2-7 June 2019
Simon Fraser University
America/Vancouver timezone
Welcome to the 2019 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2019 !

50 - A First Realization of a Quantum Pressure Standard

4 Jun 2019, 17:15
SWH 9082 + AQ South-East Corner / coin sud-est (Simon Fraser University)

SWH 9082 + AQ South-East Corner / coin sud-est

Simon Fraser University

Poster Competition (Graduate Student) / Compétition affiches (Étudiant(e) 2e ou 3e cycle) Division of Atomic, Molecular and Optical Physics, Canada / Division de la physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC) DAMOPC Poster Session & Student Poster Competition Finals (26) | Session d'affiches DPAMPC et finales du concours d'affiches étudiantes (26)


Mr Pinrui Shen (Department of Physics and Astronomy, University of British Columbia )


Since the first demonstration of the vacuum by Torricelli (circa 1643), vacuum measurement and technology have been applied to scientific research and industrial technologies including the processing of semiconductors and the study of the upper atmosphere. However, until now, there has never been a primary pressure standard for the high-vacuum and ultra-high vacuum (UHV), P<10−9 Torr, and lower. Our study of cold atom - hot background particle collisions has solved this problem. In this section, I will present the first quantum pressure standard, which is based on our discovery of a new class of universality (describing the loss rate of atoms from shallow traps of depth). A direct application of this quantum pressure standard is to calibrate and characterize ion gauge performance with different gas species (He, Ar, Xe, N2, H2, and CO2). Further, a MOT can be used as a transfer standard, enabling the quantum pressure standard to be connected to other pressure regimes. Finally, some future directions for this quantum pressure standard will be displayed.

Primary authors

Mr Pinrui Shen (Department of Physics and Astronomy, University of British Columbia ) Dr James Booth (Department of Physics, British Columbia Institute of Technology) Prof. Kirk Madison (Department of Physics and Astronomy, University of British Columbia) Prof. Roman Krems (Department of Chemistry, University of British Columbia)

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