Efficiency of the barrier-discharge UV Xe: SF6 lamp

Pikulev, A. A.; Tsvetkov, V. A.

doi:10.1134/s1063784208100125

Cited by 4 publications

(7 citation statements)

References 8 publications

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“…Note that the intensity versus repetition rate dependence exhibits some features in the range f = 35-200 Hz, which are presumably associated with the mechanism of SF 6 molecule decomposition in an intense nanosec ond discharge. When the partial pressure of SF 6 increases, the dependences of the KrF band intensity on the charge voltage and repetition rate remain almost linear but the total intensity of the discharge radiation slightly drops.…”

Section: Properties Of the Exciplex Emittermentioning

confidence: 87%

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Mercury-free emitter pumped by a krypton fluoride molecule pulse-periodic barrier discharge

et al. 2012

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The characteristics of a pulsed-periodic short barrier discharge emitter operating at wavelength λ = 248 nm KrF(X-B) are investigated. The operating mixtures of the UV lamp are low aggressive kryptonsulfur hexafluoride (SF 6 ) mixtures at a total pressure in the range 1-50 kPa and a SF 6 partial pressure of 0.1-0.4 kPa. The spectral characteristics of the plasma are studied, and the 248 nm KrF(X-B) band luminosity is optimized in terms of the operating mixture composition, pump voltage, and pulse repetition rate. The mean power of UV emission from the lateral surface of the cylindrical lamp is estimated.

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Section: Properties Of the Exciplex Emittermentioning

confidence: 87%

“…This problem can be solved by using a discharge with two or three dielectric barriers. The functioning of a pulsed-periodic high frequency (f ≈ 100 kHz) emitter with two planar barriers was opti mized for Xe-SF 6 and Xe-NF 3 mixtures with the aim of developing a noncarcinogenic lamp based on the 354 nm XeF(X-B) band [5,6].…”

Section: Introductionmentioning

confidence: 99%

Mercury-free emitter pumped by a krypton fluoride molecule pulse-periodic barrier discharge

et al. 2012

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“…In [7], a new approach to study the energy balance in excilamps was suggested. Its underlying idea is to detect the fast (a characteristic time of ~100 ms) and…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, direct measurements of the acoustic parameters of excilamps were not made, although a semi empirical qualitative model was constructed [7,11] allowing one to describe the behavior of model param eters α ac and α T , which are the fractions of the dis charge energy that are spent on acoustic wave genera tion and direct heating of the gas. Calculations showed that α T > α ac at a low pressure in the lamp and α T < α ac at a high pressure.…”

Section: Introductionmentioning

confidence: 99%

“…The gas mixture is considered as a ther modynamic system the temperature of which rises with the volume remaining unchanged (isochoric pro cess). This approach was extended for studying the energy characteristics of KrCl, KrBr, XeBr, and Cl 2 BD excilamps [7][8][9][10][11][12] and Br 2 , Cl 2 , XeBr, and XeCl microwave discharge excilamps [13].…”

Section: Introductionmentioning

confidence: 99%

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Acoustic characteristics of a barrier-discharge XeCl excilamp

2012

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The generation of an acoustic signal by means of voltage pulses (f = 15 kHz) applied to the electrodes of a barrier discharge excilamp based on a Xe/Cl 2 = (50-500)/1 mixture kept at a pressure of 5-500 Torr is studied. It is shown that, from the time variation of the acoustic signal intensity, one can judge the time instant the excilamp starts operating in a steady mode. Optimal (in power and efficiency) operating conditions of the excilamp are found (Xe/Cl 2 = 240/1, p = 98 Torr, η ≈ 9.5%). It is experimentally demonstrated that the dis charge energy at a low pressure is spent largely on heating the gas. This is indicative of the volume heat release and volume glow discharge (as the pressure grows, the efficiency of this source of energy consumption drops and more and more energy is spent on acoustic vibration excitation). Under higher pressures, the Fourier spectrum of the acoustic signal becomes richer, the intensity of the spectrum rises, and the dispersion of the signal grows. At very high pressures, the intensity of the acoustic signal drops to a level corresponding to the natural vibrations of the excilamp envelope without the discharge (when the discharge is quenched, the Fou rier spectrum of the signal becomes depleted and contains only harmonics corresponding to the carrier fre quency of voltage pulses from the power source).

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