Dark matter search with bubble chambers

Categories: Cosmic Frontier
Published on: July 17, 2016
This is an electronic image of a typical microscopic quartz particulate found during the investigation of the active mass of the PICO-2L detector after its first run. The image was taken using an EDS-SEM (scanning electron microscopy with X-ray microanalysis). Such particulate contamination was thought to be the cause for the anomalous background, and a profound effort went into its elimination (and suppression of its production) for the follow up PICO-2L WIMP-search run.

Presented here is a description of the PICO experiment, which has achieved one of the world’s best exclusions for the detection of Weakly-Interacting Massive Particles (WIMPs): the leading candidate for the Dark Matter particle.

This podcast is a little longer than usual: 8 minutes, 45 seconds.

http://news.fnal.gov/2016/07/dark-matter-search-bubble-chambers/, by Chanpreet Amole: a Ph.D. candidate at Queen’s University in Canada.

The lightness of dark matter

Categories: Cosmic Frontier
Published on: October 4, 2015
The new CDMSlite result (black solid line with salmon-shaded band), compared with some other recent results on low-mass dark matter.

No WIMP signal is yet visible in the data from CDMS (Cold Dark Matter Survey, at Fermilab). But the experiment has considerably narrowed the region where light WIMPS might be hiding.

http://www.fnal.gov/pub/today/archive/archive_2015/today15-09-22.html, by Dan Bauer.

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