Scientists are deploying a groundbreaking new detector deep beneath the French Alps to uncover the mysteries of dark matter, which constitutes roughly 85% of the universe’s total mass yet remains elusive.
Why it matters: Traditional methods of dark matter detection have failed to yield definitive results after four decades of rigorous searching, prompting researchers to theorize that the elusive particles could be significantly less massive than previously thought.
The details:
- The detector, known as DAMIC-M, employs silicon skipper charged-coupled devices (CCDs) which can detect much lower-energy events, enabling the detection of lighter dark matter particles that would otherwise go unnoticed.
- DAMIC-M is encased in an environment meticulously shielded from background radiation, located around 1.2 miles beneath the French Alps, where vast amounts of bedrock, along with specially manufactured electroformed copper and low-radioactivity lead, help filter out unwanted signals.
- The current prototype features eight silicon skipper CCDs, with plans to expand to a full-sized experiment utilizing 208 sensors, making DAMIC-M the most sensitive dark matter detector in the world.
- Early tests of the detector have shown it to operate as designed, marking a promising advancement in potentially mapping out a previously unexplored region of physics.
“We need to broaden our search, and now we can,” said Danielle Norcini of Johns Hopkins University, expressing the need to expand their search parameters.
“Trying to lock in on dark matter’s signal is like trying to hear somebody whisper in a stadium full of people. That’s how small the signal is,” Norcini explained.
What’s next: Following the success with the prototype, the full DAMIC-M apparatus will begin data collection in 2026, with researchers anticipating that this larger-scale detector will enhance chances of capturing rare interactions with improved shielding and lower contamination.