Recent content by 7doughnuts

  1. 7

    Solving Impedance Mismatch with Rogowski Coil

    I'm sure there was another reply suggesting some transformer that I should look into but it seems to have gone!
  2. 7

    Solving Impedance Mismatch with Rogowski Coil

    Thanks for both of your replies, I'll look into your suggestions. It's funny how something that someone mentions in passing can consume your thoughts and distract you from what you're meant to be doing!
  3. 7

    Solving Impedance Mismatch with Rogowski Coil

    It's to measure a current pulse which is around 70ns, so GHz. I assume this will mean the integrator will need to be effectively directly coupled to the coil?! I'm sure the coax at the momnent will be in the region of a few meters in length. Since I've had a quick look into baluns and I...
  4. 7

    Solving Impedance Mismatch with Rogowski Coil

    A friend of mine is having problems with a measurement signal he is getting from a Rogowski coil. When he changes the coaxial cable length the amplitude of the signal changes. It’s been a while since I’ve studied this type of thing but to me it sounded like an impedance mismatch issue and...
  5. 7

    Can Magnetic Field Strength Decrease with Distance in Plasmas?

    Hi Can anyone tell me how magnetic field strength decreases with distance in free space? If the source was effectively a point souce in a plasma, what would the field strength be at a specific distance? Is it source field strength/4 pi r sqrd? As an example if the source was 1T, what...
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