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cacsphysics / BMC_NOTES

Analysis notes related to the Bryn Mawr Experiment (BMX)
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Power Spectra of Current and Discharge Voltages #1

Open cacsphysics opened 2 years ago

cacsphysics commented 2 years ago

Interested in looking at the FFTs of the current profiles and the voltage profiles.

Could there be EMP contamination with the magnetic signals? I do not believe it would. So how would I check? The current fluctuates radially and this fluctuations could emit EMPs, I say EMPs but I am thinking about EM waves, at similar frequencies. The symmetry of the system is cylindrical and this implies Bessel functions. The Bessel functions are ugly, but behave asymptotically as sinusoidal functions. This means, if there is contamination in the Bdot probes then it is best to determine this at the furthest probe. Where the first test would be to check the FFTs of both and find a common mode.

cacsphysics commented 2 years ago

This PDF talks about the FFT (DFT) in application way. The manuscript also discusses the proper normalization. This particularly important if one wants to compare across different sized Power spectra or power spectral densities.

cacsphysics commented 2 years ago

The FFTs of the voltage profiles could identify the alfvenic sources of the turbulence.