First results from an ultra-fast frame image acquisition diagnostic coupled to a 2.45 GHz microwave hydrogen discharge are presented. The plasma reactor has been modified to include a transparent doubled shielded quartz window allowing to viewing the full plasma volume. Pictures describing the breakdown process at 1 μs exposure time have been obtained for integrated visible light signal, Balmer-alpha, Balmer-beta lines, and Fulcher-band. Several different plasma emission distributions are reported. The distribution depends on the magnetic field configuration, incident microwave power, and neutral gas pressure.
JCR Impact Factor and WoS quartile: 1.614 - Q3 (2014); 1.523 - Q3 (2020)
DOI reference: 10.1063/1.4824812
Published on paper: February 2014.
Published on-line: October 2013.
O.D. Cortázar, A. Megia-Macías, A. Vizcaíno-de-Julián, O. Tarvainen, J. Komppula. Ultra-fast intensified frame images from an electron cyclotron resonance hydrogen plasma at 2.45 GHz: Some space distributions of visible and monochromatic emissions. Review of Scientific Instruments. Vol. 85, nº. 2, pp. 02A90-1 - 02A90-4, February 2014. [Online: October 2013]