A new launching scheme for ECR plasma based on two‐waveguides‐array

Torrisi, G.; Sorbello, G.; Leonardi, O.; Celona, L.; Gammino, S.

doi:10.1002/mop.30117

Cited by 18 publications

(17 citation statements)

References 7 publications

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“…The results illustrated along the paper, therefore, suggest revising the microwave power deposition mechanism, trying to maximize the absorption of the RF power into the plasma core [19].…”

Section: Discussion and Comparison With Simulationsmentioning

confidence: 99%

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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“…The results illustrated along the paper, therefore, suggest revising the microwave power deposition mechanism, trying to maximize the absorption of the RF power into the plasma core [19].…”

Section: Discussion and Comparison With Simulationsmentioning

confidence: 99%

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

Rácz

Biri

Caliri

et al. 2017

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…the plasma chamber). However, the single-pass RF energy absorption efficiency is rather poor, and it is still difficult to drive energy deposition to specific parts of [52] electron population in the phase space. In PANDORA we propose a "microwave absorption optimization-oriented" design based on a highly controlled electromagnetic radiation by the RF launcher system.…”

Section: The Pandora Plasma-trapmentioning

confidence: 99%

PANDORA, a new facility for interdisciplinary in-plasma physics

et al. 2017

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PANDORA, Plasmas for Astrophysics, Nuclear Decays Observation and Radiation for Archaeometry, is planned as a groundbreaking new facility based on a state-of-the-art plasma trap confining extremely energetic plasma for performing interdisciplinary research in the fields of Nuclear Astrophysics, Astrophysics, Plasma Physics and Applications in Material Science and Archaeometry: the plasmas become the environment for measuring, for the first time, nuclear decays rates in stellar-like condition (such as 7 Be decay and beta-decay involved in s-process nucleosynthesis), especially as a function of the ionization state of the plasma ions. These studies are of paramount importance for addressing several astrophysical issues in both stellar and primordial nucleosynthesis environment (e.g. determination of solar neutrino flux and 7 Li Cosmological Problem), moreover the confined energetic plasma will be a unique light source for high performance stellar spectroscopy measurements in the visible, UV and X-ray domains, offering advancements in observational astronomy. As to magnetic fields, the experimental validation of theoretical first and second order Landé factors will drive the layout of next generation polarimetric units for the high resolution spectrograph of the future giant telescopes. In PANDORA new plasma heating methods will be explored, that will push forward the ion beam output, in terms of extracted intensity and charge states. More, advanced and optimized injection methods of ions in an ECR plasma will be experimented, with the aim at optimizing its capture efficiency. This will be applied to the ECR-based Charge Breeding technique, that will improve the performances of the SPES ISOL-facility currently installed at Laboratori Nazionali di Legnaro-INFN. Finally, PANDORA will be suitable for energy conversion, making the plasma as an exceptional source of electromagnetic radiation, for applications in Material Science and Archaeometry. PACS. 52.72.+v Laboratory studies of space-and astrophysical-plasma processes -26. Nuclear Astrophysics -23.40.-s Beta decay; Electron Capture -95.55.Qf Photometric, polarimetric and spectroscopic instrumentation -52.50.-b Plasma production and heating -52.65.-y Plasma simulation -52.70.-m Plasma diagnostics techniques and instrumentation

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“…The idea is to sustain the peaked-profile plasma thanks to the axial microwave injection at frequency f 1 ; then using the radial microwave port in order to inject an O-mode wave at the second harmonic frequency f 2 =2f 1 . A dedicate launcher -with orientable emission lobe [16,17] -has been developed on purpose in order to establish proper OXB scenarios. However, in terms of modelling, we need to go beyond cold-plasma approximation.…”

Section: "Hot-plasma" Modelmentioning

confidence: 99%

Modelling RF-plasma interaction in ECR ion sources

et al. 2017

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Abstract. This paper describes three-dimensional self-consistent numerical simulations of wave propagation in magnetoplasmas of Electron cyclotron resonance ion sources (ECRIS). Numerical results can give useful information on the distribution of the absorbed RF power and/or efficiency of RF heating, especially in the case of alternative schemes such as mode-conversion based heating scenarios. Ray-tracing approximation is allowed only for small wavelength compared to the system scale lengths: as a consequence, full-wave solutions of Maxwell-Vlasov equation must be taken into account in compact and strongly inhomogeneous ECRIS plasmas. This contribution presents a multi-scale temporal domains approach for simultaneously including RF dynamics and plasma kinetics in a "cold-plasma", and some perspectives for "hot-plasma" implementation. The presented results rely with the attempt to establish a modal-conversion scenario of OXB-type in double frequency heating inside an ECRIS testbench.

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A new launching scheme for ECR plasma based on two‐waveguides‐array

Cited by 18 publications

References 7 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

PANDORA, a new facility for interdisciplinary in-plasma physics

Modelling RF-plasma interaction in ECR ion sources

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