Hi,
Question # 1:
I am trying to measure the magnetic field in Tesla or guass ( 1 tesla = 10,000 guass) created by helmholtz coils. The magnetic field frequency is between 75 to 100KHz. The area that I am trying to measure the field in is 19" long x 10 inches wide and 12 inches high.
I came across two options and I need to know which is the best way to go and why?
Option A : Magnetic Sensor
This sensor can give magnetic field in three axes. I calculated that
1mV / V / gauss x 400 = 1.32 V / guassOption B: One turn loop coil.
I made a 1" diameter loop from a 12 AWG wire with the electric shielding. Connect a BNC at the end of the loop and monitor the peak to peak voltage with the oscilloscope.
I found the option B in the following paper ( page 7)
Questions # 2:
Currently I am using a coil that I made by myself using a 36 AWG wire ( 18 turns , 1.1 diameter, 12u H, 24 strands, core : air ) with a capacitor in parallel. This LC circuit is resonating at 100KHz. When I put this LC circuit in the magentic field, the peak to peak output is between 30 to 40 volts. Currently the coil weighs 6 grams. I want the coil size to be smaller and its weight to be lighter. But want the same inductance and output voltage across it.
I am wondering that
A. Is it possible that this coil can be made on the printed circuit board? That might reduce the weight of the coil. B. If yes than will it be as effective as the coil that I mentioned above? I meant its relationship the magnetic field. C. Can anyone suggest any online calculator or formula to do this on PCB?
Thanks jess