Rachel Cortland, in an article in the May edition of the Institute of
Electrical and Electronic Engineers Spectrum Magazine, reports on
a sophisticated and highly sensitive instrument being built at the
University of Washington in Seattle called the
Axion Dark Matter
eXperiment (ADMX).
Axions are one of the dark matter candidates.
The leading particle candidate, the weakly interacting massive particle,
or WIMP, is theorized to have a mass perhaps a hundred times that of
a proton.
Yet despite around 20 active experiments, no WIMP has yet been detected.
The axion, by contrast, is theoretically one trillionth the mass of the proton
and ADMX is the only experiment looking for them.
Article here -
http://spectrum.ieee.org/aerospace/a...nvisible-axion
ADMX web site here
http://www.phys.washington.edu/groups/admx/home.html