Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source
The design of a microwave antenna sustaining a high-energy-content plasma in Electron Cyclotron Resonance Ion Sources (ECRISs) is, under many aspects, similar to the design of a conventional antenna but presenting also peculiarities because of the antenna lying in a cavity filled by an anisotropic p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Telecom |
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| Online Access: | https://www.mdpi.com/2673-4001/2/1/4 |
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| author | Giorgio Sebastiano Mauro Giuseppe Torrisi Ornella Leonardi Angelo Pidatella Gino Sorbello David Mascali |
| author_facet | Giorgio Sebastiano Mauro Giuseppe Torrisi Ornella Leonardi Angelo Pidatella Gino Sorbello David Mascali |
| author_sort | Giorgio Sebastiano Mauro |
| collection | DOAJ |
| description | The design of a microwave antenna sustaining a high-energy-content plasma in Electron Cyclotron Resonance Ion Sources (ECRISs) is, under many aspects, similar to the design of a conventional antenna but presenting also peculiarities because of the antenna lying in a cavity filled by an anisotropic plasma. The plasma chamber and microwave injection system design plays a critical role in the development of future ECRISs. In this paper, we present the numerical study of an unconventionally shaped plasma cavity, in which its geometry is inspired by the typical star-shaped ECR plasma, determined by the electrons trajectories as they move under the influence of the plasma-confining magnetic field. The cavity has been designed by using CST Studio Suite with the aim to maximize the on-axis electric field, thus increasing the wave-to-plasma absorption. As a second step, an innovative microwave injection system based on side-coupled slotted waveguides is presented. This new launching scheme allows an uniform power distribution inside the plasma cavity which could lead to an increase of ion source performances in terms of charge states and extracted currents when compared to the conventional axial microwave launch scheme. Finally, the use of both the “plasma-shaped” cavity and the microwave side coupled scheme could make the overall setup more compact. |
| first_indexed | 2024-03-09T05:06:48Z |
| format | Article |
| id | doaj.art-3b962f552ce748a980520b4c26486a3e |
| institution | Directory Open Access Journal |
| issn | 2673-4001 |
| language | English |
| last_indexed | 2024-03-09T05:06:48Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Telecom |
| spelling | doaj.art-3b962f552ce748a980520b4c26486a3e2023-12-03T12:53:43ZengMDPI AGTelecom2673-40012021-02-0121425110.3390/telecom2010004Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion SourceGiorgio Sebastiano Mauro0Giuseppe Torrisi1Ornella Leonardi2Angelo Pidatella3Gino Sorbello4David Mascali5Istituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, ItalyIstituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, ItalyIstituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, ItalyIstituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, ItalyIstituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, ItalyIstituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN-LNS), Via S. Sofia 62, 95123 Catania, ItalyThe design of a microwave antenna sustaining a high-energy-content plasma in Electron Cyclotron Resonance Ion Sources (ECRISs) is, under many aspects, similar to the design of a conventional antenna but presenting also peculiarities because of the antenna lying in a cavity filled by an anisotropic plasma. The plasma chamber and microwave injection system design plays a critical role in the development of future ECRISs. In this paper, we present the numerical study of an unconventionally shaped plasma cavity, in which its geometry is inspired by the typical star-shaped ECR plasma, determined by the electrons trajectories as they move under the influence of the plasma-confining magnetic field. The cavity has been designed by using CST Studio Suite with the aim to maximize the on-axis electric field, thus increasing the wave-to-plasma absorption. As a second step, an innovative microwave injection system based on side-coupled slotted waveguides is presented. This new launching scheme allows an uniform power distribution inside the plasma cavity which could lead to an increase of ion source performances in terms of charge states and extracted currents when compared to the conventional axial microwave launch scheme. Finally, the use of both the “plasma-shaped” cavity and the microwave side coupled scheme could make the overall setup more compact.https://www.mdpi.com/2673-4001/2/1/4slotted waveguide antennawaveguide couplerwave-plasma couplingresonant cavityElectron Cyclotron Resonance Ion Sources (ECRIS) |
| spellingShingle | Giorgio Sebastiano Mauro Giuseppe Torrisi Ornella Leonardi Angelo Pidatella Gino Sorbello David Mascali Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source Telecom slotted waveguide antenna waveguide coupler wave-plasma coupling resonant cavity Electron Cyclotron Resonance Ion Sources (ECRIS) |
| title | Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source |
| title_full | Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source |
| title_fullStr | Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source |
| title_full_unstemmed | Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source |
| title_short | Design and Analysis of Slotted Waveguide Antenna Radiating in a “Plasma-Shaped” Cavity of an ECR Ion Source |
| title_sort | design and analysis of slotted waveguide antenna radiating in a plasma shaped cavity of an ecr ion source |
| topic | slotted waveguide antenna waveguide coupler wave-plasma coupling resonant cavity Electron Cyclotron Resonance Ion Sources (ECRIS) |
| url | https://www.mdpi.com/2673-4001/2/1/4 |
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