Power efficiency improvements with the radio frequency H− ion source
Kalvas, T., Tarvainen, O., Komppula, J., Koivisto, H., Tuunanen, J., Potkins, D., Stewart, T., & Dehnel, M. (2016). Power efficiency improvements with the radio frequency H− ion source. Review of Scientific Instruments, 87(2), Article 02B102. https://doi.org/10.1063/1.4932008
Julkaistu sarjassa
Review of Scientific InstrumentsTekijät
Päivämäärä
2016Tekijänoikeudet
© 2015 AIP Publishing LLC.
CW 13.56 MHz radio frequency-driven H−
ion source is under development at the University of
Jyväskylä for replacing an existing filament-driven ion source at the MCC30/15 cyclotron. Previously,
production of 1 mA H− beam, which is the target intensity of the ion source, has been reported at
3 kW of RF power. The original ion source front plate with an adjustable electromagnet based filter
field has been replaced with a new front plate with permanent magnet filter field. The new structure
is more open and enables a higher flux of ro-vibrationally excited molecules towards the plasma
electrode and provides a better control of the potential near the extraction due to a stronger separation
of the main plasma from the plasma electrode. While the original system provided better control
over the e−
/H
−
ratio, the new configuration has led to a higher production efficiency of 1 mA H−
at 1.75 kW RF power. The latest results and upgrade plans are presented
Julkaisija
American Institute of PhysicsISSN Hae Julkaisufoorumista
0034-6748Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/25230732
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