ECRIS2020 - List of Keywords (GUI)

Paper	Title	Other Keywords	Page
TUYZO02	A Guiding Centre Approximation Approach for Simulation Electron Trajectories in ECR and Microwave Ion Sources	electron, ion-source, plasma, ECR	84
	J.A. Méndez, T. Thuillier LPSC, Grenoble Cedex, France T. Minea CNRS LPGP Univ Paris Sud, Orsay, France
	Funding: Work supported by the CNRS under the 80\|PRIME grant This work presents a study on the feasibility of the implementation of the guiding centre (GC) approach in electron cyclotron resonance (ECR) ion sources, with the goal of speeding up the electron’s orbit integration in certain regimes. It is shown that the GC approximation reproduces accurately the trajectory drifts and periodic behaviour of electrons in the minimum-B field. A typical electron orbit far enough from the source’s axis is well reproduced for 1 µs of propagation time, with the GC time-step constrained below 100 ps, giving one order of magnitude gain in computation time with respect to Boris. For an electron orbit close to the axis a disphasement of the electron’s trajectory is observed, but the spatial envelope is conserved. A comparative study analyses electron trajectories in a flatter B-field, that in a microwave discharge ion source, where this method’s drawbacks may be avoided given a smaller magnetic field gradient and a shorter electron lifetime in the plasma chamber. In this regime electron trajectories were very well reproduced by the GC approximation. The time-step was constrained below 10 ns, providing up to 30 times faster integration compared to Boris.
	Slides TUYZO02 [5.829 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-TUYZO02
About •	Received ※ 28 September 2020 — Revised ※ 21 December 2020 — Accepted ※ 18 May 2021 — Issue date ※ 02 February 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUYZO03	Electromagnetic Simulation of "plasma-shaped" Plasma Chamber for Innovative ECRIS	cavity, plasma, injection, ECR	90
	G.S. Mauro, O. Leonardi, D. Mascali, A. Pidatella, F. Russo, G. Sorbello, G. Torrisi INFN/LNS, Catania, Italy A. Galatà, C.S. Gallo INFN/LNL, Legnaro (PD), Italy C.S. Gallo UNIFE, Ferrara, Italy G. Sorbello University of Catania, Catania, Italy
	The plasma chamber and injection system design play a fundamental role in ECRISs with the aim to obtain an optimized electromagnetic field configuration able to generate and sustain a plasma with a high energy content. In this work we present the numerical study and the design of an unconventionally-shaped cavity resonator* that possesses some key advantages with respect to the standard cylindrical cavities, usually adopted in ion sources setups. The cavity geometry, whose design has been completed on January 2020, has been inspired by the typical star-shaped ECR plasma, determined by the magnetic field structure. The chamber has been designed by using the commercial softwares CST and COMSOL, with the aim to maximize the on-axis electric field. Moreover, a radically innovative microwaves injection system, consisting in side-coupled slotted waveguides, has been implemented, allowing a better power coupling and a more symmetric power distribution inside the cavity with respect to the standard rectangular waveguides. This new ’plasma-shaped oriented’ design could relevantly improve the performances of the ECRISs while making more compact the overall setup. *This work has been carried out within the Grant 73/IRIS project, supported by INFN (Italian patent pending n. 102020000001756).
	Slides TUYZO03 [5.119 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-TUYZO03
About •	Received ※ 28 September 2020 — Revised ※ 05 October 2020 — Accepted ※ 18 May 2021 — Issue date ※ 10 December 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUYZO02

A Guiding Centre Approximation Approach for Simulation Electron Trajectories in ECR and Microwave Ion Sources

electron, ion-source, plasma, ECR

84

J.A. Méndez, T. Thuillier
LPSC, Grenoble Cedex, France
T. Minea
CNRS LPGP Univ Paris Sud, Orsay, France

Funding: Work supported by the CNRS under the 80|PRIME grant
This work presents a study on the feasibility of the implementation of the guiding centre (GC) approach in electron cyclotron resonance (ECR) ion sources, with the goal of speeding up the electron’s orbit integration in certain regimes. It is shown that the GC approximation reproduces accurately the trajectory drifts and periodic behaviour of electrons in the minimum-B field. A typical electron orbit far enough from the source’s axis is well reproduced for 1 µs of propagation time, with the GC time-step constrained below 100 ps, giving one order of magnitude gain in computation time with respect to Boris. For an electron orbit close to the axis a disphasement of the electron’s trajectory is observed, but the spatial envelope is conserved. A comparative study analyses electron trajectories in a flatter B-field, that in a microwave discharge ion source, where this method’s drawbacks may be avoided given a smaller magnetic field gradient and a shorter electron lifetime in the plasma chamber. In this regime electron trajectories were very well reproduced by the GC approximation. The time-step was constrained below 10 ns, providing up to 30 times faster integration compared to Boris.

Slides TUYZO02 [5.829 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-TUYZO02

About •

Received ※ 28 September 2020 — Revised ※ 21 December 2020 — Accepted ※ 18 May 2021 — Issue date ※ 02 February 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUYZO03

Electromagnetic Simulation of "plasma-shaped" Plasma Chamber for Innovative ECRIS

cavity, plasma, injection, ECR

90

G.S. Mauro, O. Leonardi, D. Mascali, A. Pidatella, F. Russo, G. Sorbello, G. Torrisi
INFN/LNS, Catania, Italy
A. Galatà, C.S. Gallo
INFN/LNL, Legnaro (PD), Italy
C.S. Gallo
UNIFE, Ferrara, Italy
G. Sorbello
University of Catania, Catania, Italy

The plasma chamber and injection system design play a fundamental role in ECRISs with the aim to obtain an optimized electromagnetic field configuration able to generate and sustain a plasma with a high energy content. In this work we present the numerical study and the design of an unconventionally-shaped cavity resonator* that possesses some key advantages with respect to the standard cylindrical cavities, usually adopted in ion sources setups. The cavity geometry, whose design has been completed on January 2020, has been inspired by the typical star-shaped ECR plasma, determined by the magnetic field structure. The chamber has been designed by using the commercial softwares CST and COMSOL, with the aim to maximize the on-axis electric field. Moreover, a radically innovative microwaves injection system, consisting in side-coupled slotted waveguides, has been implemented, allowing a better power coupling and a more symmetric power distribution inside the cavity with respect to the standard rectangular waveguides. This new ’plasma-shaped oriented’ design could relevantly improve the performances of the ECRISs while making more compact the overall setup.
*This work has been carried out within the Grant 73/IRIS project, supported by INFN (Italian patent pending n. 102020000001756).

Slides TUYZO03 [5.119 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-TUYZO03

About •

Received ※ 28 September 2020 — Revised ※ 05 October 2020 — Accepted ※ 18 May 2021 — Issue date ※ 10 December 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)