93 citations · 416 across the 16 of their papers we have counts for
7 papers · 1 filter
On the effect of "glancing" collisions in the cold atom vacuum standard
Stephen P. Eckel, Daniel S. Barker, James A. Fedchak +3
We theoretically investigate the effect of ``glancing" collisions on the ultra-high vacuum (UHV) pressure readings of the cold atom vacuum standard (CAVS), based on either ultracol…
Accurate measurement of the loss rate of cold atoms due to background gas collisions for the quantum-based cold atom vacuum standard
Daniel S. Barker, James A. Fedchak, Jacek Kłos +4
We present measurements of thermalized collisional rate coefficients for ultra-cold Li and Rb colliding with room-temperature He, Ne, N, Ar, Kr, and Xe. In our exper…
Comparison of two multiplexed portable cold-atom vacuum standards
Lucas H. Ehinger, Bishnu P. Acharya, Daniel S. Barker +4
We compare the vacuum measured by two portable cold-atom vacuum standards (pCAVS) based on ultracold Li atoms. The pCAVS are quantum-based standards that use a priori scatterin…
Nuclear-Spin Dependent Parity Violation in Optically Trapped Polyatomic Molecules
Eric B. Norrgard, Daniel S. Barker, Stephen P. Eckel +3
We investigate using optically trapped linear polyatomic molecules as probes of nuclear spin-dependent parity violation. The presence of closely spaced, opposite-parity -doub…
Single-beam Zeeman slower and magneto-optical trap using a nanofabricated grating
D. S. Barker, E. B. Norrgard, N. N. Klimov +3
We demonstrate a compact (0.25 L) system for laser cooling and trapping atoms from a heated dispenser source. Our system uses a nanofabricated diffraction grating to generate a mag…
Challenges to miniaturizing cold atom technology for deployable vacuum metrology
Stephen Eckel, Daniel S. Barker, James A. Fedchak +3
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. The development of…
Light-induced atomic desorption of lithium
D. S. Barker, E. B. Norrgard, J. Scherschligt +2
We demonstrate loading of a Li magneto-optical trap using light-induced atomic desorption. The magneto-optical trap confines up to approximately ato…