Emp

[CosmicFarmer]

Hello everyone!

This thread will discuss everything about EMP and how to survive a weaponized EMP over your nation.

Watching Youtube link on Future Weapons TV show has shown me a few things.
YouTube - Future weapons: EMP Bomb

First off cars hit by an emp will not be able to run engines, but windows and battery will retain charge.

What this tells me is inductors, such as motors, will not short horribly and blow. Also, batteries retain their charge. I'm not sure on this third point but some DC motors require a transistor to alternate the current to the motor to produce a rotation, so some transistors will still function. I'm not sure how the cars window motor in that video was made, maybe someone can enlighten me.

LEDs might still work, same with neons, and possibly incandescents too.

Capacitors might need to be reformed. I am absolutely unsure on caps.

However micro circuits such as 555 timers, opto isolators and smaller most likely will fry due to their sensitive nature.

Mechanical switches will still function.

So that leads me to believe that bedini SSGs will for the most part be immune, or not destroyed by electronic pulses, because that is what they are for.

Thinking more, a component attached to a circuit would use the circuit as an antenna to pick up more EM from the pulse, possibly frying parts that I would have previously thought un-fryable, due to the collected charge. So parts put in circuits might fail while parts still in the box might still work.

Thinking further, anything and I mean anything attached to the "grid" would most likely REALLY fry due to the antenna nature of the power lines, and the charge already in the lines. Im not sure if the power in the lines already would be amplified or what, but I know it wouldn't help. Fans might smoke and blow their inductors, where the car example didn't fry the window's motor.

The point of this thread is to get other people's ideas on which of these circuits we are playing with would fry and which ones would still work.

I believe the SEC and the bedini non-555 timer circuits would work, possibly even aromaz radiant and possibly even gray tube... Maybe have to replace transistor, but I don't think many watergas systems would survive due to the 555's or other pulse controllers. A solid state tesla coil might fry while a mechanically switched one might still work.

Also, how many layers of magnetic shielding do you think is needed to protect hard drive data from scrambling? All the videos I have seen of successful magnetic shielding usually involves 3 or more wraps.

I just don't want to be part of the "predicted" 90% of people who die to not having electronics... that number seems inflated to me...

Any one else have any thoughts on what would survive?

[sigzidfit]

Duck and cover.

Put the thing you want to protect inside a wooden box. Put the wooden box inside a sealed metal container. A heavy steel desk with drawers and a cabinet might suffice and there's a space you can crawl in to if the ceiling is coming down.

[DrStiffler]

Put the thing you want to protect inside a wooden box. Put the wooden box inside a sealed metal container. A heavy steel desk with drawers and a cabinet might suffice and there's a space you can crawl in to if the ceiling is coming down.

@All

I have a bit of speculation to add here as EMP generators are a favorite of mine.

Why does the military and covert agencies spend so much of our money on EMP hardening of electronics they deem critical? Well I think its because we would not have a warning! If the gear is not hardened (and then its a crap shoot) you will not have time to warp everything in foil.

Now what happens with the Scalar portion of the radiation? That foil or metal box is like a bullet through butter.

Our poor body just does not like ionizing radiation, in fact its not overly happy with the non-ionizing type. Scalar is a strange animal as it can cause effects that do not correlate to the first two, although with the first two, guess its better than the double whammy.

Our society has far exceeded our ability for protection should the bottom fall out. Our best bet is to circumvent such an occurrence, how I have no idea, well I do but its not politically correct.

[morpher44]

re: protect hard drive

Backups are good ... and you might consider not only having redundant disk systems, but to also write data to an optically written media.

I wonder if there is a business opportunity for hardened data deep underground in caves?

As nanotechnology improves, perhaps data could be written
to 3 dimensional crystal structures in a write-only -- indestructible --
buckyball made from unubtanium.

[sucahyo]

From wiki:
Effects of nuclear explosions - Wikipedia, the free encyclopedia

Gamma rays from a nuclear explosion produce high energy electrons through Compton scattering. These electrons are captured in the Earth's magnetic field, at altitudes between twenty and forty kilometers, where they resonate. The oscillating electric current produces a coherent electromagnetic pulse (EMP) which lasts about one millisecond. Secondary effects may last for more than a second.

The pulse is powerful enough to cause long metal objects (such as cables) to act as antennas and generate high voltages when the pulse passes. These voltages, and the associated high currents, can destroy unshielded electronics and even many wires. There are no known biological effects of EMP. The ionized air also disrupts radio traffic that would normally bounce off the ionosphere.

One can shield electronics by wrapping them completely in conductive mesh, or any other form of Faraday cage. Of course radios cannot operate when shielded, because broadcast radio waves cannot reach them.

Maybe it is initially high current wave where after charging any wire, the coil collapse current add high voltage part to the wave. Maybe protection diode will save the circuit connected to rather long wire.

I think most semi conductor would be destroyed, this include 555, MOSFET, transistor and diode.

