Title: NIST Develops Advanced Primary Pressure Measurement Standards
NIST has created the most precise primary pressure measurement standards in the world, covering a pressure range from 0.01 Pa to 360 kPa. These standards use liquid-column manometers, which are complex instruments requiring accurate measurements of temperature, density, gravity, and the speed of sound. The manometers employ an ultrasonic interferometric technique that allows for a column height resolution of 10 nm to 20 nm. Custom electronics and software use a pulse-echo technique to determine the length of the mercury or oil column by measuring the phase difference between sent and received radio-frequency acoustic signals. A diffraction correction model further refines the measurements.
The NIST pressure measurement standards will have a significant impact on various industries, including aerospace, automotive, and medical device manufacturing, by providing the most accurate and reliable pressure measurements available. These standards will enable the development of more precise and reliable pressure sensors and instruments, leading to improved product performance and safety. The implementation of these standards is expected to take some time, as it requires the development of new measurement techniques and the calibration of existing instruments. However, once implemented, these standards will set a new benchmark for pressure measurement accuracy and reliability.
Source: https://www.nist.gov/laboratories/tools-instruments/low-pressure-gauges
Keywords: spin squeezing, entanglement, quantum gates
