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  • Users: Todd619
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  1. Todd619

    Help with electromagnet flux/field calcs

    I'm designing an electromagnet and found the thread "Designing a simple elctromagnet and need help" very helpful, especially UKpete's formula tutorial. I've been playing around with those formulas, but I would like to try to refine the calculations and try to get the calculations as accurate as...
  2. Todd619

    HIGH KV / mm INSULATION

    I am searching for insulator materials with the highest dielectric strength per thickness possible. The best ones I've found seem to be Teflon @ about 40-80 kV / mm (short time) and CPVC @ about 40 kV / mm (short time). My problem is that all the values I find say "short time", but this is not...
  3. Todd619

    FLUX FOCUSING WITH POLE PIECE

    I'm working on a design for a magnetic dipole with a steel yoke, most likely using permanent neodymium magnets. My goal is to achieve the highest field possible across a gap over a certain minimum area, with an emphasis on uniformity of the field over this area. My question is if I use a cone...
  4. Todd619

    cyclotron radiation

    I'm having trouble finding a formula for energy loss of a single particle after one revolution in a cyclotron due to cyclotron radiation. Can anyone help? Thanks -Todd
  5. Todd619

    Limit to square wave output frequency?

    I'm by trade a structural guy but I want to build a small cyclotron as a hobby project using rare earth permanent magnets. I want to use off the shelf RF equipment to produce the ion excitation and I'm wondering if it's easy or even possible to produce a square wave output at 10-20 MHz? It seems...
  6. Todd619

    Field strength vs. gap between poles

    I have a question about how the distance between a north and south pole effects the field strength at a point equidistant from each pole face. My college physics book seems to treat it as if it will not change with distance if the faces are infinitely large planes. Visualizing this, as long as...
  7. Todd619

    Array of PMs on pole piece to= large PM?

    Is it possible to attach several permanent magnets to one side of piece of iron or other magnetically conductive material to get a highly uniform mag. field on the other side?

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