DocumentCode :
2019095
Title :
Dense nonequilibrium plasma produced by powerful millimeter wave radiation
Author :
Golubev, S. ; Mansfeld, D. ; Razin, S. ; Sidorov, Andrey ; Skalyga, V. ; Vodopyanov, A. ; Zorin, V. ; Geller, R. ; Lamy, T. ; Sortais, P. ; Thuillier, T.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
fYear :
2003
fDate :
5-5 June 2003
Firstpage :
336
Abstract :
Summary form only given, as follows. A microwave discharge produced in magnetic trap by powerful millimeter wave radiation is new and quite distinctive object of plasma physics. Experiments have demonstrated that, Under such conditions, nonequilibrium (the temperature of electrons is much higher than the temperature of ions) plasma can be obtained in a large volume with a high, close to unity, degree of gas ionization. It has been shown that two regimes of plasma confinement can be realized Classical (Pastukhov) confinement with anisotropic electron velocity distribution function can be obtained for low plasma. density and high electron temperature of electrons. For the plasma density exceeding certain value a quasi-gasdynamic regime is realized with filled loss cone and isotropic electron velocity distribution function. Calculation results and experimental data are agreed well, especially in the part of estimation of plasma confinement time, ion composition of plasma, and total current of extracted ions. Microwave discharge in a, magnetic field under the ECR conditions is an effective source of multi-charged ions. Present experimental researches have verified that plasma with high average ion charge can be produced in the trap when the classical regime of plasma confinement with strongly anisotropic electron velocity distribution function is realized. Ion charge state distribution with temporal resolution in gases of light-weight elements has been investigated.
Keywords :
high-frequency discharges; ion sources; magnetic traps; plasma density; plasma radiofrequency heating; plasma sources; 130 kW; 37.5 GHz; Pastukhov confinement; anisotropic electron velocity distribution function; dense nonequilibrium plasma; ion composition; magnetic trap; microwave discharge; multi-charged ions source; plasma confinement; plasma density; plasma heating; powerful millimeter wave radiation; quasi-gasdynamic regime; total current; Anisotropic magnetoresistance; Distribution functions; Electron traps; Magnetic anisotropy; Perpendicular magnetic anisotropy; Plasma confinement; Plasma density; Plasma sources; Plasma temperature; Plasma waves;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 2003. ICOPS 2003. IEEE Conference Record - Abstracts. The 30th International Conference on
Conference_Location :
Jeju, South Korea
ISSN :
0730-9244
Print_ISBN :
0-7803-7911-X
Type :
conf
DOI :
10.1109/PLASMA.2003.1228932
Filename :
1228932
Link To Document :
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