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- W4377087858 abstract "Abstract Neutral beam injection in tokamaks produces a population of fast ions, which interact with 3D magnetic fields in a variety of ways, often resulting in energetic particle losses in very short times to the wall. Careful design of neutral beams and active control of error fields helps to keep these losses to a minimum. Nevertheless, past experience in tokamaks in the 1980s and detailed simulations for future machines, such as International Thermonuclear Experimental Reactor, suggest that very localized fast ion losses (‘hot spots’) can be present, even if the overall losses are low. In this paper, we discuss this issue in the Divertor Tokamak Test (DTT) project, and we show that in the standard single-null full-power scenario of the DTT, fast ions produce two hot spots, corresponding approximately to the beam injection and exit toroidal angles: the former being mainly due to prompt losses/passing particles, while the latter is due to trapped ions. However, the maximum power load in these spots is of the order <?CDATA ${sim}63$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:mrow> <mml:mo>∼</mml:mo> </mml:mrow> <mml:mn>63</mml:mn> </mml:math> kW m −2 , below the tolerance of plasma-facing components of the machine." @default.
- W4377087858 created "2023-05-20" @default.
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- W4377087858 date "2023-06-09" @default.
- W4377087858 modified "2023-10-17" @default.
- W4377087858 title "ORBIT simulations of fast ion power loads on the wall of the Divertor Tokamak Test" @default.
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- W4377087858 doi "https://doi.org/10.1088/1361-6587/acd71d" @default.
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