Assertion: cathode's electron | /r/Causes | dozens of ionizing collisions
Facets:
value: via the townsend avalanche
type: MANNER
Source sentences:
text: For example, the average electron may cause dozens of ionizing collisions via the Townsend avalanche; the resulting positive ions head toward the cathode, and a fraction of those that cause collisions with the cathode will dislodge an electron by secondary emission.