TEST EQUIPMENT FOR AN EVALUATION OF ELECTRO-MAGNETIC RADIATION. VOLUME 1. APPLICATION OF EVAPORATED THERMOCOUPLES TO DETECTION OF RF POWER IN BRIDGE WIRES OF ELECTRO-EXPLOSIVE DEVICES
Abstract
VOLUME I- A review of the development and a discussion of the present status of vacuum deposited thermocouples are given. Measurements of thermoelectric powers and resistivities of evaporated (over) films are given as a function of age for various thicknesses. Also presented are the effects of heat on film resistances and thermoelectric powers and studies of alumel films. A multiple beam interferometer capable of measuring film thickness to + or - 20 A was constructed and a description is included. Improvements in vacuum deposition methods and thermocouple fabrication are described. A reference heat source capable of providing steady heat output as well as chopped radiation up to 100 cps is described. Results of tests attempting to determine aging characteristics, effect of humidity and effect of thermocouple coating materials for various types of lead connections and combinations of materials are presented. In addition, tests of the effects of organic solvent vapors are reported. Thin film substrate thermocouples having time constants of about 10 millisec which were developed are described. Results of measurements of Mk 1 squib bridge wire temperature rise above ambient as a function of current are given with corresponding vacuum deposited thermocouple sensitivities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1960
- Accession Number
- AD0250090
Entities
People
- R. C. Amme
- R. F. Calfee
Organizations
- Denver Research Institute