Microwave plasma heating by cavity modes at electron cyclotron and lower hybrid frequencies

Radio-frequency (RF) plasma heating in the electron cyclotron and lower hybrid frequency ranges was studied using Langmuir and magnetic probes in the linear-mirror machine LISA. It was found that global modes were excited. The plasma was heated by electron cyclotron resonance and linear mode convers...

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Veröffentlicht in:	IEEE transactions on plasma science 1990-12, Vol.18 (6), p.1038-1040
Hauptverfasser:	De Cunha Rapozo, C., De Assis, A.S., Da Silva, J.C.X.
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700101 - Fusion Energy- Plasma Research- Confinement, Heating, & Production 700102 - Fusion Energy- Plasma Research- Diagnostics CONVERSION Cyclotrons ECR HEATING ELECTRIC PROBES Electromagnetic heating ELECTROMAGNETIC RADIATION ELECTRON TEMPERATURE Electrons ENERGY CONVERSION ENERGY-LEVEL TRANSITIONS Exact sciences and technology EXCITATION Frequency FREQUENCY RANGE GHZ RANGE GHZ RANGE 01-100 HEATING HIGH-FREQUENCY HEATING LANGMUIR PROBE LOWER HYBRID HEATING Magnetic field measurement MAGNETIC MIRRORS MAGNETIC PROBES MICROWAVE RADIATION OPEN PLASMA DEVICES OSCILLATION MODES Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges PLASMA PLASMA DENSITY PLASMA DIAGNOSTICS PLASMA HEATING Plasma production and heating Plasma sources Plasma temperature PROBES RADIATIONS Resonance RF SYSTEMS THERMONUCLEAR DEVICES
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Beschreibung
Zusammenfassung:	Radio-frequency (RF) plasma heating in the electron cyclotron and lower hybrid frequency ranges was studied using Langmuir and magnetic probes in the linear-mirror machine LISA. It was found that global modes were excited. The plasma was heated by electron cyclotron resonance and linear mode conversion at r=+or-3 cm using a RF source of 2.45 GHz and 1 kW. When an additional RF source of 30 MHz and 350 W was introduced, it heated the plasma via the lower hybrid resonance at r=+or-5 cm. An increase in overall electron temperature and plasma density was observed when both sources were present.< >
ISSN:	0093-3813 1939-9375
DOI:	10.1109/27.61521