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New device invisible to magnetic fields
Defense Talk ^ | 3/24/2012 | Defense Talk

Posted on 03/24/2012 11:19:51 PM PDT by U-238

European researchers said Thursday they have created a device invisible to a static magnetic field that could have practical military and medical applications.

Fedor Gomory and colleagues in Slovakia and Spain designed a cloak for a direct current, or dc, magnetic field that is static and produced by a permanent magnet or coil carrying a direct current.

DC magnetic fields are used in MRI imaging devices, in hospitals and in security systems, such as those in airports.

The researchers' device, described in a study in Friday's edition of the journal Science, features a cylinder with two concentric layers. While the inner layer consists of a superconducting material that repels magnetic fields, the outer layer is a ferromagnetic material that attracts them.

Placed in a magnetic field, the device has no effect on the field lines, showing neither a shadow nor a reflection. So an object inside the device cannot be detected.

"There are many applications -- for some cars, ships or a submarine," said study co-author Alvaro Sanchez of the Autonomous University of Barcelona.

He told AFP the device could also be used for patients who have a pacemaker and need a MRI of a knee or other body part, so the image would not be distorted.

Because it is made from commercially available materials, as well as operating under relatively strong magnetic fields and relatively warm liquid nitrogen temperatures, the device could easily be put to practical use, according to the authors.

"For the submarine, you have to make a shell around the submarine that will make the submarine magnetically undetectable," said Sanchez.

"This could also be used to protect some (military and medical) equipment against electromagnetic disturbances."

(Excerpt) Read more at defencetalk.com ...


TOPICS: Foreign Affairs; News/Current Events; Technical
KEYWORDS: cloak; electromagnetic; magneticfield; miltech; physics; submarine

1 posted on 03/24/2012 11:19:59 PM PDT by U-238
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To: U-238

bflr


2 posted on 03/24/2012 11:22:05 PM PDT by Captain Beyond (The Hammer of the gods! (Just a cool line from a Led Zep song))
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To: U-238
DC magnetic fields are used in MRI imaging devices, in hospitals and in security systems, such as those in airports.

Placed in a magnetic field, the device has no effect on the field lines, showing neither a shadow nor a reflection. So an object inside the device cannot be detected.

Hmm.

3 posted on 03/24/2012 11:29:52 PM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: TigersEye

You have a good eye, Tigerseye


4 posted on 03/24/2012 11:32:18 PM PDT by U-238
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To: TigersEye

bkmk


5 posted on 03/24/2012 11:33:19 PM PDT by quickquiver (No, means N O.)
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To: U-238

That’s the way of technology though isn’t it? Whatever the latest defensive or offensive gizmo is it is never very long before something is made to defeat it. But the productive uses are good.


6 posted on 03/24/2012 11:41:50 PM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: U-238

What effect would this device have on nearby electronic equipment during an EMP attack? Any guesses?


7 posted on 03/24/2012 11:43:07 PM PDT by SatinDoll (No Foreign Nationals as our President!)
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To: U-238; TigersEye

Not good for trying to sneak something past security, if that is what you are thinking. Even if you could make it portable and concealable under clothing, the LN2-cooled superconductor section would be obvious to an IR scan...


8 posted on 03/24/2012 11:46:27 PM PDT by TXnMA ("Allah": Satan's current alias...)
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To: TXnMA
You just had to go an ruin that didn't you?

Here I am all dressed up with my LN2-cooled superconductor section under my overcoat and nowhere to go. ;^)

9 posted on 03/24/2012 11:49:07 PM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: TigersEye

Would this be a “cloaking device” (as in Star Trek)?


10 posted on 03/24/2012 11:55:59 PM PDT by MasterGunner01 (11)
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To: TigersEye

Would this be a “cloaking device” (as in Star Trek)?


11 posted on 03/24/2012 11:55:59 PM PDT by MasterGunner01 (11)
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To: MasterGunner01
Invisibility is a state of mind....been there a few times.


along with Witty and Charming, Rich and Powerful, Benevolent, Clairvoyant, Patriotic, Crank Up Rambo, Witty and Charming, Part II and the infamous...Bulletproof.
12 posted on 03/25/2012 12:05:18 AM PDT by Tainan (Cogito, ergo conservatus sum)
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To: MasterGunner01

It sure sounds like it.


13 posted on 03/25/2012 12:15:07 AM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: TigersEye

It sounds like only cloaking to magnetic field reading devices. Obviously not to visible light (but I think someone has come up with that to a degree?), but to magnetic sensors. I’m not sure about electromagnetic sensors - but I am guessing that it is. I would imagine that the stuff at the airports is electromagnetic (to detect all metals) and not just magnetic (iron only).


14 posted on 03/25/2012 12:29:55 AM PDT by 21twelve
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To: TigersEye

Better have your woolies between the device and your skin!


15 posted on 03/25/2012 1:50:57 AM PDT by MindBender26 (New Army SF and Ranger Slogan: Vengeance is Mine, sayeth the Lord.... but He subcontracts!)
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To: MindBender26

I made a shirt with a space blanket. ;^)


16 posted on 03/25/2012 1:53:23 AM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: TigersEye

Save your money. Recent reports are showing that a weapon concealed on the side of your body gets lost in the background shadow of those newfangled airport security scanners.


17 posted on 03/25/2012 2:04:01 AM PDT by roadcat
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To: TigersEye
Here I am all dressed up with my LN2-cooled superconductor section under my overcoat and nowhere to go. ;^) Just put it inside the box...
18 posted on 03/25/2012 2:14:57 AM PDT by Smokin' Joe (How often God must weep at humans' folly. Stand fast. God knows what He is doing)
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To: Tainan
Invisibility is a state of mind....been there a few times.

Yeah. Tequila induces that...

19 posted on 03/25/2012 2:16:13 AM PDT by Smokin' Joe (How often God must weep at humans' folly. Stand fast. God knows what He is doing)
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To: Smokin' Joe; TigersEye; TXnMA
Just put it inside the box.

Box better have some VERY good insulation or your are going to have major problems.

20 posted on 03/25/2012 4:33:50 AM PDT by Right Wing Assault (Dick Obama is more inexperienced now than he was before he was elected.)
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To: U-238

Degaussng technology has been around for 70 years.


21 posted on 03/25/2012 5:21:53 AM PDT by SampleMan (Feral Humans are the refuse of socialism.)
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To: U-238
operating under relatively strong magnetic fields and relatively warm liquid nitrogen temperatures

Compared to liquid helium, yes. In the real world, it's still close to -200 °C.

22 posted on 03/25/2012 6:30:44 AM PDT by Moltke (Always retaliate first.)
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To: TigersEye

No problem! I bet you are plenty cool under that overcoat! ;-)


23 posted on 03/25/2012 9:09:09 AM PDT by TXnMA ("Allah": Satan's current alias...)
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To: TigersEye

Ah ha!

(sounds a bit like Mormon underwear :)


24 posted on 03/25/2012 10:37:43 AM PDT by MindBender26 (New Army SF and Ranger Slogan: Vengeance is Mine, sayeth the Lord.... but He subcontracts!)
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To: roadcat

Good to know, good to know. ;-)


25 posted on 03/25/2012 8:58:52 PM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: Smokin' Joe

There is no think tank comparable to Free Republic!


26 posted on 03/25/2012 9:00:45 PM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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To: MindBender26; TXnMA
(sounds a bit like Mormon underwear :)

Sort of but more like Vulcan underwear and I'm the coolest cat in town
when I'm out and about in it.

27 posted on 03/25/2012 9:08:31 PM PDT by TigersEye (Life is about choices. Your choices. Make good ones.)
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