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As technology improves, scientists discover new ways to search for theorized dark matter particles called axions. Four decades after they were first theorized, axions are enjoying a moment in the sun, and may even be on the verge of detection, poised to solve two major problems in physics at once.
From Scientific American, February 2020: Collaborators from eight institutions have come together to turn a mine shaft at Fermilab into the world’s largest atom interferometer — MAGIS-100. The researchers plan to assemble the instrument in 2021 and start harnessing lasers to expand submicroscopic strontium atoms into macroscale “atom waves” soon after. Fermilab scientist Rob Plunkett comments on the mind-boggling experiment.
From SLAC, Jan. 13, 2020: Matching up maps of matter and light from the Dark Energy Survey, hosted at Fermilab, and Fermi Gamma-ray Space Telescope may help astrophysicists understand what causes a faint cosmic gamma-ray glow.
Fermilab scientists have reached the lowest temperature ever achieved at Fermilab, testing a refrigerator for the SuperCDMS dark matter experiment. The fridge, which operates at close to absolute zero, is now one step closer toward installation at SNOLAB in Canada.
From Gizmodo, Dec. 13, 2019: Fermilab scientist Dan Hooper is quoted in this article on a new paper that says dark matter could be responsible for the mysterious observation of gamma rays in the center of our galaxy.
From Time, Dec. 6, 2019: Fermilab scientist Dan Hooper summarizes the current state of the search for dark matter. Scientists can say with great confidence that we understand how and why our universe evolved over the vast majority of its history. From this perspective, the universe looks more comprehensible than ever before. And yet, not all is understood.
Come and hear McDonald talk about how deep underground experiments help address fundamental questions about neutrino properties and search for dark matter, which makes up 26% of our universe.
From The Mac Observer, Nov. 25, 2019: In this 30-minute podcast episode, Fermilab scientist Dan Hooper recounts how he caught the astrophysics bug as an undergraduate, landed a postdoc position at Oxford and was later hired at Fermilab. He chats about his interest in the interface between particle physics and cosmology, dark matter and what neutrinos can tell us about the early universe.
A series of joint NASA and ESA spacewalks four years in the making aims to extend the life of the AMS particle detector. On Nov. 15, astronauts took on a series of tasks ranging in difficulty from zip-tie-cutting to safely launching a piece of equipment into space, all while orbiting the planet at around 5 miles per second. The goal was to fix a component of the Alpha Magnetic Spectrometer, an international particle physics experiment, and to extend its study of cosmic rays, dark matter and antimatter for another decade.
ADMX has ruled out a region where a hypothetical dark matter particle called an axion could have been hiding. The new results are drawn from four times more data than the previous results and will serve as an important guide for other experiments on where to look for this elusive particle.