scholarly journals Analyzing Fast-ions Trajectories in a Nuclear Fusion Reactor through Its Poincaré-Island Size and Ripple Resonance

2021 ◽  
Vol 3 (2) ◽  
pp. 68-78
Author(s):  
Anggi Kurniawan ◽  
Hiroaki Tsutsui
Keyword(s):  
Energy Production ◽  
Fusion Reactor ◽  
Nuclear Fusion ◽  
Fusion Reactors ◽  
Island Size ◽  
Nuclear Fusion Reactor ◽  
Fast Ions ◽  
Burning Plasma ◽  
Engineering Aspect ◽  
Fast Ion

Fast-ions confinement is a prominent subject in developing nuclear fusion reactors due to its importance in sustaining the burning plasma and keeping energy production. However, confining them has proven to be difficult until now, and one of the reasons is that the inherent discrete magnetic field produces a magnetic ripple. A better understanding of fast-ions transport using appropriate numerical calculation tools needs to be developed to overcome such a challenge in the engineering aspect. This study revisited data collection of fast ion transport simulated under the ripple presence in a nuclear fusion device. The ion trajectories were followed using two orbit-following equation schemes, and the ripple-resonance island size in the Poincaré section was compared. The result showed that the island size obtained by each scheme was different when the particle resonates with a stronger ripple field and, proportionally, the diffusion coefficients are different. The physical meaning and consequence behind this discovery were discussed in this paper.

scholarly journals Heat-Absorbing Capacity of High-Heat-Flux Components in Nuclear Fusion Reactors

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3771
Author(s):  
Lee ◽  
Kim ◽  
Moon ◽  
Lim ◽  
Cho
Keyword(s):  
Heat Flux ◽  
High Temperature ◽  
Fusion Reactor ◽  
Nuclear Fusion ◽  
High Heat ◽  
Thermal Design ◽  
Design Criteria ◽  
Fusion Reactors ◽  
High Heat Flux ◽  
Nuclear Fusion Reactor

Nuclear fusion energy is a solution to the substitution of fossil fuels and the global energy deficit. However, among the several problems encountered for realizing a nuclear fusion reactor, the divertor presents difficulties due to the tremendous heat flux (~10 MW/m2) from high-temperature plasma. Also, neutrons produce additional heat (~17.5 MW/m3) from collisions with the materials’ atoms. This may lead to unexpected effects such as thermal failure. Thus, a comprehensive investigation on the divertor module is needed to determine the heat-absorbing capacity of the divertor module so to maintain the effect of incident heat flux. In this study, using an analytical approach and a simulation, the quantitative effect of heat generation on the thermophysical behavior, such as temperature and thermal stress, was analyzed while maintaining the incident heat flux. Then, a correlated equation was derived from the thermal design criteria, namely, the maximum thimble temperature and the safety factor at the vulnerable point. Finally, on the basis of the thermal design criteria, the heat-absorbing capacity of a nuclear fusion reactor in operating conditions was determined. This study contributes to the understanding of the divertor’s effects in nuclear fusion reactors for high-heat-flux and high-temperature applications.

Supporting the giant 23,000 tonne ITER Tokamak nuclear fusion reactor

2021 ◽  
Author(s):  
Fernando Rueda ◽  
Didier Combescure ◽  
David Alonso ◽  
Luis Maqueda ◽  
Carlos Meléndez ◽  
...  
Keyword(s):  
Fusion Reactor ◽  
Nuclear Fusion ◽  
Nuclear Fusion Reactor

Fast interplanetary propulsion using a spherical torus nuclear fusion reactor propulsion system

1999 ◽  
Author(s):  
Craig Williams ◽  
Stanley Borowski ◽  
Leonard Dudzinski ◽  
Albert Juhasz
Keyword(s):  
Fusion Reactor ◽  
Nuclear Fusion ◽  
Propulsion System ◽  
Spherical Torus ◽  
Nuclear Fusion Reactor

scholarly journals Steady-State Approach to Low-Aspect-Ratio Reversed-Field Pinch Nuclear Fusion Reactor

2005 ◽  
Vol 81 (11) ◽  
pp. 932-943 ◽  
Author(s):  
Shoichi SHIINA ◽  
Yasuyuki YAGI ◽  
Hisaya SUGIMOTO ◽  
Hisao ASHIDA ◽  
Yoichi HIRANO ◽  
...  
Keyword(s):  
Steady State ◽  
Aspect Ratio ◽  
Fusion Reactor ◽  
Nuclear Fusion ◽  
Reversed Field Pinch ◽  
Nuclear Fusion Reactor ◽  
Low Aspect Ratio ◽  
Reversed Field
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