Precision Spectroscopy to Enable Traceable Dynamic Measurements of Pressure

Abstract

We present recent work aimed at creating a standard for the dynamic measurement of pressure. A near-IR laser spectroscopy system is demonstrated for measuring 8 cm−1 in 50 μs with a 4 kHz repetition rate.

Towards traceable transient pressure metrology

“…[3–7] While a traceability chain for static pressure is well-established [8–11], traceable calibration services for the dynamic measurement of pressure are lacking and therefore, the uncertainty for the dynamic sensors used in this field is not accurately known. [12–15] The quantification of uncertainty in dynamic sensors remains an active area of research at various National Metrology Institutes (NMI). Currently no NMI has a listing of a Calibration Measurement Capability (CMC) for time-varying pressure measurements in the Key Comparison Database.…”

“…Currently no NMI has a listing of a Calibration Measurement Capability (CMC) for time-varying pressure measurements in the Key Comparison Database. [3, 12–17] It is our goal to develop a traceable calibration to a nationally (or internationally) recognized standard.…”

“…A few critical applications are shown in figure 1, which require accurate rapid pressure measurements over seven orders of magnitude with time scales on the order of microseconds to several milliseconds [3][4][5][6][7]. While a traceability chain for static pressure is well-established [8][9][10][11], traceable calibration services for the dynamic measurement of pressure are lacking and therefore, the uncertainty for the dynamic sensors used in this field is not accurately known [12][13][14][15]. The quantification of uncertainty in dynamic sensors remains an active area of research at various National Metrology Institutes (NMI).…”

“…The quantification of uncertainty in dynamic sensors remains an active area of research at various National Metrology Institutes (NMI). Currently, no NMI has a listing of a calibration measurement capability (CMC) for time-varying pressure measurements in the key comparison database [3,[12][13][14][15][16][17]. It is our goal to develop a traceable calibration to a nationally (or internationally) recognized standard.…”