Original Publication Date: 1991-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
Photo ionization is the key mechanism in providing seed electrons for corona discharge. In a self sustaining corona discharge, the light emitted from the avalanche of the corona near the wire reaches locations outside the sheath region of the corona. These photons produce ionization of the air molecules resulting in free electrons moving toward the positive wire, and seeding the avalanche process resulting in positive ions which move away from the positive wire toward the other electrode.