The Invisible Universe
Dark matter, which makes up about 27% of the universe’s total energy density and 85% of all matter, is still invisible to normal observation. Unlike regular matter, dark matter doesn’t absorb, reflect, or give off light. Instead, it barely interacts with light or ordinary matter, which is why telescopes cannot see it directly. This means that scientists can’t use telescopes to look at it directly. Instead, they have to figure out that it’s there by looking at how it affects galaxies and galaxy clusters.
Fusion Reactors as a Potential Source of Dark Matter Candidates
Recent theoretical investigations indicate that fusion reactors—high-energy experimental facilities aimed at emulating the processes that energize the Sun—may provide a novel approach to examine hypothetical dark matter particles, including axion-like particles. We haven’t found these particles yet, but if they do exist, they would have very weak interactions with regular matter.
Neutron Interactions in Reactor Materials
Deuterium-tritium fusion reactors, such as the ITER reactor being built in France, produce high-energy neutrons as a byproduct of their reactions. These neutrons interact with the materials that make up the reactor, especially the lithium-lined walls that help make tritium fuel. In rare theoretical scenarios, such collisions could excite atomic nuclei in these materials.
Hypothetical Axion Production
Normally, excited nuclei release energy as gamma-ray photons. Some models suggest that, under very specific conditions, a tiny fraction of this energy could instead be emitted as axion-like particles. Similarly, as neutrons scatter and slow down within reactor materials, processes analogous to bremsstrahlung could — in theory — produce such particles. These ideas remain speculative and have not yet been observed experimentally.
Towards Dark Matter Experiments
Because axion-like particles would barely interact with ordinary matter, they could pass through the reactor’s shielding. This means that, in theory, specialized tools set up outside the reactor could find them. Fusion reactors could be both sources of energy and places to study dark matter in ways that are not possible now.
A New Era in Dark Matter Research Even though these ideas are still just ideas, they could lead to a new way to study one of the biggest mysteries in physics. Fusion reactors could help scientists learn more about dark matter particles that we can’t see by producing and studying them under controlled conditions. This would work well with both astronomical observations and experiments done underground.
Sources:
ScienceDaily — “Fusion reactors may create dark matter particles”
Gadgets360 — “Fusion Reactors Could Generate Axions, Offering a New Path to Detect Dark Matter”
ScienceAlert — “Fusion Reactors Might Create Dark Matter Particles, Physicists Show”
Editor’s Disclaimer:
This article discusses theoretical research on dark matter and the potential for fusion reactors to produce axion-like particles. The concepts described are speculative and have not been confirmed by experimental observation. Readers should understand that these ideas represent ongoing scientific investigation and are not established scientific fact.
