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Temperature Stabilization System with Millikelvin Gradients for Air Refractometry Measurements Below the 10^-8 Level

Published

Author(s)

Patrick F. Egan, Jack A. Stone Jr.

Abstract

Refractometry of air is a central problem for interferometer-based dimensional measurements. Refractometry at the 10−9 level is only valid if air temperature gradients are controlled at the millikelvin (mK) level. Very precise tests of secondgeneration National Institute of Standards and Technology (NIST) refractometers involve comparing two instruments (two optical cavities made from ultralow expansion glass) that are located in nominally the same environment; temperature gradients must be kept below a few millikelvin to achieve satisfactory precision of these tests. This paper describes a thermal stabilization scheme that maintains
Citation
NCSL International Measure
Volume
6
Issue
7

Citation

Egan, P. and Stone, J. (2011), Temperature Stabilization System with Millikelvin Gradients for Air Refractometry Measurements Below the 10^-8 Level, NCSL International Measure, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907214 (Accessed April 20, 2024)
Created March 1, 2011, Updated February 19, 2017