Recent content by kroovstein

  1. K

    Air cooled coil electromagnet ?

    Thanks. First - about the uniformity, I need the chamber to be 4cm in diameter and the coil should be 60cm long (or two coils of 30cm each with a slit between them), so this will provide me with a certain uniformity that I believe is satisfactory for my needs. (the length is >> than the...
  2. K

    Air cooled coil electromagnet ?

    Air cooled coil electromagnet ? Hi. I'm a (very) Junior researcher I'm trying to biuld a solenoid electromagnet (air bore, not metal), But I need it in a specific size and most important I have to have it AIR COOLED (by fan or compressed air). Does anybody know if such an electromagnet...
  3. K

    Stress-Energy Tensor from Lagrangian: Technical Question

    can you please explain why when you derive the root of the determinant of the metric, you don't get the inversed root as a factor, but the root itself? isn't the 1/2 factor a result of the chain rule? thank you.
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