Um, not so fast...
If I understand the technology correctly (which is a BIG assumption), you need a device to transmit muons and another device on the far side of the target to detect the trajectory deviations, so detecting submarines and tunnels might be difficult...
I only read it once, but my impression is that we're catching free muons from outer space. IIRC, we study muons and subatomic particles in particle accelerators when they smash into each other at speeds close to the speed of light.
This ain’t my field so I’m not sure if I’ve got it right.
I think there is an ample supply of muons coming to us from outer space. If there’s enough of them, the effect might be similar to seeing an object pass in front of a light where you’re not so much seeing the object as the shape of the object blocking the photons from reaching your eye.
If there’s NOT enough of them for a detector to establish a usable background level then there’s a problem.
The universities doing cosmic muon detection report varying muon counts per hour. However, even the lower counts in the hundreds per hour sound like enough for a proof of concept device.
An interesting thing is that the detectors look trivial in design. Here’s a “Simple DIY (do-it-yourself) Cosmic Ray Detector”:
I read it as more like reading wind speed by using a rain gauge.
Not if you knew where they were!
(Z ducks)