In the case of Neon NeNe, Z=10 and density 0.0008999gcm−3,
r=vboom2πf=3.43542πf∗densityZ
f=280.73Hz
r=3.43542π∗280.73∗0.899910
r=1.753∗10−4m
by itself too small for easy manufacture.
For n=1000,
r=0.1753m
a torus with a Neon gas channel of radius 17.53cm that has 2000 contact points to draws T− particles along its circular length. These will be very fine contact points.
Goodnight.