We wish to describe the construction of a hybrid glassmetal liquid helium dewar for low temperature optical studies. This dewar has been successfully used in the experimental study of second harmonic generation (SHG) in InSb using a CO 2 laser as the source of coherent radiation. 1 For this experime
A simplified helium dewar for optical studies
โ Scribed by B. Hagene
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- English
- Weight
- 64 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0011-2275
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๐ SIMILAR VOLUMES
A glass helium cryostat with copper shieM for optical and magneto-optical studies is described. The shield-insert placed in the nitrogen dewar without hindering visual observation at the liquid helium level, prevents scattering of light by the bubbles of boiling nitrogen.
The design of a continuous flow helium cryostat is described for optical studies with an optical fixed high-pressure chamber in the temperature range from 4 to 300 K. The liquid helium consumption for 4 K is 21 h-', and less than 0.5 1 h-'for temperatures above 20 K.
The bolometer calibration procedure is a modification of the original Alphin and Fisk method. 1