Development of the optical vacuum standard system in KRISS |
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| Han Wook Song, Jong Ho Kim, MinKy Seo, Sungwan Cho, Sam Yong Woo |
- Abstract:
- Recently, ‘a new realization of the Pascal’ by using photon technology showed comparable results in terms of performance compared to the existing primary standard based on a mercury manometer. In this study, we describe KRISS optical vacuum standard system uses a 633 nm He-Ne laser, specially made by KRISS, as a light source, and a double channeled Fabry-Perot (FP) cavity made from ZERODUR. Hardware construction for KRISS optical pressure standard system has been completed. Currently, as the first step, it is aimed at calculating the pressure according to the frequency in the pressure range of 1 Pa to 10 kPa using nitrogen gas. Using the measured beating frequency, we determined the internal pressure in the cavity considering the refractive index virial coefficients (AR, BR and CR) and density virial coefficients (Ap, Bp and Cp), the Boltzmann constant kB, and the thermodynamic temperature. The uncertainty is currently in evaluation taking into account the uncertainty factor.
- Download:
- IMEKO-TC16-2023-07.pdf
- DOI:
- 10.21014/tc16-2023.07
- Event details
- IMEKO TC:
- TC16
- Event name:
- TC16 Conference 2023
- Title:
7th Conference on Pressure and Vacuum Measurement (together with the CCM - the Consultative Committee for Mass and Related Quantities of the BIPM)
- Place:
- Washington DC, UNITED STATES
- Time:
- 15 May 2023 - 19 May 2023