Engineering topics

Eriksson, S

Publications and source records attributed to Eriksson, S.

2 records

DOE OSTI2011

Centrifugal Separation and Equilibration Dynamics in an Electron-Antiproton Plasma

Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of the separation dynamics in any centrifugally separated system. While the observed equilibrium states are expected and in agreement with theory, the equilibration time is approximately constant over a wide range of parameters, a surprising and as yet unexplained result. Electron-antiproton plasmas play a crucial role in antihydrogen trapping experiments.

70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗

DOE OSTI2010

Measuring Energy Differences by BEC Interferometry on a Chip

We investigate the use of a Bose-Einstein condensate trapped on an atom chip for making interferometric measurements of small energy differences. We measure and explain the noise in the energy difference of the split condensates, which derives from statistical noise in the number difference. We also consider systematic errors. A leading effect is the variation of the rf magnetic field in the trap with distance from the wires on the chip surface. This can produce energy differences that are comparable with those due to gravity.

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