Simple Housing Research Articles

Vacuum Interferometer and Cadmium Oven

Temperature and pressure changes during observation by means of a Fabry-Perot interferometer are discussed. A temperature regulated vacuum chamber has been designed to minimize the effects of these changes. Details of a simple and efficient interferometer and housing are given. A convenient and satisfactory oven for holding a Michelson lamp at any desired temperature between that of the room to the standard 315°C is described in detail. The vacuum interferometer, the lamp house, and the assembly used to compare the spectra of Hg-198 and Cd-114 are shown by diagram and drawing.

Housing for Co60 Gamma-Ray Source For Experimental Work

A relatively simple housing for experimental work with multicurie radioactive sources consists of a lead turret on a low table, the volume below the table being shielded on three sides by stationary shielding and in front by a rolling lead door. The source capsule is screwed on to the end of a rod passing through vertical holes in the turret and the table. The source can be positioned in the center of the turret when not in use and, when desired, lowered to any position adjacent to experimental equipment below the table. Using a 40-curie Co60 source and an annular glass irradiation vessel, an average gamma-ray intensity of 2×105 r/hr is obtained in a 5-ml volume of liquid.

Vortex Thermometer for Measuring True Air Temperatures and True Air Speeds in Flight

The aerodynamic heating experienced by thermometers exposed from airplanes can be very nearly eliminated over a wide range of operating conditions by mounting the thermometer in the center of an air vortex created by a simple housing. This method has been found to simplify air temperature measurements over the operating range of a B-17 airplane. The instrument has promise for measuring temperatures in clouds. True air speeds can be measured by the difference between the temperature of the vortex thermometer and a thermometer exposed in the usual manner. Designs and flight data are presented for several vortex thermometers and a simple true air speed indicator.