Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source
FNS-ST is a fusion neutron source project based on a spherical tokamak (R/a = 0.5 m/0.3 m) with a steady-state neutron generation of ~10<sup>18</sup> n/s. Neutral beam injection (NBI) is supposed to maintain steady-state operation, non-inductive current drive and neutron production in FN...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/17/8404 |
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| author | Eugenia Dlougach Alexander Panasenkov Boris Kuteev Arkady Serikov |
| author_facet | Eugenia Dlougach Alexander Panasenkov Boris Kuteev Arkady Serikov |
| author_sort | Eugenia Dlougach |
| collection | DOAJ |
| description | FNS-ST is a fusion neutron source project based on a spherical tokamak (R/a = 0.5 m/0.3 m) with a steady-state neutron generation of ~10<sup>18</sup> n/s. Neutral beam injection (NBI) is supposed to maintain steady-state operation, non-inductive current drive and neutron production in FNS-ST plasma. In a low aspect ratio device, the toroidal magnetic field shape is not optimal for fast ions confinement in plasma, and the toroidal effects are more pronounced compared to the conventional tokamak design (with R/a > 2.5). The neutral beam production and the tokamak plasma response to NBI were efficiently modeled by a specialized beam-plasma software package BTR-BTOR, which allowed fast optimization of the neutral beam transport and evolution within the injector unit, as well as the parametric study of NBI induced effects in plasma. The “Lite neutral beam model” (LNB) implements a statistical beam description in 6-dimensional phase space (10<sup>6</sup>–10<sup>10</sup> particles), and the beam particle conversions are organized as a data flow pipeline. This parametric study of FNS-ST tokamak is focused on the beam-plasma coupling issue. The main result of the study is a method to achieve steady-state current drive and fusion controllability in beam-driven toroidal plasmas. LNB methods can be also applied to NBI design for conventional tokamaks. |
| first_indexed | 2024-03-10T03:05:50Z |
| format | Article |
| id | doaj.art-938d5d099fe64937b0dcb3b71141db77 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:05:50Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-938d5d099fe64937b0dcb3b71141db772023-11-23T12:38:58ZengMDPI AGApplied Sciences2076-34172022-08-011217840410.3390/app12178404Neutral Beam Coupling with Plasma in a Compact Fusion Neutron SourceEugenia Dlougach0Alexander Panasenkov1Boris Kuteev2Arkady Serikov3NRC Kurchatov Institute, 123182 Moscow, RussiaNRC Kurchatov Institute, 123182 Moscow, RussiaNRC Kurchatov Institute, 123182 Moscow, RussiaKarlsruhe Institute of Technology (KIT), Institute for Neutron Physics and Reactor Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyFNS-ST is a fusion neutron source project based on a spherical tokamak (R/a = 0.5 m/0.3 m) with a steady-state neutron generation of ~10<sup>18</sup> n/s. Neutral beam injection (NBI) is supposed to maintain steady-state operation, non-inductive current drive and neutron production in FNS-ST plasma. In a low aspect ratio device, the toroidal magnetic field shape is not optimal for fast ions confinement in plasma, and the toroidal effects are more pronounced compared to the conventional tokamak design (with R/a > 2.5). The neutral beam production and the tokamak plasma response to NBI were efficiently modeled by a specialized beam-plasma software package BTR-BTOR, which allowed fast optimization of the neutral beam transport and evolution within the injector unit, as well as the parametric study of NBI induced effects in plasma. The “Lite neutral beam model” (LNB) implements a statistical beam description in 6-dimensional phase space (10<sup>6</sup>–10<sup>10</sup> particles), and the beam particle conversions are organized as a data flow pipeline. This parametric study of FNS-ST tokamak is focused on the beam-plasma coupling issue. The main result of the study is a method to achieve steady-state current drive and fusion controllability in beam-driven toroidal plasmas. LNB methods can be also applied to NBI design for conventional tokamaks.https://www.mdpi.com/2076-3417/12/17/8404fusion neutron sourcespherical tokamakneutral beam injectioncurrent driveneutron yieldlite beam model |
| spellingShingle | Eugenia Dlougach Alexander Panasenkov Boris Kuteev Arkady Serikov Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source Applied Sciences fusion neutron source spherical tokamak neutral beam injection current drive neutron yield lite beam model |
| title | Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source |
| title_full | Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source |
| title_fullStr | Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source |
| title_full_unstemmed | Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source |
| title_short | Neutral Beam Coupling with Plasma in a Compact Fusion Neutron Source |
| title_sort | neutral beam coupling with plasma in a compact fusion neutron source |
| topic | fusion neutron source spherical tokamak neutral beam injection current drive neutron yield lite beam model |
| url | https://www.mdpi.com/2076-3417/12/17/8404 |
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