Topical Terminology > Aquadag
Aquadag
For Aquadag we have a term and definition in Arcade.
Aquadag (Arcade) 
A colloidal suspension of electrically conductive graphite that is applied to the inner and outer surfaces of a CRT. The inner coating has a HV charge applied when powered, which facilitates acceleration of the electron beam as well as a safeguard against "secondary emission" (keeps "used" electrons from ricocheting off the back of the tube). The inner and outer coatings also act as capacitor plates, using the glass as a dielectric. This capacitance is used as a HV filter, supplying smooth DC voltage to the tube.
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