Figure 7

(a) Recorded images from a front-view measurement at a \(V_{\textrm{AIP}}\) of \(-75\) V, P\(_{\textrm{RF}}\) of 40 W, pressure of 166.4 mTorr, and argon injection of 50 sccm. (b) Intensity of the images in (a) at the y-axis pixel value of 126 and x-axis pixel values from 228 to 428. (c) Peak intensity of each glow type over time.