Effect of the two-close-frequency heating to the extracted ion beam and to the X-ray flux emitted by the ECR plasma

R. Rácz, S. Biri, Z. Perduk, J. Pálinkás, D. Mascali, M. Mazzaglia, E. Naselli, G. Torrisi, G. Castro, L. Celona, S. Gammino, A. Galata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Multiple frequency heating has been used since the '90 in ECR ion sources as heating schemes able to improve current intensities especially for highly charged ions. More recently "Two Close Frequency Heating", where the frequency gap is comparable with the scale-length of the resonance, has been proposed, expected also to be sensitive to the relative waves' phase relationship. At ATOMKI - Debrecen a dedicated experiment has been carried out for exploring the effects of the combined frequencies and their relative phase-difference in an argon plasma. The second frequency was finely tuned between 13.6-14.6 GHz with respect to the first one (fixed 14.25 GHz). An optimal frequency gap (in terms of Ar11+/Ar6+ beam currents ratios) has been experimentally found, in agreement with the theory; the optimal power balance (total RF power was 200 W) between the two frequencies has been determined empirically. A weak but clear effect of the relative phase shift has been observed. Each configuration has been characterized by a multi-diagnostics setup: HPGe and SDD detectors were used for the X-rays, a RF probe was introduced inside the plasma chamber to detect the radio-emission from the plasma.

Original languageEnglish
Article numberC12012
JournalJournal of Instrumentation
Volume13
Issue number12
DOIs
Publication statusPublished - Dec 12 2018

Fingerprint

Ion beams
Heating
Plasma
ion beams
Fluxes
Plasmas
X rays
heating
x rays
Ion sources
Phase shift
Argon
Detectors
Ions
Phase Difference
argon plasma
radio emission
beam currents
Phase Shift
Length Scale

Keywords

  • Inspection with x-rays
  • Nuclear instruments and methods for hot plasma diagnostics
  • Plasma diagnostics - interferometry, spectroscopy and imaging

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Effect of the two-close-frequency heating to the extracted ion beam and to the X-ray flux emitted by the ECR plasma. / Rácz, R.; Biri, S.; Perduk, Z.; Pálinkás, J.; Mascali, D.; Mazzaglia, M.; Naselli, E.; Torrisi, G.; Castro, G.; Celona, L.; Gammino, S.; Galata, A.

In: Journal of Instrumentation, Vol. 13, No. 12, C12012, 12.12.2018.

Research output: Contribution to journalArticle

Rácz, R, Biri, S, Perduk, Z, Pálinkás, J, Mascali, D, Mazzaglia, M, Naselli, E, Torrisi, G, Castro, G, Celona, L, Gammino, S & Galata, A 2018, 'Effect of the two-close-frequency heating to the extracted ion beam and to the X-ray flux emitted by the ECR plasma', Journal of Instrumentation, vol. 13, no. 12, C12012. https://doi.org/10.1088/1748-0221/13/12/C12012
Rácz, R. ; Biri, S. ; Perduk, Z. ; Pálinkás, J. ; Mascali, D. ; Mazzaglia, M. ; Naselli, E. ; Torrisi, G. ; Castro, G. ; Celona, L. ; Gammino, S. ; Galata, A. / Effect of the two-close-frequency heating to the extracted ion beam and to the X-ray flux emitted by the ECR plasma. In: Journal of Instrumentation. 2018 ; Vol. 13, No. 12.
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