equations

Some of the existing methods to globally approximate the roots of transcendental equations namely, Graeffe's method, are studied. Summation of the reciprocated roots, Whittaker-Bernoulli method, and the extension of Bernoulli's method via Koenig's theorem are presented. The Aitken's delta squared process is used to accelerate the convergence. Finally, the suitability of these methods is discussed in various cases.

Agrawal, K. M.↗