Fig. 4. Effective dielectric constant in ethanol, as a function of sheath thickness of thermo-retractable material around the central electrode. Circles correspond with measurements. The line corresponds with a simulation assuming 
in the sheath
Fig. 4. Effective dielectric constant in ethanol, as a function of sheath thickness of thermo-retractable material around the central electrode. Circles correspond with measurements. The line corresponds with a simulation assuming in the sheath