That is exactly right - 24 V is for biasing the 0.1 nF capacitor, and it is actually the first sensor that collects some electrons, and then it is fed to the reverse-biased diode for “avalanche amplification”.
Is the drawing below correct? Do you mind explaining this a bit more - which/how the voltage is giving the inductance and how it can be canceled by the shunt capacitor? and how I should calculate the value of that shunt capacitor.
Thank you!
Xiaheng