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James A. Fedchak

Jim Fedchak has been with NIST since 2003. He leads the vacuum project, which includes realizing and disseminating absolute pressures from 10-7 Pa to 30 Pa, and low gas flow from 10-12 mol/s to 10-6 mol/s. He is directly responsible for ionization gauge calibrations and spinning rotor gauge calibrations. Jim's knowledge of vacuum science and technology covers a variety of applications derived from his previous work experience. Previously, Jim worked with the Low-background Infrared Radiation project at NIST doing cryogenic infrared radiometry; worked in the photonics industry with New Focus Inc.; performed atomic spectroscopy at the University of Wisconsin; and developed spin-polarized targets at Argonne National Laboratory. He has a PhD in experimental atomic and molecular physics from the College of William and Mary. He has numerous publications in all of these fields. Jim is a member of the Low Pressure Working Group of the CCM, and is presently a member of the AVS Vacuum Technology Division Committee.

Publications

Light-induced atomic desorption of lithium

Author(s)
Daniel S. Barker, Eric B. Norrgard, Julia K. Scherschligt, James A. Fedchak, Stephen P. Eckel
We demonstrate loading of a Li magneto-optical trap using light-induced atomic desorption. The magneto-optical trap confines up to approximately 10000 lithium

Challenges to miniaturizing cold atom technology for deployable vacuum metrology

Author(s)
Stephen P. Eckel, Daniel S. Barker, James A. Fedchak, Nikolai N. Klimov, Eric B. Norrgard, Julia K. Scherschligt, Constantinos Makrides, Eite Tiesinga
Cold atoms are excellent metrological tools; they currently realize SI time and, soon, SI pressure in the ultra-high (UHV) and extreme high vacuum (XHV) regimes
Created October 9, 2019