It’s chilly here: Lowest temperature at Fermilab reached in equipment for dark matter experiment

Categories: Cosmic Frontier
Published on: February 19, 2020
Fermilab scientist Matt Hollister works on the world’s largest dry dilution fridge, which will be used for the SuperCDMS experiment at SNOLAB. Image: Reidar Hahn, Fermilab

After riding in a cage with nickel miners, walking down drifts and stopping at the dry, SuperCDMS scientists enter their shotcrete igloo of discovery deep underground.

Translating this out of mining lingo: After taking an elevator down a two-kilometer mineshaft with nickel miners, Fermilab scientists walk through nearly two more kilometers of tunnels and then shower and change before entering the white-walled cavern that will house the Super Cryogenic Dark Matter Search, an experiment that will look for dark matter particles with masses ranging from half to 10 times the mass of a proton.

By Catherine N. Steffel. You can read the entire article at the Fermilab News web site.

ADMX experiment places world’s best constraint on dark matter axions

Categories: Cosmic Frontier
Published on: December 18, 2019
As the ADMX detector is removed from its magnet, the liquid helium used to cool the experiment forms vapor. Photo: Rakshya Khatiwada

In 2017, ADMX operated with the highest sensitivity of any axion experiment to date. In doing so, it ruled out a range of possible axion masses.

Now the ADMX collaboration released its latest results based on data taken in 2018. The new results rule out yet another mass range, four times wider than the first, while maintaining the same degree of exceptional sensitivity.

By Caitlyn Buongiorno. You can read this article at the Fermilab News web site.

Department of Energy awards Fermilab funding for next-generation dark matter research

Categories: Intensity Frontier
Published on: November 20, 2019
Engineers work on highly sensitive skipper CCDs. Researchers will use these sensors to search for low-mass dark matter particles. Photo: Reidar Hahn

In October 2019, the Department of Energy announced that it has awarded scientists at its Fermi National Accelerator Laboratory funding to boost research on dark matter, the mysterious substance that makes up an astounding 85% of the matter in the universe.

The award will fund two Fermilab projects focused on searching for dark matter particles of low mass — less than the mass of a proton.

A press releases from Fermilab, edited by Leah Hesla.

Dark Matter day is just around the corner

Categories: Cosmic Frontier
Tags:
Published on: October 29, 2019
Check out the Dark Matter Day website for an event near you on Oct. 31.

Fermilab is celebrating Dark Matter Day with a Facebook Live event — underground! On Thursday, Oct. 31, at 10 a.m. CT, visit Fermilab’s Facebook page to hear our scientists chat about their exciting dark matter investigations from one of Fermilab’s underground experimental halls.

By the Interactions collaboration. You can read this press release at the Fermilab News site.

Our gothic universe

Categories: Physics in a Nutshell
Published on: January 29, 2017

An introduction to the concept of “dark energy.”

http://news.fnal.gov/2012/02/our-gothic-universe/, by Don Lincoln.

Dark matter: Are you serious?

Categories: Physics in a Nutshell
Tags:
Published on: January 8, 2017

An introduction to why we believe that Dark Matter is a good solution to observations of galactic rotations.

http://news.fnal.gov/2012/01/dark-matter-are-you-serious/, Don Lincoln.

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.

Bringing dark matter to Earth

Categories: CMS/LHC, Energy Frontier
Tags:
Published on: May 25, 2016


CMS scientists have defined a new set of variables, called “razor variables,” that are being used to search for dark matter in data recorded using the Large Hadron Collider.


http://news.fnal.gov/2016/04/bringing-dark-matter-earth/, by Don Lincoln.

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.

The hunt for dark matter turns to subhalos

Tags:
Published on: July 16, 2015

Can we detect dark mater from cosmic gamma rays? Experiemnters in the Fermi Gamma-Ray Space Telescope collaboration think, “Maybe so!”

http://www.fnal.gov/pub/today/archive/archive_2015/today15-06-12.html, by Dan Hooper.

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