How can I create a 1Telsa uniform magnetic field?

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Discussion Overview

The discussion revolves around creating a uniform magnetic field of at least 1 Tesla for experimental purposes. Participants explore practical methods for generating such a field, including purchasing equipment or manufacturing it themselves. The conversation touches on various applications and considerations related to the strength and uniformity of the magnetic field.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the type of experiment requiring a 1 Tesla field and the volume and uniformity needed.
  • Another suggests using a 1000 turn solenoid with high current to achieve the desired field strength, though this may not be practical for all users.
  • A participant mentions the use of expensive equipment found in hospitals for NMR imaging or magnets in particle accelerators as potential sources for generating the magnetic field.
  • One participant discusses the formula for calculating magnetic fields in solenoids and expresses doubt about achieving high current levels but believes a fraction may be feasible.
  • Another participant recommends a water-cooled resistive magnet and notes the potential expense, while also mentioning the availability of superconducting magnets in physics labs, which may not allow for adjustable field strength.
  • A geologist seeks assistance in manufacturing a magnetic field for detaching metallic minerals, indicating a different application of the magnetic field.
  • One participant shares their experience with various magnets, suggesting that the required volume of the magnetic field is critical in determining the appropriate type of magnet, and discusses the feasibility of using permanent magnets or superconducting magnets based on volume requirements.

Areas of Agreement / Disagreement

Participants express a range of views on the methods and equipment for generating a 1 Tesla magnetic field, with no consensus reached on the best approach. Different applications and requirements lead to varied suggestions and considerations.

Contextual Notes

Participants mention various factors such as the volume of the magnetic field, the need for uniformity, and the practicality of achieving high current levels, indicating that assumptions about these factors may affect the proposed solutions.

robert135
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I am working on an experiment with a relatively high powered uniform magnetic field... and need to get at least 1 Tesla for it to work.

I am familiar with the theories around how these fields can be created, but am curious if in practical application how one would do it.

Is there a place I can purchase this style equipment?

Is there a way I can manufacture this field myself?

Thanks for any thoughts you might have.
 
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1 tesla is pretty large. what sort of experiment is it?

you can take a 1000 turn solenoid and pump 796 amps through it! :-p :devil: :smile:
 
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Welcome to Physics Forums robert135 and dtang0!

How large is the volume in which you need the field? How uniform? Over what time period do you need this field?

Some suggestions: 1) those expensive things some modern hospitals have, to do NMR imaging; 2) the magnets they use in big particle accelerators, to keep the beams going round the racetrack, or to generate synchrotron radiation.
 
If I used a solenoid as far as I can remember the Formula is MU s-zero * N * I
and Mu s-zero is pretty darn small...

I know only so much about how to step up amps.. and while I doubt I could pull off 700+ amps, I could pull off a fraction of that I believe rather easily.

I am trying to test reactions on various objects placed within a large magnetic field. I The volume of area needed would be around 4 inches cubed. That would at least allow me to work with enough space to get stuff in the field.
 
Nereid said:
Welcome to Physics Forums robert135 and dtang0!

thanks! I am already enjoying my stay!
 
You need a water cooled resistive magnet. I think it is kind of expensive if you want to have it at home.You may check price for a used equipment.
Otherwise , NMR superconducting magnets in physics labs are sometimes idling, and they have very large bore. The problem here is that they will not allow you to change the field strength.
 
Hi robert
excuse me
I am a geologist and I am going to manufacture magnetic field fordetachment metalic minrals , so I and some my friend want to make this field by one machine.
can you help me?
tank you...
 
I have worked with many types of magnets. Critical is the volume of the required field. If it is just a few mm^3 you may get away with a permanent magnet with a focusing pole piece. If you need more like some cm^3 we're talking about electromagnets, power hungry, big, unstable. If you need cm3 to dm3 only supeconducting magnets are sensible. It is rather attractive to buy a second hand superconducting NMR specrometer and tune the field down to the required range. You need to be used to handling liquid helium and nitrogen though. The spectrometers can be adjusted ("shimmed") to ppb homogeneity. Homogeneity is also an important factor. If you give some info on volumes I can tell you more about this.
 

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