Author Topic: radiation protection via emp pulse  (Read 1439 times)

Offline +energy

  • Member
  • Posts: 7
  • Liked: 0
  • Likes Given: 0
radiation protection via emp pulse
« on: 05/03/2014 04:03 AM »
I was wondering about an idea i've come up with. How feasible is it to deflect cosmic rays/ solar protons via a pulsed emp? could a space craft have some power system with  a superconducting pulsed emp generator?

Offline ChrisWilson68

  • Senior Member
  • *****
  • Posts: 3628
  • Sunnyvale, CA
  • Liked: 2214
  • Likes Given: 2808
Re: radiation protection via emp pulse
« Reply #1 on: 05/03/2014 04:52 AM »
An electromagnetic pulse won't help you.  What you need is to keep a constant magnetic field instead of a pulse.  That has been studied extensively as a way to shield against high-energy nuclei.

Offline +energy

  • Member
  • Posts: 7
  • Liked: 0
  • Likes Given: 0
Re: radiation protection via emp pulse
« Reply #2 on: 05/09/2014 03:03 AM »
An electromagnetic pulse won't help you.  What you need is to keep a constant magnetic field instead of a pulse.  That has been studied extensively as a way to shield against high-energy nuclei.

by using a temporary pulse at say 1khz(arbitrary) you could send out a much more powerful magnetic field with the material limitations of superconductors. The field would be just as strong as a large superconducting magnets but by pulsing it you could reduce the size of the magnets at least. Maybe there could be other benefits?

Offline cordwainer

  • Full Member
  • ****
  • Posts: 563
  • Liked: 19
  • Likes Given: 7
Re: radiation protection via emp pulse
« Reply #3 on: 05/09/2014 03:36 AM »
But, that's not technically a EMP pulse it's an alternating electro-magnetic field. That has already been used on the Galileo spacecraft. Also the field still has to be a permanent magnetic field if you want to keep power losses to a minimum the magnetic moment has to be maintained by fluctuating it's potential field strength you can create a strong field with less electrical energy.

An EMP pulse has to work from a negative or null field strength to a very high potential very quickly which requires a lot of energy between pulses(as well as hardware to ground the large electrical current needed, as well as heat sinks/radiators) and due to the physics necessary to make that possible and energy efficient is normally uni-directional in nature rather than omni-directional. For instance to make a really powerful EMP pulse that has a great deal of field strength and field size you have to take advantage of the soliton or resonance effect is some way which usually results in a uni-directional field.

Offline ChrisWilson68

  • Senior Member
  • *****
  • Posts: 3628
  • Sunnyvale, CA
  • Liked: 2214
  • Likes Given: 2808
Re: radiation protection via emp pulse
« Reply #4 on: 05/09/2014 03:50 AM »
An electromagnetic pulse won't help you.  What you need is to keep a constant magnetic field instead of a pulse.  That has been studied extensively as a way to shield against high-energy nuclei.
by using a temporary pulse at say 1khz(arbitrary) you could send out a much more powerful magnetic field with the material limitations of superconductors. The field would be just as strong as a large superconducting magnets but by pulsing it you could reduce the size of the magnets at least. Maybe there could be other benefits?

No.

When you need a magnetic field, you need a magnetic field.  An electromagnetic pulse doesn't give you the effect of a magnetic field.

You can think of a magnetic field as a constant flow of water in a stream.  A pulse is like dropping a big rock in a body of water.  The constant flow of water will steadily move a boat sitting on the water.  The waves from dropping a big rock in the body of water will move the boat forward then back again to where it started.

For protection from energetic nuclei, you need the constant flow to act on the nuclei over time as they approach you, bending their paths away from you.  A constant magnetic field will do that.  An EM pulse will just move the nuclei back and forth, vibrating them a bit, but not changing their general course.

Offline cordwainer

  • Full Member
  • ****
  • Posts: 563
  • Liked: 19
  • Likes Given: 7
Re: radiation protection via emp pulse
« Reply #5 on: 05/10/2014 03:33 AM »
Depends on what you consider constant Chris you can have the field vary in strength over time like an alternating electrical field as long as the field is strong enough even at it's weaker limit to effect the incoming particles. Even a series of rapid enough and strong enough pulses would act upon ionized particle with sufficient force to change their course. It's not like pushing a massive deluge of water with a constant pressure, pushing away charged particles is more like blowing air away with a fan. Charged particles that are diverted would act on other charged particles and any electromagnetic system is not going to divert all of the ionized radiation that is colliding with the field since some of those particles are too energetic to be diverted. Problem is a system of rapid emp pulses would be too energy inefficient compared to a more constant EM field. Also the most efficient method of creating EM fields would be with superconductors that are most efficient when they keep a constant field strength with little wobble in the field strength. One of the reasons for this is they have to be cooled and have a pretty constant electrical current flowing through them in many cases to even maintain superconductivity.

Tags: