Townsend discharge
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In electromagnetism, the Townsend discharge or Townsend avalanche is an ionisation process for gases where free electrons are accelerated by an electric field, collide with gas molecules, and conseque
Neon lamp/cold-cathode gas diode relaxation oscillator
Glow discharge
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A glow discharge is a plasma formed by the passage of electric current through a gas. It is often created by applying a voltage between two electrodes in a glass tube containing a low-pressure gas. Wh
Townsend discharge
…voltage between the plates is equal to the breakdown voltage needed to create a self-sustaining avalanche: it decreases when the current reaches the glow discharge regime. Subsequent experiments revealed that the current I rises faster than predicted by the above formula as the distance d increases; two different…
NE-2–type neon lamp powered by alternating current
DC-powered neon lamp, showing glow discharge surrounding only the cathode
A 5651 voltage-regulator tube in operation
Glow discharge regions