Continuous Disinfection of Airborne Pathogens Using Far UV-C KRCL∗Microplasma Lamp for Personal Protection

Microplasma lamps based on the confinement of a weakly-ionized, low-temperature plasma in a microscale cavity have been found to be ideal for far UV-C radiation at 222 nm (KrCl ∗ excimer). During the last several years, researchers have demonstrated that far UV-C 222 nm efficiently kills airborne pathogens (coronaviruses) with minimal risk of harm to human skin or eyes. Therefore, the data support the premise that far UV-C 222 nm from a KrCl∗ excimer emission in the microplasma flat lamp can be used safely in occupied spaces. In particular, ACGIH recently increased the allowed human exposure levels at 222 nm more than seven times. 1 © 2022 IEEE.