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Experimental study of temperature and density evolution during breakdown in a 2.45 GHz ECR plasma

O.D. Cortázar, A. Megia-Macías, A. Vizcaíno-de-Julián

20th International Workshop on Electron Cyclotron Resonance Ion Sources, Sídney (Australia). 25 septiembre 2012


Resumen:

An experimental study of temperature and density evolution during breakdown in off-resonance ECR hydrogen plasma by time resolved Langmuir probe diagnostic is presented. Under square 2.45 GHz microwave excitation pulses with a frequency of 50 Hz and relative high microwave power, unexpected transient temperature peaks that reach 18 eV during 20μs are reported at very beginning of plasma breakdown. Decays of such peaks reach final stable temperatures of 5 eV at flat top microwave excitation pulse. Microwave coupling times are also measured in connection with plasma parameters evolution as function of duty cycles and incoming microwave power for two hydrogen working pressures.


Fecha de publicación: septiembre 2012.



Cita:
O.D. Cortázar, A. Megia-Macías, A. Vizcaíno-de-Julián, Experimental study of temperature and density evolution during breakdown in a 2.45 GHz ECR plasma, 20th International Workshop on Electron Cyclotron Resonance Ion Sources - ECRIS 2012, Sídney (Australia). 25-28 Septiembre 2012. En: ECRIS 2012 Conference proceedings, ISBN: 978-3-95450-123-6

IIT-12-192C

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