Effects of structured electrodes on electron power absorption and plasma uniformity in capacitive RF discharges

2021 ◽  
Vol 39 (6) ◽  
pp. 063004
Author(s):  
Li Wang ◽  
Peter Hartmann ◽  
Zoltán Donkó ◽  
Yuan-Hong Song ◽  
Julian Schulze
Keyword(s):  
Power Absorption ◽  
Rf Discharges

Comparison of the performance of oscillating water column devices based on arrangements of water columns

2020 ◽  
Vol 14 (3) ◽  
pp. 7082-7093
Author(s):  
Jahirwan Ut Jasron ◽  
Sudjito Soeparmani ◽  
Lilis Yuliati ◽  
Djarot B. Darmadi
Keyword(s):  
Wave Propagation ◽  
Water Column ◽  
Water Depth ◽  
Graphical Form ◽  
Wave Power ◽  
Oscillating Water Column ◽  
Power Absorption ◽  
Water Columns ◽  
Single Column ◽  
Parallel Arrangement

The hydrodynamic performance of oscillating water column (OWC) depends on the depth of the water, the size of the water column and its arrangement, which affects the oscillation of the water surface in the column. An experimental method was conducted by testing 4 water depths with wave periods of 1-3 s. All data recorded by the sensor is then processed and presented in graphical form. The research focused on analyzing the difference in wave power absorption capabilities of the three geometric types of OWC based on arrangements of water columns. The OWC devices designed as single water column, the double water column in a series arrangement which was perpendicular to the direction of wave propagation, and double water column in which the arrangement of columns was parallel to the direction of wave propagation. This paper discussed several factors affecting the amount of power absorbed by the device. The factors are the ratio of water depth in its relation to wavelength (kh) and the inlet openings ratio (c/h) of the devices. The test results show that if the water depth increases in the range of kh 0.7 to 0.9, then the performance of the double chamber oscillating water column (DCOWC) device is better than the single chamber oscillating water column (SCOWC) device with maximum efficiency for the parallel arrangement 22,4%, series arrangement 20.8% and single column 20.7%. However, when referring to c/h, the maximum energy absorption efficiency for a single column is 27.7%, double column series arrangement is 23.2%, and double column parallel arrangement is 29.5%. Based on the results of the analysis, DCOWC devices in parallel arrangement showed the ability to absorb better wave power in a broader range of wave frequencies. The best wave of power absorption in the three testing models occurred in the wave period T = 1.3 seconds.

Power Absorption Ratio of Minute Antenna for Millimeterwave by Sommerfeld Theory

2019 ◽  
Vol 139 (12) ◽  
pp. 699-700
Author(s):  
Yoshitsugu Kamimura ◽  
Chongsengchang Khamneexay ◽  
Ken Sato
Keyword(s):  
Power Absorption ◽  
Absorption Ratio

Specific Power Absorption of Silica-coated Magnetite Cubes

2014 ◽  
Vol 10 (5) ◽  
pp. 676-683 ◽  
Author(s):  
Gema Marcelo ◽  
Fernando Catalina ◽  
Ignacio Bruvera ◽  
Clara Marquina ◽  
Gerardo Goya
Keyword(s):  
Specific Power ◽  
Power Absorption

Measurements of Ionic Species Present in rf Discharges of Argon and Argon‐Cesium

1969 ◽  
Vol 40 (5) ◽  
pp. 2350-2356 ◽  
Author(s):  
J. L. Gilkinson ◽  
Herman Held ◽  
L. M. Chanin
Keyword(s):  
Ionic Species ◽  
Rf Discharges
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