Cesium Depletion in the Positive Column of Cs–Ar Discharges

Waszink, J. H.; Polman, J.

doi:10.1063/1.1658005

Cited by 35 publications

(8 citation statements)

References 20 publications

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“…The rest of the tube cross section was filled with a homogeneous positive column. The positive column with the filament was the third PC mode [27,[36][37][38]. Xenon was excited and ionized in the filament, and bright xenon atom lines along with the cesium atom lines were observed in its emission spectrum.…”

Section: Plasma Slab Generation Using a Cs-xe DC Discharge And Experimentioning

confidence: 99%

A Technique for Time-Resolved Imaging of Millimeter Waves Based on Visible Continuum Radiation from a Cs-Xe DC Discharge — Fundamentals and Applications

Gitlin¹

2016

Plasma Science and Technology - Progress in Physical States and Chemical Reactions

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The chapter presents a review of a highly sensitive technique for time-resolved imaging and measurement of the 2D intensity profiles of millimeter waves (MMW) based on the use of visible continuum radiation (VCR) from the positive column (PC) of a medium pressure Cs-Xe DC discharge (VCRD technique). The review focuses on the operating principles, fundamentals, and applications of this new technique. The design of a discharge tube and an experimental setup which were used to create a wide homogeneous PC plasma slab are described. The MMW effects on the plasma slab are studied. The mechanism of microwave-induced variations in the VCR intensity and the causes of violation of the local relation between the visible continuum emissivity and the MMW intensity are discussed. The main characteristics, e.g., spatial and temporal resolution, and sensitivity of the VCRD technique have been evaluated. Experiments on imaging of the field patterns of horn antennas and quasioptical beams demonstrated that the VCRD technique can be used for a good-quality imaging of the MMW beams in the entire MMwavelength band. The VCRD technique was applied for imaging of output field patterns of the MMW electron tubes and determination of some of their characteristics, as well as for active real-time imaging and nondestructive testing using MM waves.

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Section: Plasma Slab Generation Using a Cs-xe DC Discharge And Experimentioning

confidence: 99%

A Technique for Time-Resolved Imaging of Millimeter Waves Based on Visible Continuum Radiation from a Cs-Xe DC Discharge — Fundamentals and Applications

Gitlin¹

2016

Plasma Science and Technology - Progress in Physical States and Chemical Reactions

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“…Comme il a déjà été rapporté précédemment [6], la distribution des atomes du Rb excités et ceux dans l'état fondamental n'est pas homogène dans la lampe émettrice, leurs nombres, pour les deux, augmentent au fur et à mesure que l'on se rapproche de la paroi. En se référant aux expériences du van Tongeren et al [12,13,14], on suppose ici qu'ils augmentent d'une manière quadratique vers la paroi, comme le montre la figure 3.…”

Section: Figunclassified

Spectre de la raie D du Rb dans le cas d'une lampe sphérique

Hirano¹

1977

Rev. Phys. Appl. (Paris)

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“…It is well known that in a low-pressure sodium discharge the concentration of sodium atoms at the axis drops virtually to zero at higher current densities. The decrease in the concentration of the uncharged sodium atoms near the axis of the discharge is referred to as 'depletion' (Waszink and Polman 1969)…”

Section: Introductionmentioning

confidence: 99%

Modelling of low-pressure Ar+Hg discharge with high electric current densities

Fang

Huang

1988

J. Phys. D: Appl. Phys.

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Deals with experimental and theoretical investigations on the characteristics of low-pressure Ar+Hg discharges with very high electric current densities. The positive column of these discharge systems is studied under the following conditions: noble gas pressure 7.7 Torr; tube radius 1.6 mm; cold-spot temperature 313-53 K (corresponding to a saturation mercury vapour pressure of 6-88 m Torr) and electric current 30-600 mA. It is found that the V-I characteristic of the positive column will be positive if the value of the current density is above a certain critical one. A six-level model which can fairly describe the depleted low-pressure Ar+Hg discharges is developed. The output of the theoretical model gives the whole macroscopic plasma properties such as the electric field strength, the electron temperature, the energy transfers of the various collision processes and the radiation output, etc. The E-I and Te-I characteristics calculated according to the model agree qualitatively with the measured results.

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Cesium Depletion in the Positive Column of Cs–Ar Discharges

Cited by 35 publications

References 20 publications

A Technique for Time-Resolved Imaging of Millimeter Waves Based on Visible Continuum Radiation from a Cs-Xe DC Discharge — Fundamentals and Applications

A Technique for Time-Resolved Imaging of Millimeter Waves Based on Visible Continuum Radiation from a Cs-Xe DC Discharge — Fundamentals and Applications

Spectre de la raie D du Rb dans le cas d'une lampe sphérique

Modelling of low-pressure Ar+Hg discharge with high electric current densities

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