The relationship between visible light emission and species fraction of the hydrogen ion beams extracted from 2.45 GHz microwave discharge

O D Cortázar; A Megía-Macías; O Tarvainen; T Kalvas; H Koivisto

doi:10.1063/1.4928475

The relationship between visible light emission and species fraction of the hydrogen ion beams extracted from 2.45 GHz microwave discharge

Rev Sci Instrum. 2015 Aug;86(8):083309. doi: 10.1063/1.4928475.

Authors

O D Cortázar¹, A Megía-Macías², O Tarvainen³, T Kalvas³, H Koivisto³

Affiliations

¹ Universidad de Castilla-La Mancha, INEI-Institute for Energy Research, Camilo José Cela s/n, 13170 Ciudad Real, Spain.
² CERN, BE Department, CH1211 Geneva, Switzerland.
³ Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), 40500 Jyväskylä, Finland.

PMID: 26329183
DOI: 10.1063/1.4928475

Abstract

The relationship between Balmer-α and Fulcher-band emissions with extracted H(+), H2(+), and H3(+) ions is demonstrated for a 2.45 GHz microwave discharge. Ion mass spectra and optical measurements of Balmer-α and Fulcher-band emissions have been obtained with a Wien Filter having an optical view-port on the plasma chamber axis. The beam of approximately 1 mA is analyzed for different plasma conditions simultaneously with the measurement of light emissions both with temporal resolution. The use of visible light emissions as a valuable diagnostic tool for monitoring the species fraction of the extracted beams is proposed.