A computer usually inside a faraday cage if all it's body are metal. And while the disc of the harddisk is protected from EMP, the electronic controller do not.

Anyone with aerial antenna would receive more damage. Maybe anyone with earth ground too.

Mercury has good property of deflecting wave. Maybe putting semi conductor on a case made from mirror would protect it too.

For detail implementation of EMP protection see:
http://140.194.76.129/publications/a...m5-690/c-5.pdf
and also
http://140.194.76.129/publications/a...m5-690/c-4.pdf
you can also download c-1 trough c-7.

Important point from c-5.pdf:

a. EMP induced currents. The currents induced on long straight overhead lines parallel to the Earth's surface by EMP-like events have been analyzed thoroughly. If the line is over a perfectly conducting ground plane, the current has a waveform similar to the EMP early-time waveform, except for a slightly longer risetime for lines more than a few feet high. For imperfectly conducting ground, such as soil, the imperfect reflection of the wave from the ground allows the line to be driven more strongly and for a longer time than if the ground were a good conductor.

b. Effects on long buried lines. In long buried lines imperfectly conducting soil does not completely reflect the incident field; some of the incident wave is transmitted into the soil. This field in the soil can induce current in underground cables, pipes, and other conductors. However, because the velocity of propagation of a wave is much less in soil than in air, the bow-wave effect is almost negligible on buried conductors. Furthermore, the attenuation on buried conductors is greater than on overhead lines because of the proximity of the soil to the buried conductor.

c. Effects on conductors in contact with the soil. For conductors in contact with the soil (i. e., buried bare conductor), the current at any observation point is determined primarily by coupling within one skindepth of the observation point. Current induced at points farther away is so strongly attenuated by the soil that it adds little to the total current at the observation point.

d. Effects on vertical structures. The EMP interacts with vertical structures, such as radio towers, waveguides, and cables to overhead antennas, and downleads from power and communication lines in much the same manner as it interacts with horizontal lines, except that it is the vertical component of the electric field that drives the vertical structures.

e. Effects on closed shields. The EMP fields incident on a closed shield induces surface currents and charge displacements on the outer surfaces of the shield. If the shield is continuous metal (i. e., it has no opening or discontinuities in its surface) and about 1 mm thick, voltage is induced in circuits inside the shield by these surface currents.

f. Effects on insulated penetrating conductors. Conductors, such as power and signal wires, that pass through the shield may allow very large currents and voltages to be delivered to internal circuits. The current on the wire just inside the shield is about equal to the current just outside the shield; the wire is a hole in the shield or, in other words, a 0 decibel (dB) compromise of the shield. A major concern for EMP interaction is the penetrating conductor that can guide EMP-induced waves through shield walls. The shield is effective in excluding the incident EM waves, but it has little effect on the waves guided through it on insulated penetrating conductors.

g. Effects on apertures in shield surfaces. Apertures in the shield surface allow the external EMPinduced fields to penetrate through the shield and interact with internal wiring or other conductors. The external electric field associated with the surface charge density can induce charge on internal cables. The external magnetic, field which has the same magnitude as the surface current density can penetrate through the aperture to link internal circuits.

h. Transient radiation effects on electronics (TREE). Another important electrical effect is known as transient radiation effects on electronics (TREE). The radiation emitted by the nuclear explosion can interact with components of electronic circuits to produce ionization or atomic displacements in the semiconductor and insulating materials. The effects range from momentary changes in conductivity to permanent changes in crystal lattices. Semi-permanent effects, such as trapped charges in insulating materials, may also occur. TREE may upset memories, produce spurious circuit responses (logic errors), drive circuits into abnormal states, or cause permanent damage. As with most other EMP forms, damage caused by TREE can also occur through secondary effects. Self-inflicted damage may be triggered by abnormal conductivity in a junction that allows stored energy to be released. In addition, one circuit may be caused to instruct another circuit or another part of the system to perform some forbidden act that destroys the circuit or even the system.

i. Effects on large networks. Protecting large networks from the EMP usually involves conservative protection of individual parts of the network in the hope that network hardness will follow from component hardness.

[CosmicFarmer]

Right. Thanks for the links and opinions!

So the problem is more then I thought. I have a 1 ply MuMetal box that I was keeping my hard disks in and I was not sure if it would work... I see that eddy currents would still serve to fry my data. If a cabinet or box was designed like transformer cores, that might minimize eddy currents, with the multiple thin layers... but I have no idea where to get one. This is why there needs to be public machine shops in every town.

Thinking about bismuth, it opposes magnetic fields.
Reading this page Chapter 1: Magnetism Shows me that taking bismuth nontoxic bird shot and melting it on the stove is an option. Possibly having a layer of bismuth in between 2 layers of magnetic shield might protect better then more and more layers of magnetic shield.

I agree with Dr.Stiffler is right about (basically) an ounce of prevention is worth more then a pound of cure. However some things happen without my consent.

Thanks again everyone for the good insights and references!