Excilamps based on xenon dimers excited by a barrier discharge

Abstract

This paper presents experimental studies of excilamps based on xenon dimers excited by a barrier discharge. Their characteristics in the natural-cooling and forced-cooling regime are investigated. It is established that the limitation of the power density of the radiation at high excitation powers is associated with the cooling efficiency of the excilamp radiator. It is shown that the radiation power density of sealed excilamps based on xenon dimers can reach 100 mW/cm 2 in the quasi-steady-state regime. A circuit for an excilamp-excitation source and for the design of the excilamps is presented, along with a technique for calculating the excitation energy and power of barrier-discharge excilamps.

Optimizing the Operation of DBD Excilamps

“…This result complements the experiments presented in [24] and [25], where the transition from diffuse channels to clearly defined filaments is studied and associated to a peak in the lamp efficiency.…”

“…According to [24], the maximum efficiency conditions can differ depending on the gas mixture of the excilamp; consequently, a comparative study of different types of gas mixture DBD excilamps and other DBD reactors is one of the perspectives of this work.…”

“…5, as the frequency rises, the downward trend in the slope becomes more evident. This reduction in the ρ UV /P DBD ratio with the increase of the injected power corresponds to a reduction in the lamp efficiency, which can be attributed to overexcitation [15] or to abrupt gas heating [24].…”