A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
A study of VUV emission and the extracted electron-ion ratio in hydrogen and deuterium plasmas of a filament-driven H−/D− ion source (2019)
Komppula, J., Tarvainen, O., Kalvas, T., Koivisto, H., Myllyperkiö, P., & Toivanen, V. (2019). A study of VUV emission and the extracted electron-ion ratio in hydrogen and deuterium plasmas of a filament-driven H−/D− ion source. Physics of Plasmas, 26, 7. https://doi.org/10.1063/1.5095475
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Komppula, J.; Tarvainen, O.; Kalvas, T.; Koivisto, H.; Myllyperkiö, P.; Toivanen, V.
Lehti tai sarja: Physics of Plasmas
ISSN: 1070-664X
eISSN: 1527-2419
Julkaisuvuosi: 2019
Volyymi: 26
Artikkelin sivunumerot: 7
Artikkelinumero: 073517
Kustantaja: AIP Publishing LLC
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1063/1.5095475
Julkaisun avoin saatavuus: Ei avoin
Julkaisukanavan avoin saatavuus:
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/65185
Tiivistelmä
Vacuum ultraviolet (VUV) emission diagnostics for studying differences of electron impact processes in hydrogen and deuterium plasmas are presented. The method is applied to study a filament driven multicusp arc discharge negative ion source by comparing the VUV-emission intensities of different emission bands and extracted currents of H−/D− ions and electrons. It was found that the ratio of coextracted electrons to extracted ions is four times higher for deuterium than for hydrogen. No significant differences of the VUV-spectra or volumetric rates of ionization, excitation, production of high vibrational states, and dissociation were found between the plasmas of the two isotopes. The volumetric rates of these electron impact processes are presented for both discharges. It is concluded that in the filament ion source, the observed difference of H−/D− production through dissociative electron attachment is due to different diffusion rates across the magnetic fields of the tandem-type discharge chamber rather than the production rate of ground state molecules at their vibrational levels.
Vapaat asiasanat: plasmafysiikka; isotoopit
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2019
JUFO-taso: 1
