Can you fill an entire room with a strong magnetic field using current technology?
I had an idea, but it will only work if an entire room is filled with a magnetic field. I plan on doing this idea within 30 or so years, so you can take you time answering.
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Yes. Modern particle physics detectors are much larger than "rooms" (the ATLAS detector at the LHC is about 50 meters high), and they use highly uniform multi-tesla fields for tracking charged particles. If you have a few million dollars, you could build an equivalent solenoid around your house. The neighbors (not to mention your family) might complain about their lack of TV and cell phone reception, erased hard disks and credit cards, and so on.
Mar 7, 2009. 12:38 PMThe Mollusk (author)
says:
Do you think the price will go down in the next 20-30 years?
That is doubtful. The price of something is normally reduced as it comes into more common use and is then mass produced. It is really not very feasible that there will be any need to mass produce these...
Oct 8, 2009. 4:54 PMJCO72
says:
We had a cop investigating an alarm at a MRI facility in town. He ignored the warning signs, then got his hand pinned between his pistol and the machine. His partner got stuck to it too. Since their radios were incapacitated, his partner had to slip out of his gunbelt (the buckle was pinned to the machine) and use the car radio. The first cop broke a couple of knuckles, and the gun was permanently magnetized
MRI scanners produce fields so strong that magnetic materials must not be brought into the room.
30 second video
15 minute safety video
30 second video
15 minute safety video
Mar 6, 2009. 6:43 AMPutzer
says:
A big enough neodymium magnet will fill a room. I think a 3x3" disk will pull metallic objects in from a three foot radius and disrupt CRT screens maybe 14 feet away? Careful though because they can easily break bones and rip a pacemaker out of your chest or anyone else's.
Mar 5, 2009. 8:14 PMNobodyInParticular
says:
How about sharing the idea? (It's not likely that, after 30 years, none of the other seven billion or so people on the planet will have come up with a similar idea.) Perhaps someone here can explain what to study, or why you need a different idea.
For starters, I would suggest reading about magnetic levitation. Yes, magnetism might be a lot cooler without Earnshaw's Theorem messing up everybody's great ideas for magnetic gadgets.
But notice those exceptions to it. Examples of using a feedback controller or diamagetism to get around it can be found on Instructables. Then there's the ever-popular cheat of using strings or barriers.
Some especially powerful electromagnets are found in MRI machines (this one is just on standby power!) and research labs.
If you would like to experiment with large permanent magnets, especially of the neodymium type, be sure to look around for a good deal- there are many many rip-offs out there. K&J Magnetics has some reasonably-priced items, as do some of the Ebay sellers who have cheap Chinese knock-offs and readily admit that that's what they sell. Before deciding on any purchase, always calculate the unit price, like dollars per cubic inch of magnet. Like at the grocery store, the bigger ones are usually (but not always) the better deal.
(total price + shipping) / (number in a package) / (volume of each one)
For example
($15.20 + $5) / 2 magnets / .442 cubic inches = $22.85 per cubic inch
For starters, I would suggest reading about magnetic levitation. Yes, magnetism might be a lot cooler without Earnshaw's Theorem messing up everybody's great ideas for magnetic gadgets.
But notice those exceptions to it. Examples of using a feedback controller or diamagetism to get around it can be found on Instructables. Then there's the ever-popular cheat of using strings or barriers.
Some especially powerful electromagnets are found in MRI machines (this one is just on standby power!) and research labs.
If you would like to experiment with large permanent magnets, especially of the neodymium type, be sure to look around for a good deal- there are many many rip-offs out there. K&J Magnetics has some reasonably-priced items, as do some of the Ebay sellers who have cheap Chinese knock-offs and readily admit that that's what they sell. Before deciding on any purchase, always calculate the unit price, like dollars per cubic inch of magnet. Like at the grocery store, the bigger ones are usually (but not always) the better deal.
(total price + shipping) / (number in a package) / (volume of each one)
For example
($15.20 + $5) / 2 magnets / .442 cubic inches = $22.85 per cubic inch
. Depends on how strong strong is. Your room is already filled with all sorts of magnetic fields. Geomagnetic, fields from the house wiring, &c. The computer you are viewing this on emits a lot of EM radiation. . For a field of much strength: If you don't plan on actually doing it for another 30 years or so, I'd wait at least 25 before doing the research. Superconductors and other technology advances will likely make future high-power magnets much different than current ones.
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