Some Properties of a Novel Far UV Xenon Excimer Barrier Discharge Light Source

Stockwald, K.; Neiger, M.

doi:10.1002/ctpp.2150350103

Cited by 43 publications

(32 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the rates of excitation and ionisation of xenon by electron collision rise exponentially with E / N , this radial decrease of E/N will be the dominating process of discharge constriction. 4.08+09 4 …”

Section: Radial Distribution Of the Excimer Moleculesmentioning

confidence: 96%

UV Radiation of Low Pressure XeCl* and KrCl* Glow Discharges

Schwabedissen

Bötticher

1995

Contrib. Plasma Phys.

View full text Add to dashboard Cite

The positive column of low pressure DC glow discharges in Xe/CI, and Kr/C1, gas mixtures has been investigated with respect to its UV radiation power and radiative efficiency for a wide range of parameters (total gas pressure: 1 -30 mbar, current 10-30 mA, partial pressure of CI,: 1 -33%). Also the radial distribution of the particle number densities of XeCl* ( B ) and KrCI* (B) has been determined by absolutely calibrated emission spectroscopy. Optimum UV (190-350 nm) output and efficiency has been found in gas mixtures with a relative CI2 partial pressure of 2-3% and total gas pressure of 12-18 mbar. At these parameters, the UV radiation power per column length is greater than 40 Watt/m with a radiative efficiency of 15-18%. These discharges could be used for UV induced photochemical processes.

show abstract

Section: Radial Distribution Of the Excimer Moleculesmentioning

confidence: 96%

UV Radiation of Low Pressure XeCl* and KrCl* Glow Discharges

Schwabedissen

Bötticher

1995

Contrib. Plasma Phys.

View full text Add to dashboard Cite

show abstract

“…Traditional xenon DBD lamps are driven by sinusoidal voltage waveforms, with discharge efficiency typically in the range of 10-20 %, and the discharge consisting of multiple narrow filamentary channels [8]. A dramatic increase in efficiencies of up to 40 % has been demonstrated experimentally (included transmission losses through the quartz and geometric loss) by using short pulsed voltages (<750 ns) interrupted by long idle periods (∼ 40 μs) [9].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of VUV Emission from a Coaxial Xenon Excimer Ultraviolet Lamp Driven by Distorted Bipolar Square Voltages

Jou

Hung

Chiu

et al. 2011

Contrib. Plasma Phys.

View full text Add to dashboard Cite

Enhancement of vacuum UV emission (172 nm VUV) from a coaxial xenon excimer UV lamp (EUV) driven by distorted 50 kHz bipolar square voltages, as compared to that by sinusoidal voltages, is investigated numerically in this paper. A self-consistent radial one-dimensional fluid model, taking into consideration non-local electron energy balance, is employed to simulate the discharge physics and chemistry. The discharge is divided into two three-period portions; these include: the pre-discharge, the discharge (most intense at 172 nm VUV emission) and the post-discharge periods. The results show that the efficiency of VUV emission using the distorted bipolar square voltages is much greater than when using sinusoidal voltages; this is attributed to two major mechanisms. The first is the much larger rate of change of the voltage in bipolar square voltages, in which only the electrons can efficiently absorb the power in a very short period of time. Energetic electrons then generate a higher concentration of metastable (and also excited dimer) xenon that is distributed more uniformly across the gap, for a longer period of time during the discharge process. The second is the comparably smaller amount of "wasted" power deposition by Xe + 2 in the post-discharge period, as driven by distorted bipolar square voltages, because of the nearly vanishing gap voltage caused by the shielding effect resulting from accumulated charges on both dielectric surfaces.

show abstract

“…A typical efficiency level of about 10-20% can be obtained in two-barrier excilanips where the discharge is excited using high voltage HF-excitation with a sinusoidal waveform [3,4]. In [11,13], it was probably mentioned for the first time that a significant increase in efficiency of lamp operation can be obtained by driving the discharge with short unipolar pulses in comparison to usually used sinusoidal waveforms.…”

Section: Introductionmentioning

confidence: 99%

“…Over more than one and a half decade, starting from the works [1,2], there is an increasing interest in UV and VUV spontaneous radiation sources in which radiation of exciplex and excimer molecules is used [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Such sources were named as excilamps [10].…”

Section: Introductionmentioning

confidence: 99%

Discharge and radiation characteristics of Xe one-barrier excilamps

et al. 2002

View full text Add to dashboard Cite

The paper is devoted to experimental study of discharge and radiation characteristics taking place in Xe one-barrier excilamps at broad variations of excitation pulse parameters and gas fill-pressures. The B-X band of the molecule Xe2 dominates the lamp spectrum and has high efficiency. Radiation of monatomic lines and luminescence of the lamp bulb can be observed too. The molecule Xe2* band B-X radiation of luminescence time dependence and luminescence of the lamp bulb quartz are similar, at the same time the radiation of Xe monatomic line = 467 nm has obviously some other form.Depending on excitation conditions, i.e. power, duration and excitation impulse form, a gas discharge Xe excilamp, different by homogeneity level and radiation efficiency types of discharge can be realized. Formation of discharge homogeneity is the necessary condition to obtain high efficiencies of excimer radiation in this type of lamp. In one-barrier xenon excilamps with internal small curvature of an electrode, a homogeneous discharge forms at pressures up to 300 Ton.

show abstract

Some Properties of a Novel Far UV Xenon Excimer Barrier Discharge Light Source

Cited by 43 publications

References 8 publications

UV Radiation of Low Pressure XeCl* and KrCl* Glow Discharges

UV Radiation of Low Pressure XeCl* and KrCl* Glow Discharges

Enhancement of VUV Emission from a Coaxial Xenon Excimer Ultraviolet Lamp Driven by Distorted Bipolar Square Voltages

Discharge and radiation characteristics of Xe one-barrier excilamps

Contact Info

Product

Resources

About