Author Topic: Muon detection of overhead voids  (Read 430 times)

Offline alanw

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Muon detection of overhead voids
« on: December 07, 2021, 07:42:44 pm »
Following on from the discussion on "Detection of caves by seismic analysis", here's a UK company having won an award for their work with Network Rail in detecting overhead voids: blanked off shafts by detection of the muon count rate.

https://www.geoptic.co.uk/news-1/geoptic-wins-business-start-up-award

https://www.geoptic.co.uk/news-1/our-ground-engineering-article-is-out

I see there was a previous mention of muons here: https://ukcaving.com/board/index.php?topic=23074.msg291136#msg291136
Chris Densham, who had some interesting ideas about using muons to see what could be seen above his dig

I stumbled across this whilst investigating a headline in New Scientist that the same company had received funding to investigate the use of muons as an alternative to GPS in polar regions.

I don't subscribe anymore, since their reporting became less scientifically rigorous, they sold out to a new owner and put their price up by a ridiculous amount, but I'd be really interested in how they claim to be able to achieve this.

Offline alanw

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Re: Muon detection of overhead voids
« Reply #1 on: December 07, 2021, 07:50:49 pm »
A bit more here:
https://insidegnss.com/muons-make-the-alt-pnt-roster-with-ability-to-penetrate-rock-buildings-and-earth-and-act-at-high-latitude/

From the illustration, it seems that they are using the fact that a single cosmic ray hitting the upper atmosphere will trigger the simultaneous emission of many muons, and they are going to somehow correlate the detection of muons at known base stations with detection at an unknown location.

Muons can penetrate rock, so this is interesting in the context of cave surveying. It will, however, require a very accurate clock at the receiver, and it may require real-time communication with the base stations.

Offline shortscotsman

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Re: Muon detection of overhead voids
« Reply #2 on: December 07, 2021, 09:35:37 pm »
has been  used to find voids in pyramides:
https://physicsworld.com/a/muons-reveal-hidden-void-in-egyptian-pyramid/

Basically, if you get more muons coming from a specific direction it indicates there is less rock in that direction.

Unfortunately it needs the detectors underneath the void

Offline Martin Laverty

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Re: Muon detection of overhead voids
« Reply #3 on: December 07, 2021, 09:45:52 pm »
See also this from the 2017 International Congress of Speleology:
https://www.researchgate.net/publication/328912981_Cavity_Searching_and_3D_Density_Mapping_via_Muon_Tomography
and this from an International Planetary Caves Congress in 2015:
https://www.hou.usra.edu/meetings/2ndcaves2015/pdf/9030.pdf
...

Offline nickwilliams

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"Economics is simply the branch of sociology that deals with people trading items and the fact that they use more numbers does not make it anymore of a science."

 

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