Bubble chamber image of charged particles being deflected by a magnetic field (CERN)

Physics, Space Flight

Ion Shield for Interplanetary Spaceships Now a Reality

4 Nov , 2008 by

[/caption]British scientists invent “mini-magnetosphere” to protect astronauts during solar storms.

Space travel during a solar storm just became a little less risky. UK scientists working at Rutherford Appleton Laboratory near Oxford and the universities of York and Strathclyde have tested a “mini-magnetosphere” enveloping a model spacecraft in the lab. It turns out that their prototype offers almost total protection against high energy solar particles. By mimicking the natural protective environment of the Earth, the researchers have scaled the protective magnetic bubble down into an energy efficient, yet powerful deflector shield.

This astounding achievement is a big step toward protecting sensitive electronics and the delicate human body against the radioactive effects of manned missions between the planets. It may sound like science fiction, but future astronauts may well shout the order to “RAISE SHIELDS!” if the Sun flares up during a 36 million mile journey to Mars…

A mission to Mars will benefit from a mini-magnetosphere (NASA)

A mission to Mars will benefit from a mini-magnetosphere (NASA)

On writing “Scientists Designing ‘Ion Shield’ To Protect Astronauts From Solar Wind” way back in January, I was a little dubious as to whether the preliminary results could be replicated on a full-scale spaceship. At the time, Dr Ruth Bamford (the lead researcher from Rutherford Appleton) had created a mini version of a magnetic shield that acted as a “bubble” in a stream of ions. As ions were charged, they could be deflected by a magnetic field, so the field acts as a barrier to deflect the paths of these ions around the void encapsulated by the magnetic field. All that had to be done was to scale the idea up a notch or two and then place a spaceship in the middle of the protected void. Solved!

Not so fast. The biggest drawback I could see back in January was the large amount of energy that would be required to power the system. After all, to generate a stable, spaceship-sized mini-magnetosphere would need a vast quantity of electricity (and be very bulky), or it would need to be highly efficient (and compact). As this is space travel we’re talking about, the scientists would need to look into the latter. The mini-magnetosphere would need to be a highly efficient device.

The USS Enterprise has many uses for its deflector shields, including repelling the Borg (Paramount Pictures)

The USS Enterprise has many uses for its deflector shields, including repelling the Borg (Paramount Pictures)

Eleven months later and it looks like the British team have found their answer. In results just published in the journal Plasma Physics and Controlled Fusion, they have devised a system no bigger than a large desk that uses the same energy as an electric kettle. Two mini-magnetospheres will be contained within two mini satellites located outside the spaceship. Should there be an increase in solar wind flux, or an approaching cloud of energetic particles from a flare and/or coronal mass ejection (CME), the magnetospheres can be switched on and the solar ions are deflected away from the spacecraft.

These initial experiments have shown promise and that it may be possible to shield astronauts from deadly space weather,” Dr Bamford said. After all, the effects of radiation poisoning can be devastating.

Prof. Bob Bingham, a theoretical physicist at the University of Strathclyde, gives a graphic account as to why this technology is important:

Solar storms or winds are one of the greatest dangers of deep space travel. If you got hit by one not only would it take out the electronics of a ship but the astronauts would soon take on the appearance of an overcooked pizza. It would be a bit like being near the Hiroshima blast. Your skin would blister, hair and teeth fall out and before long your internal organs would fail. It is not a very nice way to go. This system creates a Magnetic Field Bubble that would deflect the dangerous radiation away from the spacecraft.” – Prof. Bob Bingham

Bingham added that the team was currently patenting the technology and hopes to have a working full size prototype within five years. So we might have to wait some time until we see some pictures of the system in action

Source: Telegraph (UK)


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Sci-Fi Si
Guest
November 4, 2008 2:20 AM

Very cool.

mrt181
Guest
mrt181
November 4, 2008 3:16 AM

Hmm, deflect radiation. Maybe energy shields that can protect against a nuclear blast are no longer pure scifi but theoretically possible. Whoever gets this first will win a global thermonuclear war, no more tic-tac-toe

ntoskrnl
Guest
ntoskrnl
November 4, 2008 5:01 AM

I’m sure they’re only talking about charged particles here (which would already be a huge step forward). Gamma rays or neutral particles can’t be deflected by magnetic fields.

