scholarly journals Investigation of Microwave Energy Distribution Character in a Resonator Type Plasmatron

2016 ◽  
Vol 3 (3) ◽  
pp. 122-125
Author(s):  
S. Bordusau ◽  
S. Madveika ◽  
A. Dostanko
Keyword(s):  
Energy Distribution ◽  
Electric Conductivity ◽  
Discharge Chamber ◽  
Microwave Discharge ◽  
Microwave Energy ◽  
Probe Method ◽  
Distribution Character ◽  
Active Probe

An investigation of microwave energy distribution character in a plasma of microwave discharge inside a plasmatron based on a rectangular resonator has been carried out. The experiments were done applying the "active probe" method. Microwave discharge was excited in the air and oxygen. It has been found out that the readings of the "active probe" along the discharge chamber are of periodic character. The readings of the "active probe" and data on the local electric conductivity of plasma obtained using electrical probes have been compared.

scholarly journals Investigation of the Method of Dynamic Microwave Power Redistribution in a Resonator-Type Plasmatron

2019 ◽  
Vol 6 (2) ◽  
pp. 107-110
Author(s):  
S. Madveika ◽  
S. Bordusau ◽  
A. Zemlyakov ◽  
M. Lushakova
Keyword(s):  
Microwave Power ◽  
Discharge Chamber ◽  
Probe Method ◽  
Microwave Resonator ◽  
Active Probe ◽  
Periodic Repetition

The investigation results of a dynamic microwave power fmicrowave = 2, 45 ± 0,05 GHz redistribution in a 9000 cm<sup>3</sup> reaction-discharge chamber of a microwave resonator-type plasmatron are presented. In order to redistribute the microwave power, a rotating metallic four-blade L-form dissector placed above the reaction-discharge chamber was used. The microwave power in the local points at the axis of the chamber with plasma and without it was measured applying the "active probe" method. During the experiments the chamber contained silicon plates. Periodical interchange of maximum and minimum microwave power values along the chamber axis was established experimentally. Note, when the dissector was rotating, the range of maximum and minimum "active probe" values dispersion decreased. It has been established that during the dissector rotation the microwave power in the local discharge areas changes with periodic repetition every quarter of revolution.

Microwave Discharge Chamber

1960 ◽  
Vol 15 (3) ◽  
pp. 532-532 ◽  
Author(s):  
Shūji Fukui ◽  
Satio Hayakawa
Keyword(s):  
Discharge Chamber ◽  
Microwave Discharge

Actinometry Measurement of Oxygen Dissociation Degree in a Microwave Discharge Plasma and Effect of Electron Energy Distribution Function

2007 ◽  
Vol 10 (2) ◽  
Author(s):  
Takeshi Sakamoto ◽  
Haruaki Matsuura ◽  
Hiroshi Akatsuka
Keyword(s):  
Distribution Function ◽  
Oxygen Atom ◽  
Energy Distribution ◽  
Electron Energy ◽  
Electron Energy Distribution Function ◽  
Oxygen Plasma ◽  
Microwave Discharge ◽  
Oxygen Molecule ◽  
Energy Distribution Function ◽  
Dissociation Degree

AbstractWe measured the dissociation degree of oxygen molecule in a microwave discharge oxygen plasma by optical emission spectroscopy measurement based on actinometry method. We generated an oxygen plasma in a cylindrical quartz tube (26 mm i.d.) with a discharge pressure 0.5 - 3.0 Torr. The microwave frequency was 2.45 GHz and the output power was set at 600 W. We monitored the oxygen atom density by actinometry using the 844.6 nm line of oxygen atom and the 811.5 nm line of argon. The dissociation degree was estimated at about a few percent. To discuss the validity of the measured dissociation degree, we calculated the population balance equations of the active spices and EEDF (electron energy distribution function) self-consistently. The theoretical calculations were in agreement with the experimental results. We discussed the validity of the dissociation degree of oxygen molecule and some reactions, which play an important role in the microwave discharge oxygen plasma.

Diagnostic Method for Measuring Ionization Rates in Shock Heated Gases

1968 ◽  
Vol 23 (5) ◽  
pp. 752-756
Author(s):  
H. Klingenberg ◽  
A. Siddiqui
Keyword(s):  
Energy Distribution ◽  
Shock Tube ◽  
Transmission Line ◽  
Spatial Resolution ◽  
Diagnostic Method ◽  
High Spatial Resolution ◽  
Probe Method ◽  
Bow Shocks ◽  
Geometrical Dimensions ◽  
Ionization Rates

The practicability of a method using two wires as transmission line for microwaves as a diagnostic method on a shock tube was investigated. The energy distribution around the wires was calculated which showed a high spatial resolution independent of the frequency for this method. The wires cause bow shocks because the flow is hypersonic which should be taken into account. The geometrical dimensions happen to be the same as those in a probe method used by HOBSON, hence the disadvantages are comparable.

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