Published Research - Department of Chemistry


Date of this Version

February 1973


Published by the American Institute of Physics. Rev. Sci Instrum.Volume 44, Issue 2, pp. 149-151 (1973). ©1973 American Institute of Physics. Permission to use.


An economical two-circle orienting external goniometer has been designed and fabricated for an Andonian liquid helium Dewar. The Dewar can be tilted ±30° from the vertical in two perpendicular directions. The geometrical center of the Dewar's optical cavity moves a maximum of 1 mm when the cryostat is tilted the full 30°. The basic design involves the rotation of two concentric cylinders riding on bearing surfaces. Two chain belts and gear boxes are used as drive mechanisms.

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