Imagine trying to tune a radio to a single station but instead encountering static noise and interfering signals from your own equipment. That is the challenge facing research teams searching for evidence of extremely rare events that could help understand the origin and nature of matter in the universe. It turns out that when you are trying to tune into some of the universe's weakest signals, it helps to make your instruments very quiet.
. The research team points out in their study that low-radioactivity cables can increase the sensitivity of the experiments and even allow more flexibility in detector design.So, exactly what are the researchers looking for in these experiments? In the case of both dark matter and neutrinoless double beta decay, they are hoping to record extremely rare events that could solve two key mysteries of the universe.
"Every step we take to eliminate interfering radioactivity gets us closer to finding evidence for dark matter or neutrinoless double beta decay," said Saldanha. "Next generation searches for neutrinoless double beta decay will be among the lowest radioactivity experiments ever constructed," said David Moore, a Yale University physicist and PNNL collaborator.
"One component that we can't avoid in our detector are the cables that transmit the signals, which must be of very low radioactivity," said Alvaro E Chavarria, a physicist at the University of Washington and a collaborator on the DAMIC-M project.
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