Mark - ISP Review
Guest
November 4, 2008 5:24 AM

I wonder if this technology could also be adapted for use in experimental Nuclear Fusion power stations to shield the chamber walls against corrosion. That would make them commercially viable, for a change.

baley
Guest
baley
November 4, 2008 5:36 AM

@Mark

This is what is in use for nuclear fusion reactors ( super conductors magnets)

@mrt181
this is only for charged particles Gamma rays and neutral particles cannot only be absorbed by a the spaceship structure.

neil
Member
neil
November 4, 2008 6:51 AM

now all we need is a spacecraft that’s worth a s***. NASA? anyone?

NoAstronomer
Member
NoAstronomer
November 4, 2008 7:34 AM

Is there any potential application for orbiting (unmanned) satellites to protect them from solar flares?

Dark Gnat
Member
Dark Gnat
November 4, 2008 8:51 AM

I’ve been hoping for something like this for a long time, and I knew it was feasible.
This is very exciting.

Kurt Fitzner
Guest
November 4, 2008 12:09 PM

While the article does mention the similarity in the effects of a solar event and nuclear radiation on a human, they have vastly different causes. No sort of electromagnetic shielding can keep out nuclear radiation simply because of the fact that neutron particle radiation has no electromagnetic charge. It passes through a magnetic field like it’s not there.

So while this is an exciting discovery, it has no effect in a traditional nuclear/radiological environment.

watchful stone guardian
Guest
watchful stone guardian
November 4, 2008 12:39 PM

“they have devised a system no bigger than a large desk that uses the same energy as an electric kettle.”

Future British astronauts will now be faced with a terrible dilemma… raise the shields or plug in the kettle for a cuppa. That’ll be a tough call!

Damian
Guest
Damian
November 4, 2008 1:39 PM

“they have devised a system no bigger than a large desk”

How large a desk are we talking here?

luke carter
Guest
November 4, 2008 3:15 PM

cool. i can imagine this being used for moon stations as well.

Astrofiend
Member
Astrofiend
November 4, 2008 4:11 PM

Good work… and me thinks they’ll have a long time to perfect the technology before we start sending people into interplanetary space… Similar technology could also be highly useful for permanent moon bases and the like too.

The Occupant
Member
The Occupant
November 4, 2008 11:15 PM

This makes me very happy, Mars, though still an extremely difficult challenge, is starting to look human doable again.
Cheers guys, you have made me dream again!

Chuck Lam
Guest
Chuck Lam
November 5, 2008 7:56 AM

I suspect the radiation challenge will be fairly easy to deal with. The real problem, as I see it, will be to protect the space vehicle from destruction running into unknown space debris. For example, I don’t believe there is any way to avoid destruction traveling ten or more miles per second running into a baseball size chunk of something solid.

Hans-Peter Dollhopf
Member
Hans-Peter Dollhopf
November 5, 2008 2:48 AM
What funds do Dr Bamford and the Rutherford Appleton Laboratory have? Having a working full size prototype within five years is too late. I guess that NASA’s Orion crew exploration vehicle would need partial redesign to integrate the shield device. And in five years it would presumably be too late for changes. The speed of realisation depends on money. Public money is devoured by the fight against the impact of the financial crisis. And due to the disastrous financial situation of research in Britain I wonder that they made it so far at all. Presumably, we will have to wait for many years before we will see real progress. The war chests of science are empty. And then… Read more »
Sakib
Guest
November 5, 2008 3:26 AM

I think 5 years is quite feasible, at least it will be tested and optimised rather than being rushed. It’d be cool if we could have a planetary shield for Earth!

Paul Eaton-Jones
Member
November 5, 2008 3:27 AM
Here in Britain ‘big science’ has always been a long way behind other countries and science like this is right at the back of the queue. It’s usually down to the ingenuity of the scientists concerned that gets it done. Even though Beagle 2 ultimately failed, because the project was done on a shoestring, the team strove like heroes to get it to Mars. The problem in Britain lies with the fact that government departments are usually run by ministers who have either no interest in the portfolio or they have no qualifications or experience in the ministry. We’ve had people with degrees in classics/English running the science department; historians running the economy; economists running education etc. etc.… Read more »
Dan
Guest
Dan
November 5, 2008 7:03 AM

Won’t the magnetic field adversly effect electronic and other equipment on board ship?

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