As proton beams pass through the interaction point at the ATLAS instrument, they may create new particles that will go through concrete in the LHC tunnel and then into the FASER instrument, which will track and measure the progress of their decay. FASER will collect data any time ATLAS is operating.
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That seems like sifting through somebody’s garbage for clues.
I.e., privately funded, as this appears to be.
A couple million dollars doesn’t go very far in the particle accelerator world.
CERN is the leading cause of Global Warming. Every time they turn that dern thing on it kills a billion trees because they have to throw out all the old science books and print new ones.