Electron beam deposition studies of the rare gases

Mandl, A.; Salesky, Edward T.

doi:10.1063/1.337292

Cited by 16 publications

(2 citation statements)

References 4 publications

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“…The spatial distribution of the deposited e-beam energy was determined beforehand, using a technique described in Ref. 5. Fluorescence emitted by the excited gas was photographed through an end window of the cavity under non-lasing conditions.…”

Section: ! Descriptionof Device and Experimental Conditionsmentioning

confidence: 99%

Improvements in long-pulse, electron-beam pumped XeF(C→A) laser performance

Litzenberger

Mandl

1990

SPIE Proceedings

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The performance of the XeF(C9A) laser, pumped at a rate of 290 kW/cm3 with a 600ns electron beam pulse, has been improved through the optimization of the laser gas mixture and resonator output coupler reflectivity, and by injecting radiation into the cavity from an external source so as to reduce the flux buildup time. An intrinsic efficiency of 1.8% and a specific output energy of 3 3/1 have been demonstrated, and a total output energy of 4 J has been recorded. This represents the best performance obtained thus far for any directly electrically-excited Xef(C4A) laser. The laser pulse duration was 500 ns (FWHM).The laser bandwidth has been reduced to less than 1.3 A (the resolution of the spectrometer) by injecting a narrowband signal, and the wavelength of the laser has been tuned from 478.6 to 486.8 nm. The small-signal net gain has been measured during the electron beam pulse at various wavelengths, and the sidelight fluorescence spectrum has been recorded.

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Section: ! Descriptionof Device and Experimental Conditionsmentioning

confidence: 99%

Improvements in long-pulse, electron-beam pumped XeF(C→A) laser performance

Litzenberger

Mandl

1990

SPIE Proceedings

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“…The deposited electron-beam energy density in the gas, i.e., specific energy density (SED), was evaluated on the basis of the pressure jumps observed in the reactant gas, which was due to heating by pulsed electron beams. 9) The derived energy corresponding to a pressure jump was then corrected by adding to it the energy dissipated from the nitrogen plasma in the form of optical emission, which was assumed to be 10% of SED considering the experimental results. 10,11) SED is defined here as an energy density that is averaged over the total gas volume (53 L) and also reduced under the standard condition (273 K, 101.3 kPa).…”

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confidence: 99%

Enhanced Decomposition of CF₄ in Atmospheric-Pressure Nonthermal Nitrogen Plasmas by Pulsed-Electron-Beam Pumping

Okuda¹,

Takahashi²,

Katō³

2008

jjap

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The decomposition of CF 4 using pulsed-electron-beam-generated atmospheric-pressure nonthermal nitrogen plasmas (CF 4 900 ppm, 130 kPa) is demonstrated. A high energy efficiency was obtained in the destruction and removal of CF 4 compared with the results obtained using dielectric-barrier-discharge plasmas. The results are mainly attributed to the enhanced decomposition of CF 4 by nitrogen ions that are efficiently generated by high-energy electron beams. The scavenging of reactive intermediates from the plasma without producing hydrogen fluoride is also attempted and its validity is discussed.

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Large area electron beam pumped krypton fluoride laser amplifier

Sethian

Obenschain

Gerber

et al. 1997

Review of Scientific Instruments

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Nike is a recently completed multi-kilojoule krypton fluoride (KrF) laser that has been built to study the physics of direct drive inertial confinement fusion. This paper describes in detail both the pulsed power and optical performance of the largest amplifier in the Nike laser, the 60 cm amplifier. This is a double pass, double sided, electron beam-pumped system that amplifies the laser beam from an input of 50 J to an output of up to 5 kJ. It has an optical aperture of 60 cm × 60 cm and a gain length of 200 cm. The two electron beams are 60 cm high × 200 cm wide, have a voltage of 640 kV, a current of 540 kA, and a flat top power pulse duration of 250 ns. A 2 kG magnetic field is used to guide the beams and prevent self-pinching. Each electron beam is produced by its own Marx/pulse forming line system. The amplifier has been fully integrated into the Nike system and is used on a daily basis for laser-target experiments.

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Electron beam deposition studies of the rare gases

Abstract: The spatial distribution and absolute values of the stopping power of the rare gases Kr, Ar, and Ne were determined in 250-kV electron beam excited gas mixtures. The measured values were compared with 1D and 3D Monte Carlo code calculations. Excellent agreement was found in alI cases.

Cited by 16 publications

References 4 publications

Improvements in long-pulse, electron-beam pumped XeF(C→A) laser performance

Improvements in long-pulse, electron-beam pumped XeF(C→A) laser performance

Enhanced Decomposition of CF₄ in Atmospheric-Pressure Nonthermal Nitrogen Plasmas by Pulsed-Electron-Beam Pumping

Large area electron beam pumped krypton fluoride laser amplifier

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Electron beam deposition studies of the rare gases

Abstract: The spatial distribution and absolute values of the stopping power of the rare gases Kr, Ar, and Ne were determined in 250-kV electron beam excited gas mixtures. The measured values were compared with 1D and 3D Monte Carlo code calculations. Excellent agreement was found in alI cases.

Cited by 16 publications

References 4 publications

Improvements in long-pulse, electron-beam pumped XeF(C→A) laser performance

Improvements in long-pulse, electron-beam pumped XeF(C→A) laser performance

Enhanced Decomposition of CF4 in Atmospheric-Pressure Nonthermal Nitrogen Plasmas by Pulsed-Electron-Beam Pumping

Large area electron beam pumped krypton fluoride laser amplifier

Contact Info

Product

Resources

About

Enhanced Decomposition of CF₄ in Atmospheric-Pressure Nonthermal Nitrogen Plasmas by Pulsed-Electron-Beam Pumping