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18 Oct 2004

Volume 85, Issue 16, pp. 3343-3639

Issue Cover Spotlight Figure

Appl. Phys. Lett. 85, 3570 (2004); http://dx.doi.org/10.1063/1.1807953 (2 pages)

X. N. Zhang, C. R. Li, Z. Zhang, and Z. X. Cao
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Electric fields in a sheath near a metal–dielectric interface

E. V. Barnat and G. A. Hebner

Appl. Phys. Lett. 85, 3393 (2004); http://dx.doi.org/10.1063/1.1766075 (3 pages)

Online Publication Date: 22 October 2004

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Spatially resolved electric fields in the sheath region near a metal–dielectric junction were measured in a radio-frequency-driven argon plasma. The fields were determined by observing the Stark shifted transitions to the 13d[3∕2]1 Rydberg state by laser-induced fluorescence-dip spectroscopy. Calibration of the Stark shifts for the 13d[3∕2]1 Rydberg state were experimentally obtained in a separate apparatus. Maps of the electric fields illustrate that the structure of the sheath formed around the junction depended on both the surface material and on the configuration of the surface.
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52.40.Kh Plasma sheaths
52.70.Kz Optical (ultraviolet, visible, infrared) measurements
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
52.40.Hf Plasma-material interactions; boundary layer effects
32.70.Jz Line shapes, widths, and shifts
32.60.+i Zeeman and Stark effects

Nonmonotonic excitation rates in argon positive column

R. R. Arslanbekov, V. I. Kolobov, E. A. Bogdanov, and A. A. Kudryavtsev

Appl. Phys. Lett. 85, 3396 (2004); http://dx.doi.org/10.1063/1.1806557 (3 pages) | Cited 7 times

Online Publication Date: 22 October 2004

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Nonmonotonic radial distributions of electron excitation rates are obtained in simulations of positive column (PC) in argon for a wide range of gas pressures 5<p<100 Torr, in the tube of radius R=1 cm. This effect cannot be understood from the hydrodynamic point of view and has its origin in the peculiarities of electron kinetics in PC under the studied conditions.
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52.25.Fi Transport properties
51.50.+v Electrical properties (ionization, breakdown, electron and ion mobility, etc.)
52.80.-s Electric discharges
52.65.-y Plasma simulation
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