Analysis of the coupling characteristics of ion cyclotron resonance heating antenna of small tokamak with the help of 2D and 3D antenna codes
An analytical and numerical study of the coupling of strip-line antenna with small tokamak plasma is presented with the help of the ICRH antenna code SITAR (Simulation of ICRH anTennaA Resistance). The antenna is of finite poloidal and toroidal dimensions and screened from the plasma by a metal scre...
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Published in | Pramāṇa Vol. 97; no. 3 |
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Format | Journal Article |
Language | English |
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New Delhi
Springer India
09.08.2023
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Abstract | An analytical and numerical study of the coupling of strip-line antenna with small tokamak plasma is presented with the help of the ICRH antenna code SITAR (Simulation of ICRH anTennaA Resistance). The antenna is of finite poloidal and toroidal dimensions and screened from the plasma by a metal screen of anisotropic conductivity that shorts out the toroidal components of radio frequency electric field. A linear model of refractive index in plasma evanescent region has been considered to describe the propagation of wave in it. The plasma in the coupling region is described by cold plasma dielectric tensors with non-uniform density and toroidal magnetic field along the radial direction. Inclusion of finite antenna length, antenna lead currents as well as toroidal and poloidal variation of current in it (3D analysis) introduces an important difference in the antenna load resistance and inductance compared to those calculations when lead current is ignored and plasma is assumed to be invariant along the poloidal direction (2D analysis). The effect of plasma density, antenna length, wall and plasma edge distances on antenna load resistance and inductance has been studied using parameters of Aditya-U and SST-1 tokamaks. |
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AbstractList | An analytical and numerical study of the coupling of strip-line antenna with small tokamak plasma is presented with the help of the ICRH antenna code SITAR (Simulation of ICRH anTennaA Resistance). The antenna is of finite poloidal and toroidal dimensions and screened from the plasma by a metal screen of anisotropic conductivity that shorts out the toroidal components of radio frequency electric field. A linear model of refractive index in plasma evanescent region has been considered to describe the propagation of wave in it. The plasma in the coupling region is described by cold plasma dielectric tensors with non-uniform density and toroidal magnetic field along the radial direction. Inclusion of finite antenna length, antenna lead currents as well as toroidal and poloidal variation of current in it (3D analysis) introduces an important difference in the antenna load resistance and inductance compared to those calculations when lead current is ignored and plasma is assumed to be invariant along the poloidal direction (2D analysis). The effect of plasma density, antenna length, wall and plasma edge distances on antenna load resistance and inductance has been studied using parameters of Aditya-U and SST-1 tokamaks. |
ArticleNumber | 125 |
Author | Chattopadhyay, Asim Kumar |
Author_xml | – sequence: 1 givenname: Asim Kumar orcidid: 0000-0003-0831-8497 surname: Chattopadhyay fullname: Chattopadhyay, Asim Kumar email: akc.asim@gmail.com organization: Institute for Plasma Research, Homi Bhabha National Institute (HBNI) |
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Cites_doi | 10.1088/0029-5515/40/6/305 10.1088/0741-3335/31/5/004 10.13182/FST12-A13519 10.1088/1741-4326/ab0a9e 10.1088/0029-5515/36/2/I08 10.1088/0029-5515/30/4/001 10.1016/B978-1-4832-8373-9.50058-6 10.1088/0029-5515/46/7/S10 10.1109/TPS.2023.3253139 10.1016/S0010-4655(02)00269-2 10.1093/oso/9780198559566.001.0001 10.1088/0029-5515/24/6/001 10.1088/0029-5515/22/2/011 10.1080/15361055.2020.1843866 10.1088/0029-5515/50/2/025026 |
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Keywords | 52.55.Fa ICRF antenna code 52.50.Qt Aditya-U and SST-1 antenna coupling simulation of ICRH antenna resistance strip-line antenna 52.40.Fd SITAR |
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Title | Analysis of the coupling characteristics of ion cyclotron resonance heating antenna of small tokamak with the help of 2D and 3D antenna codes |
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