19 citations · 46 across the 6 of their papers we have counts for
7 papers
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…
A constant pressure flowmeter for extreme-high vacuum
S. Eckel, D. S. Barker, J. Fedchak +3
We demonstrate operation of a constant-pressure flowmeter capable of generating and accurately measuring flows as low as mol/s. Generation of such small flows is…
-enhanced gray molasses in a tetrahedral laser beam geometry
D. S. Barker, E. B. Norrgard, N. N. Klimov +3
We report observation of sub-Doppler cooling of lithium using an irregular-tetrahedral laser beam arrangement, which is produced by a nanofabricated diffraction grating. We are abl…
A Bitter-type electromagnet for complex atomic trapping and manipulation
J. L. Siegel, D. S. Barker, J. Fedchak +2
We create a pair of symmetric Bitter-type electromagnet assemblies capable of producing multiple field configurations including uniform magnetic fields, spherical quadruple traps,…
A radiofrequency voltage-controlled current source for quantum spin manipulation
D. S. Barker, A. Restelli, J. A. Fedchak +2
We present a design for a wide-bandwidth, voltage-controlled current source that is easily integrated with radiofrequency magnetic field coils. Our design uses current feedback to…
A flexible, open-source radio-frequency driver for acousto-optic and electro-optic devices
D. S. Barker, N. C. Pisenti, A. Restelli +4
We present a design for a radio-frequency driver that leverages telecom amplifiers to achieve high power output and wide bandwidth. The design consists of two compact printed circu…
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…