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I need help in detecting the passage of a bullet from a wire ring

I need help in detecting the passage of a bullet from a wire ring
I do not have information about this, but I want to identify the passage of the beam from a 22-inch diagonal wire ring.
The sampling rate of the coil must be higher than 40 Mhz to detect the presence or absence of the beam
Is there a reference to help me do that?
Do you know the sample?