Holy moly it just hit me. Russia warns of EMP attack.

[rbstern]

A Faraday cage is not exclusively described by a military specification. It's a physical theory with known physical laws controlling the behavior. Just because the military likes a Faraday cage built a certain way, with specific materials, for particular, imagined scenarios, doesn't mean nothing else is a Faraday cage. Faraday cages existed even before Faraday discovered them. Ben Franklin experimented with them. He didn't understand what he was seeing, but it was the same behavior.

All of that fumbling about predates "mil-std," yet they were still Faraday cages. Go figure.

 

[JamesG]

But the military did/funded the most research on them.

 

[IMaDad]

A Faraday cage is not exclusively described by a military specification. It's a physical theory with known physical laws controlling the behavior. Just because the military likes a Faraday cage built a certain way, with specific materials, for particular, imagined scenarios, doesn't mean nothing else is a Faraday cage. Faraday cages existed even before Faraday discovered them. Ben Franklin experimented with them. He didn't understand what he was seeing, but it was the same behavior.

All of that fumbling about predates "mil-std," yet they were still Faraday cages. Go figure.

Yes. I agree with that.
Faraday cages built to protect against EMP would look much different that some on a radar site. Just like capacitors are different sizes, types, shapes, ratings, etc, faraday cages come in different shapes and sizes.
When speaking about EMP it gets very specific.

 

[rbstern]

Nuclear EMPs have a very long wavelength. Their primary destructive force is against conductors that are very large, geographically. Things connected to the electrical grid are vulnerable to that type of EMP, because of the amplification that takes place over the long distance of the grid conductors. Telephone and coax type cable lines are similarly vulnerable, but many of those are now fiber optic, which limits the geographic amplification potential.

Something inside a well sealed, small metal Faraday cage, without any connection to the grid, isn't going to be impacted by a nuke's EMP. The wavelength of the EMP pulse is simply too large to penetrate the small openings of something like a gun safe. It's effective shielding against that type of EMP.

 

[IMaDad]

You're thinking of an E3 Emp wavelength like from the sun, and not an E1 heavy nuclear weapons.

You should actually do research before proclaiming your limited understanding of a subject as gospel, Racist.

 

[Gimmeguns]

Nuclear weapons have all three levels if detonated at altitude (Look up HEMP, no not the natural fiber kind)

 

[Gimmeguns]

Jerry Emanuelson wrote a paper that explains it in detail and layman's terms

 

[rbstern]

You're thinking of an E3 Emp wavelength like from the sun, and not an E1 heavy nuclear weapons.

The effects of prompt, E1 EMP on ICs cannot be calculated directly without knowledge of the details of the particular electronic system set-up. An E1 pulse acts on an electronic system by inducing surges in the interconnections (cables, wires, inductors, etc.), which arrive at input, output, and power-supply terminals of solid-state components to cause transient and/or permanent failures. When applied to solid-state parts, a nuclear EMP can be considered a quasi-static field because most of the EMP energy is carried by the spectral components below 108 Hz, which corresponds to a wavelength of about 3 m. Investigations have shown that the direct effects of such a field are negligible for most purposes if its electric and magnetic components are less than 100 kV/m and 600 A/m, respectively.

The Space Review: The EMP threat: fact, fiction, and response (part 1) (page 2)

3m wavelength is not going to penetrate any reasonable metal shell that works as a Faraday cage. A gun safe? The wave length would have to be a no more than a few centimeters to even have a chance of interacting with any pre-drilled openings that aren't occupied by bolts or other hardware.

You should actually do research before proclaiming your limited understanding of a subject as gospel, Racist.

What it in the world does that mean?

 

[Theodore]

EMP attack hits, I'm becoming mayor

 

[IMaDad]

The effects of prompt, E1 EMP on ICs cannot be calculated directly without knowledge of the details of the particular electronic system set-up. An E1 pulse acts on an electronic system by inducing surges in the interconnections (cables, wires, inductors, etc.), which arrive at input, output, and power-supply terminals of solid-state components to cause transient and/or permanent failures. When applied to solid-state parts, a nuclear EMP can be considered a quasi-static field because most of the EMP energy is carried by the spectral components below 108 Hz, which corresponds to a wavelength of about 3 m. Investigations have shown that the direct effects of such a field are negligible for most purposes if its electric and magnetic components are less than 100 kV/m and 600 A/m, respectively.

The Space Review: The EMP threat: fact, fiction, and response (part 1) (page 2)

3m wavelength is not going to penetrate any reasonable metal shell that works as a Faraday cage. A gun safe? The wave length would have to be a no more than a few centimeters to even have a chance of interacting with any pre-drilled openings that aren't occupied by bolts or other hardware.



What it in the world does that mean?

space review huh? that couldnt be focused on space/solar could it?

It means use science. Look man I'm not sure why you are so intent on trying to say I and the military are wrong on EMP/Faraday cages, but its getting old.
Have you even read the MIL-STD I posted, or are you just arguing for fun?

Here is one page of very many in there:

Notice the frequency on the X-axis. That axis goes to 0.00002998 meters. Thats 0.001180315 inches.
this isnt the end-all part of the handbook through. Lots of signals penetrate steel, or gun safes, etc. They have specific requirements for a reason.
you want to tell people that a steel safe is fine, go for it.
I'll point them to actual data and requirements used by the military.
They can pick.

Racist.