Published February 1979
| Published
Journal Article
Open
Control of ultralow pressures: an absolute thermodynamic manometer
- Creators
- Taborek, Peter
- Goodstein, David
Abstract
A method of accurately manipulating the pressure of helium gas in the range P=10^–1 to 10^–20 Torr, T<5 K is presented. The method requires only a very modest apparatus and makes use of thermodynamic measurements on the 4He–Grafoil system. A calibration curve and a pressure scale for the manometer are developed which will allow convenient application in other laboratories. An experiment which utilizes the technique is briefly disscussed.
Additional Information
© 1979 American Institute of Physics. (Received 7 August 1978; in final form, 13 October 1978) We would like to thank O. Vilches for sending us the unpublished vapor pressure isotherm and heat capacity data taken by the Washington group. We also thank M. Bretz for sending us heat capacity data prior to publication, and J. Greif for the use of several computer programs used to analyze the data. The assistance of Sai Wai Fu in taking the vapor pressure data is gratefully acknowledged.Attached Files
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Additional details
- Eprint ID
- 10369
- Resolver ID
- CaltechAUTHORS:TABrsi79
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2008-05-01Created from EPrint's datestamp field
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2022-05-11Created from EPrint's last_modified field