Some particular aspects of the physics of the ECR sources for multicharged ions

Melin, G.; Bourg, F.; Briand, P.; Debernardi, J.; Delaunay, M.; Geller, R.; Jacquot, B.; Ludwig, Peter; Nguyen, Tram; Pin, L.; Pontonnier, M.; Rocco, J.C.; Zadworny, F.

doi:10.1063/1.1141305

Cited by 64 publications

(24 citation statements)

References 4 publications

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“…A "cold" plasma core (E<2 keV) is populated by low energy electrons, while the warmer particles (2<E<30 keV) form an envelope in the "equatorial" region. The figure shows that the most part of electrons that are lost are actually cold, and flow away from the plasma along the chamber axis (this is consistent with well-known effects in ECRIS like the bias-disk mechanism [22]). The warm electrons, instead, concentrate in the near resonance region, forming a hollow structure.…”

Section: Discussion and Comparison With Simulationssupporting

confidence: 69%

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Rácz

Biri

Caliri

et al. 2017

Plasma Sources Sci. Technol.

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Pinhole and CCD based quasi-optical X-ray imaging technique was applied to investigate the plasma of an Electron Cyclotron Resonance Ion Source. Spectrally integrated and energy resolved images were taken from an axial perspective. The comparison of integrated images taken of argon plasma highlights the structural changes affected by some ECRIS setting parameters, like strength of the axial magnetic confinement, RF frequency and microwave power. Photon counting analysis gives precise intensity distribution of the X-ray emitted by the argon plasma and by the plasma chamber walls. This advanced technique points out that the spatial positions of the electron losses are strongly determined by the kinetic energy of the electrons themselves to be lost and also shows evidences how strongly the plasma distribution is affected by slight changes in the RF frequency.

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Section: Discussion and Comparison With Simulationssupporting

confidence: 69%

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Rácz

Biri

Caliri

et al. 2017

Plasma Sources Sci. Technol.

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“…The effect is pronounced at the peripheral parts of the beam. The timescales of the abrupt drop and the subsequent maximum are similar to those observed in the afterglow 5,6 of ECRIS plasmas.…”

Section: Resultssupporting

confidence: 66%

Transverse distribution of beam current oscillations of a 14 GHz electron cyclotron resonance ion source

Tarvainen

Toivanen

Komppula

et al. 2013

Review of Scientific Instruments

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The temporal stability of oxygen ion beams has been studied with the 14 GHz A-ECR at JYFL (University of Jyvaskyla, Department of Physics). A sector Faraday cup was employed to measure the distribution of the beam current oscillations across the beam profile. The spatial and temporal characteristics of two different oscillation "modes" often observed with the JYFL 14 GHz ECRIS are discussed. It was observed that the low frequency oscillations below 200 Hz are distributed almost uniformly. In the high frequency oscillation "mode," with frequencies >300 Hz at the core of the beam, carrying most of the current, oscillates with smaller amplitude than the peripheral parts of the beam. The results help to explain differences observed between the two oscillation modes in terms of the transport efficiency through the JYFL K-130 cyclotron. The dependence of the oscillation pattern on ion source parameters is a strong indication that the mechanisms driving the fluctuations are plasma effects.

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“…For instance, in our group, spectroscopic measurements with SiLl detectors have been performed by Paul Briand on the 16 GHz MINIMAFIOS facility [6] with different gases. When looking on the axis of the ECRIS, the K~ and K~ lines of krypton are easily monitored with different RF power levels and the FWHM are plotted.…”

Section: Basic Ingredients and Mechanisms Of Ecrismentioning

confidence: 99%

ECRIS: the electron cyclotron resonance ion sources — (status)

Geller

1991

Z Phys D - Atoms, Molecules and Clusters

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Some particular aspects of the physics of the ECR sources for multicharged ions

Abstract: This article emphasizes a confinement model for electrons and ions in an ECR source for multicharged ions, on the basis of specific measurements performed on the 16.6 GHz MINIMAFIOS and 10 GHz CAPRICE facilities. The conclusions partially support the above model.

Cited by 64 publications

References 4 publications

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Transverse distribution of beam current oscillations of a 14 GHz electron cyclotron resonance ion source

ECRIS: the electron cyclotron resonance ion sources — (status)

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