  We discuss the opportunities of diagnosing the parameters of hypothetical
"wild cables" in fusion plasmas via analyzing the Stark broadening of hydrogen
spectral lines. The "wild cables" concept have suggested the observed
long-lived skeletal structures in tokamaks and Z-pinches to be caused by a
microdust-assembled skeleton. We present the results of calculating the widths
of vacuum channels produced by the pressure of on-skeleton high-frequency (HF)
electromagnetic waves of the TEM type, which thus might protect the skeletons
from ambient high-temperature plasma. The values of amplitude of such wave
appear to be compatible with the measurements of those in-plasma HF electric
fields in tokamak T-10 and a gaseous Z-pinch which give observable Stark
broadening of hydrogen spectral lines.
