title: Effectiveness of recycling light in ultra-bright short-arc discharge lamps.
abstract: Recycling light back into a plasma lamp's radiant zone can enhance its radiance. Measurements are reported for the effectiveness, spectral properties and modified plasma radiance maps that result from light recycling with a specular hemispherical mirror in commercial 150 W ultrabright Xenon short-arc discharge lamps, motivated by projection, biomedical and high-temperature furnace applications. For certain spectral windows and plasma arc regions, radiance can be heightened by up to 70%. However, the overall light recycling efficiency is reduced to about half this value due to lamp geometry. The manner in which light-plasma interactions affect light recycling efficacy is also elucidated.
authors: Asher
authors: A
authors: Malul
authors: Doron
authors: D
authors: Nakar
authors: Daniel
authors: D
authors: Feuermann
authors: Jeffrey M
authors: JM
authors: Gordon