Contactless method for studying the parameters of the electrode region of an RF discharge

2002 ◽  
Vol 28 (12) ◽  
pp. 1001-1007
Author(s):  
A. F. Aleksandrov ◽  
V. A. Ryaby ◽  
V. P. Savinov ◽  
V. G. Yakunin
Keyword(s):  
Rf Discharge ◽  
Contactless Method ◽  
Electrode Region

scholarly journals Particle Surface Modification in the Near-Electrode Region of an RF Discharge

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2931
Author(s):  
Evgenii Aleksandrovich Kononov ◽  
Mikhail Mikhailovich Vasiliev ◽  
Elena Valeryevna Vasilieva ◽  
Oleg Fedorovich Petrov
Keyword(s):  
Discharge Chamber ◽  
Particle Surface ◽  
Metal Coating ◽  
Rf Discharge ◽  
Melamine Formaldehyde ◽  
Plasma Exposure ◽  
Lower Electrode ◽  
Electrode Region ◽  
Particle Coating ◽  
Composition And Structure

The results of a study on particles’ surfaces after being exposed to the near-electrode region of a radio frequency (RF) discharge are presented. It was experimentally displayed that metal starts being deposited on the surface of particles levitating above the lower electrode of the discharge chamber after switching the RF discharge on. For melamine-formaldehyde (MF) particles, the appearance of an island metal coating is observed after 30 min of plasma exposure. Eroded electrodes and elements of the gas discharge chamber may serve as a source of deposited material. In addition, an analysis of the surface and composition of particles placed on the upper electrode after 6 h of plasma exposure is presented. We reveal that the composition and structure of the particle coating changes during the experiment. The MF particles under exposure become eroded, and needle-like structures containing metals are formed on their surface. We also observe the formation of columnar structures from the products of erosion of electrodes on particles with a metal coating.

A Prototype of Electric Discharge Gas-Flow Oxygen–Iodine Laser: 2. Simulation of the Parameters of the Active Medium Formed in a Gas-Flow Slab RF Discharge in O2 : He : CF3I Mixtures

2020 ◽  
Vol 46 (11) ◽  
pp. 1114-1123
Author(s):  
N. P. Vagin ◽  
A. A. Ionin ◽  
A. Yu. Kozlov ◽  
I. V. Kochetov ◽  
A. P. Napartovich ◽  
...  
Keyword(s):  
Active Medium ◽  
Electric Discharge ◽  
Gas Flow ◽  
Rf Discharge ◽  
Iodine Laser ◽  
Discharge Gas

Laser capabilities of CuBr mixture excited by RF discharge

2000 ◽  
Vol 8 (2) ◽  
pp. 277-286 ◽  
Author(s):  
M. Grozeva ◽  
M. Kocik ◽  
J. Mentel ◽  
J. Mizeraczyk ◽  
T. Petrov ◽  
...  
Keyword(s):  
Rf Discharge

scholarly journals Multi-Camera Based Setup for Geometrical Measurement of Free-Falling Molten Glass Gob

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1041
Author(s):  
Mazhar Hussain ◽  
Mattias O’Nils ◽  
Jan Lundgren
Keyword(s):  
Free Fall ◽  
Frame Rate ◽  
Geometrical Parameters ◽  
Contactless Method ◽  
Molten Material ◽  
Dynamic Changes ◽  
Direct Measurements ◽  
Molten Materials ◽  
Free Falling

High temperatures complicate the direct measurements needed for continuous characterization of the properties of molten materials such as glass. However, the assumption that geometrical changes when the molten material is in free-fall can be correlated with material characteristics such as viscosity opens the door to a highly accurate contactless method characterizing small dynamic changes. This paper proposes multi-camera setup to achieve accuracy close to the segmentation error associated with the resolution of the images. The experimental setup presented shows that the geometrical parameters can be characterized dynamically through the whole free-fall process at a frame rate of 600 frames per second. The results achieved show the proposed multi-camera setup is suitable for estimating the length of free-falling molten objects.

Q-switched slab RF discharge CO laser

2017 ◽  
Vol 14 (5) ◽  
pp. 055001 ◽  
Author(s):  
A A Ionin ◽  
Yu V Kochetkov ◽  
A Yu Kozlov ◽  
D V Mokrousova ◽  
L V Seleznev ◽  
...  
Keyword(s):  
Rf Discharge ◽  
Co Laser
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