Radiation characteristics of coaxial KrBr^*excilamps based on a dielectric barrier discharge

Development of a Hg-free UV light source incorporating a Kr/Br2 gas, and its application for wastewater treatments

“…Moreover, the emission line at 207 nm for the [KrBr*] is especially optimal for photobiological applications in that the absorption spectrum of DNA molecules exhibits two absorption maxima in the vicinity of 200 and 260 nm [25]. The coefficient of linear absorption in the region of the 207-nm line of [KrBr*] is about twofold greater than in the long-wavelength maximum [26]. Subsequently, we used the Kr/Br 2 mixture in the fabrication of Hg-free MDEL prototypes for further evaluation of wastewater treatment using the UV light generated from the Kr/ Table 1 Self-ignition test results for the excimer/halogen-MDELs (R/H-MDELs) using an applied alternating current at a frequency of 9-12 kHz (dielectric barrier discharge: DBD) versus irradiation with 2.45-GHz microwaves (microwave discharge: MWD) at an input power of 500 W Br 2 gases within the MDEL that involved several reaction steps as described by Han and co-workers [25].…”

Radiant characteristics of high power excilamps with binary exciplexes of XeCl and XeBr

“…The sample lamps were sealed to the in situ measurement vacuum system [31,32] respectively, so that they could be filled with gas mixture at various pressure as well as various halogen percent ages. The gases xenon, chlorine and bromine were mixed first in a glass bottle at certain proportions and then be filled into the lamp from high pressure to low pressure, in turn, in the range of 50-600 mbar.…”

“…As reported previously, the radiant power P rad can be calculated according to Keitz formula [27,31,32], since the distance (m) D from the lamp axis to the UV detector is more than 2.5 times of the measured emitting length (m) L,…”

“…Excilamps have the advantage of no self-absorption occurring in the discharges owing to the absence of resonance radiation trapping by ground state, which results in the strong UV radiation with narrow-band spectral distribution when driven by high electrical power density up to 1 kW m −1 [31,32]. For this reason, the excilamps measure up to the requirements for high power in the industrial applications, especially those sensitive to particular UV wavelengths.…”

Soft switching circuit to improve efficiency of all solid-state Marx modulator for DBDs

“…Dielectric barrier discharges (DBDs) have been applied in a variety of modern pulsed power applications, such as liquid food sterilization, water decontamination and air pollution control [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. DBDs are traditionally excited by high voltage and high frequency sinusoidal supply [16][17][18][19][20][21][22].…”