  Schottky noise is a common term widely acknowledged by the community of
accelerators, especially of circular machines. It is referred to the incoherent
signal arising from the circulating charged particles in the accelerator. The
noise is named after W. Schottky, who first discovered a then new type of
noises in direct electric current and called it shot noise himself. Because of
this, the Schottky noise is considered as an alias for the shot noise in
accelerator literatures. But is it really so? In this essay I compare the two
noises side-by-side by formulas and argue that even though they arise from the
same discrete nature of charge carriers, the noise spectral patterns are
inherently distinct, whereby the synonymity of these two terms is questionable.
