METHODS FOR PRECISION TEMPERATURE CONTROL
Abstract
IT IS POSSIBLE TO FABRICATE A MINIATURE, PARTIALLY SILVERED Pyrex dewar whose vacuum will not deteriorate appreciably for at least 6 months. Pyrex remains the best choice of material from which to make glass dewars. It is possible to make an oven with an accessible crystal whose insulation system has a heat loss of less than 300 milliwatts between -55 and +85 C. A partially silvered Pyrex outer dewar combined with our standard Pyrex inner dewar can improve the performance of the inner dewar by at least 100 milliwatts at the expense of about 2-1/4 in. increased volume. Using this insulation system in conjunction with a fully operational core, it is possible to make an oven accessible crystal which requires a total average input of less than 400 milliwatts to maintain the crystal at +85 C while ambient is at -55 C. It is possible to maintain the crystal temperature to within ! 0.10 C over the ambient temperature range of -55 to +80 C. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1962
- Accession Number
- AD0285381
Entities
People
- Anne Everest
- Igor A. Black
- Theodore P. Heuchling
Organizations
- Arthur D. Little