5 ms·

I always wondered if we could create some type of neutrino scanning device. Neutrinos passes through most matter like nothing. You need a super large undergro

I always wondered if we could create some type of neutrino scanning device. Neutrinos passes through most matter like nothing. You need a super large underground water tank to detect it. One side of the pyramid would have the emitter. The other side, would have the receptor. And you bombard the pyramid with trillions and trillions of neutrinos, and collect the statistics. Then from this, it might help you formulate an image, and allow you to see what is inside the pyramid. The next question is: How do you create a neutrino? According to this video, it seems you can make a neutrino beam from a particle accelerator. https://www.youtube.com/watch?v=U_xWDWKq1CM https://www.youtube.com/watch?v=U_xWDWKq1CM Again, IANAPS, I am not a particle scientist.

Cyphase 9y ago
The Sun is already bombarding everything with trillions and trillions of neutrinos. > In the vicinity of the Earth, about 65 billion (6.5×10^10) solar neutrinos per second pass through every square centimeter perpendicular to the direction of the Sun.[1] Given that each side of the base of the Great Pyramid of Giza is 230.4 meters long, that means it's 5,308,416 cm^2; if the Sun is directly overhead, that means something like: 5,308,416 x 6.5x10^10 / 10^12 = 345,047.04 345,047.04 trillion neutrinos would be passing through the pyramid every second. The problem is detecting them.[2] [1] https://en.wikipedia.org/wiki/Neutrino https://en.wikipedia.org/wiki/Neutrino [2] https://en.wikipedia.org/wiki/Neutrino_detector https://en.wikipedia.org/wiki/Neutrino_detector
- LeifCarrotson 9y ago
  The sun is a diffuse emitter. It blankets the entire pyramid in neutrinos. What OP is proposing, I think, is a mobile point emitter and mobile detector. Move these around the pyramid and you can create an array of lines that determine the density through the pyramid on that axis. Rotate the entire setup around the pyramid to generate intersecting lines, and you could build up a map. Of course, the pyramid is also moving around the sun, so you do have a distant point source of neutrinos, but not a very consistent or convenient one. And, of course, the detectors are really difficult. Not exactly something you can hang from a quadcopter and fly around the pyramid... :)
Ancalagon 9y ago
How would you detect all of those hard-to-detect neutrinos? :)
ebosi 9y ago
A study using essentially your idea was published in Nature recently: https://www.nature.com/news/cosmic-ray-particles-reveal-secret-chamber-in-egypt-s-great-pyramid-1.22939 https://www.nature.com/news/cosmic-ray-particles-reveal-secr... They found a previously unknown 30-meter void inside the Great Pyramid.
- robin_reala 9y ago
  Yep, muon tomography is a thing. Scientists also use them to visualise this interiors of volcanos (for example). https://en.wikipedia.org/wiki/Muon_tomography https://en.wikipedia.org/wiki/Muon_tomography
rdtsc 9y ago
We have a neutron scanning devices. They can be used to detect flaws in concrete for example. Powerful neutron sources are not to played around with though. Here is a 50 ton shipping cask for 1g! of Ca-252 https://en.m.wikipedia.org/wiki/File:CfShield.JPG https://en.m.wikipedia.org/wiki/File:CfShield.JPG
- ridgeguy 9y ago
  neutron ≠ neutrino
  - rdtsc 9y ago
    Yeah I know, sorry didn't make it clear. I was talking about neutrons. Neutrino detectors are not easy to build.

Cyphase 9y ago

The Sun is already bombarding everything with trillions and trillions of neutrinos. > In the vicinity of the Earth, about 65 billion (6.5×10^10) solar neutrinos per second pass through every square centimeter perpendicular to the direction of the Sun.[1] Given that each side of the base of the Great Pyramid of Giza is 230.4 meters long, that means it's 5,308,416 cm^2; if the Sun is directly overhead, that means something like: 5,308,416 x 6.5x10^10 / 10^12 = 345,047.04 345,047.04 trillion neutrinos would be passing through the pyramid every second. The problem is detecting them.[2] [1] https://en.wikipedia.org/wiki/Neutrino https://en.wikipedia.org/wiki/Neutrino [2] https://en.wikipedia.org/wiki/Neutrino_detector https://en.wikipedia.org/wiki/Neutrino_detector

LeifCarrotson 9y ago
The sun is a diffuse emitter. It blankets the entire pyramid in neutrinos. What OP is proposing, I think, is a mobile point emitter and mobile detector. Move these around the pyramid and you can create an array of lines that determine the density through the pyramid on that axis. Rotate the entire setup around the pyramid to generate intersecting lines, and you could build up a map. Of course, the pyramid is also moving around the sun, so you do have a distant point source of neutrinos, but not a very consistent or convenient one. And, of course, the detectors are really difficult. Not exactly something you can hang from a quadcopter and fly around the pyramid... :)

Ancalagon 9y ago

How would you detect all of those hard-to-detect neutrinos? :)

ebosi 9y ago

A study using essentially your idea was published in Nature recently: https://www.nature.com/news/cosmic-ray-particles-reveal-secret-chamber-in-egypt-s-great-pyramid-1.22939 https://www.nature.com/news/cosmic-ray-particles-reveal-secr... They found a previously unknown 30-meter void inside the Great Pyramid.

robin_reala 9y ago
Yep, muon tomography is a thing. Scientists also use them to visualise this interiors of volcanos (for example). https://en.wikipedia.org/wiki/Muon_tomography https://en.wikipedia.org/wiki/Muon_tomography

rdtsc 9y ago

We have a neutron scanning devices. They can be used to detect flaws in concrete for example. Powerful neutron sources are not to played around with though. Here is a 50 ton shipping cask for 1g! of Ca-252 https://en.m.wikipedia.org/wiki/File:CfShield.JPG https://en.m.wikipedia.org/wiki/File:CfShield.JPG

ridgeguy 9y ago
neutron ≠ neutrino
- rdtsc 9y ago
  Yeah I know, sorry didn't make it clear. I was talking about neutrons. Neutrino detectors are not easy to build.