Electronic temperatures, densities and plasma X-ray emission of a 14.5 GHz Electron-Cyclotron Resonance Ion Source

Alexander Gumberidze (1) , Martino Trassinelli (2) , Nacer Adrouche (2) , C. Szabo (3) , Paul Indelicato (3) , F. Haranger (2) , Jean-Michel Isac (3) , Emily Lamour (2) , Eric-Olivier Le Bigot (3) , Jacques Merot (2) , Christophe Prigent (2) , Jean-Pierre Rozet (2) , Dominique Vernhet (2)

1 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
2 INSP - Institut des Nanosciences de Paris
3 LKB (Jussieu) - Laboratoire Kastler Brossel

We have performed a systematic study of the Bremsstrahlung emission from the electrons in the plasma of a commercial 14.5 GHz Electron-Cyclotron Resonance Ion Source. The electronic spectral temperature and the product of ionic and electronic densities of the plasma are measured by analyzing the Bremsstrahlung spectra recorded for several rare gases (Ar, Kr, Xe) as a function of the injected power. Within our uncertainty, we find an average temperature of ≈ 48 keV above 100W, with a weak dependency on the injected power and gas composition. Charge state distributions of extracted ion beams have been determined as well, providing a way to disentangle the ionic density from the electronic density. Moreover X-ray emission from highly charged argon ions in the plasma has been observed with a high-resolution mosaic crystal spectrometer, demonstrating the feasibility for high-precision measurements of transition energies of highly charged ions, in particular of the magnetic dipole (M1) transition of He-like of argon ions.

Domaines: Physique des plasmas [physics.plasm-ph]; Instrumentations et Détecteurs [physics.ins-det]; Physique Atomique [physics.atom-ph]

Alexander Gumberidze, Martino Trassinelli, Nacer Adrouche, C. Szabo, Paul Indelicato, et al.. Electronic temperatures, densities and plasma X-ray emission of a 14.5 GHz Electron-Cyclotron Resonance Ion Source. Review of Scientific Instruments, 2010, 81, pp.033303. ⟨10.1063/1.3316805⟩. ⟨hal-00459174⟩