Multi-strap in-port ICRF antenna modeling and development in support of ITER and EU-DEMO

Volodymyr Bobkov; Roberto Bilato; François Calarco; Helmut Faugel; Oleksii Girka; Walid Helou; Philippe Lamalle; Vincent Maquet; Daniele Milanesio; Roman Ochoukov; Vincent Polli; Wouter Tierens; Maria Usoltseva; Wei Zhang

doi:10.1063/5.0163035

Multi-strap in-port ICRF antenna modeling and development in support of ITER and EU-DEMO

Volodymyr Bobkov, Roberto Bilato, François Calarco, Helmut Faugel, Oleksii Girka, Walid Helou, Philippe Lamalle, Vincent Maquet, Daniele Milanesio, Roman Ochoukov, Vincent Polli, Wouter Tierens, Maria Usoltseva, Wei Zhang

Research output: Contribution to journal › Conference article › peer-review

Abstract

Full-size 3D model of ITER ICRF antenna with 1D plasma electron density (ne) and 3D ne (from EMC3-Eirene) was simulated using the RAPLICASOL (COMSOL-based) code. Impedance matrices and coupled power agree well with TOPICA with 1D ne. Cases with 3D ne show port-to-port differences compared to 1D ne, as well as a lower (about 10%) coupled power. Efficient minimization of ITER antenna near-fields (to reduce RF sheaths by optimizing feeding) calculated by TOPICA and RAPLICASOL is possible with [0;π;π;0] (about balanced strap powers) and is even lower with [0;π;0;π] toroidal phasing (with dominant power from central straps). Lowest near-fields are with [0;π] poloidal phasing, but [0;-π/2] will be used in a load resilience setup with 3dB splitters. Under EUROfusion prospective research and development, in-port ICRF antenna concept for EU-DEMO with 8 quadruplets (4x toroidal by 2x poloidal) is considered to deliver 16.7 MW (3 antennas yielding 50 MW). Areas around the equatorial port and cut-ins in breeding blankets are used, with emphasis on [0;π;π;0] optimization. High-resolution RAPLICASOL calculations with full ne profile (without imposing a minimum ne value) shed light on field distribution with propagative slow wave in detailed antenna geometry.

Original language	English
Article number	060010
Journal	AIP Conference Proceedings
Volume	2984
Issue number	1
DOIs	https://doi.org/10.1063/5.0163035
State	Published - Aug 18 2023
Externally published	Yes
Event	24th Topical Conference on Radio-frequency Power in Plasmas - Annapolis, United States Duration: Sep 26 2022 → Sep 28 2022

Funding

The work presented in section 2.3 has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.

Funders	Funder number
European Commission	101052200 — EUROfusion

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1063/5.0163035

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title = "Multi-strap in-port ICRF antenna modeling and development in support of ITER and EU-DEMO",

abstract = "Full-size 3D model of ITER ICRF antenna with 1D plasma electron density (ne) and 3D ne (from EMC3-Eirene) was simulated using the RAPLICASOL (COMSOL-based) code. Impedance matrices and coupled power agree well with TOPICA with 1D ne. Cases with 3D ne show port-to-port differences compared to 1D ne, as well as a lower (about 10%) coupled power. Efficient minimization of ITER antenna near-fields (to reduce RF sheaths by optimizing feeding) calculated by TOPICA and RAPLICASOL is possible with [0;π;π;0] (about balanced strap powers) and is even lower with [0;π;0;π] toroidal phasing (with dominant power from central straps). Lowest near-fields are with [0;π] poloidal phasing, but [0;-π/2] will be used in a load resilience setup with 3dB splitters. Under EUROfusion prospective research and development, in-port ICRF antenna concept for EU-DEMO with 8 quadruplets (4x toroidal by 2x poloidal) is considered to deliver 16.7 MW (3 antennas yielding 50 MW). Areas around the equatorial port and cut-ins in breeding blankets are used, with emphasis on [0;π;π;0] optimization. High-resolution RAPLICASOL calculations with full ne profile (without imposing a minimum ne value) shed light on field distribution with propagative slow wave in detailed antenna geometry.",

author = "Volodymyr Bobkov and Roberto Bilato and Fran{\c c}ois Calarco and Helmut Faugel and Oleksii Girka and Walid Helou and Philippe Lamalle and Vincent Maquet and Daniele Milanesio and Roman Ochoukov and Vincent Polli and Wouter Tierens and Maria Usoltseva and Wei Zhang",

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doi = "10.1063/5.0163035",

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T1 - Multi-strap in-port ICRF antenna modeling and development in support of ITER and EU-DEMO

AU - Bobkov, Volodymyr

AU - Bilato, Roberto

AU - Calarco, François

AU - Faugel, Helmut

AU - Girka, Oleksii

AU - Helou, Walid

AU - Lamalle, Philippe

AU - Maquet, Vincent

AU - Milanesio, Daniele

AU - Ochoukov, Roman

AU - Polli, Vincent

AU - Tierens, Wouter

AU - Usoltseva, Maria

AU - Zhang, Wei

PY - 2023/8/18

Y1 - 2023/8/18

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AB - Full-size 3D model of ITER ICRF antenna with 1D plasma electron density (ne) and 3D ne (from EMC3-Eirene) was simulated using the RAPLICASOL (COMSOL-based) code. Impedance matrices and coupled power agree well with TOPICA with 1D ne. Cases with 3D ne show port-to-port differences compared to 1D ne, as well as a lower (about 10%) coupled power. Efficient minimization of ITER antenna near-fields (to reduce RF sheaths by optimizing feeding) calculated by TOPICA and RAPLICASOL is possible with [0;π;π;0] (about balanced strap powers) and is even lower with [0;π;0;π] toroidal phasing (with dominant power from central straps). Lowest near-fields are with [0;π] poloidal phasing, but [0;-π/2] will be used in a load resilience setup with 3dB splitters. Under EUROfusion prospective research and development, in-port ICRF antenna concept for EU-DEMO with 8 quadruplets (4x toroidal by 2x poloidal) is considered to deliver 16.7 MW (3 antennas yielding 50 MW). Areas around the equatorial port and cut-ins in breeding blankets are used, with emphasis on [0;π;π;0] optimization. High-resolution RAPLICASOL calculations with full ne profile (without imposing a minimum ne value) shed light on field distribution with propagative slow wave in detailed antenna geometry.

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Y2 - 26 September 2022 through 28 September 2022

ER -

Multi-strap in-port ICRF antenna modeling and development in support of ITER and EU-DEMO

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Funding

UN SDGs

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