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UKAEA-CCFE-PR(24)2112024
REBCO coated conductor tapes are a highly attractive option for magnet materials in future tokamak fusion power plants. However, the threat of intense neutron and gamma radiation, plus AC loss power dissipation during magnet coil ramping, raises concerns around REBCO magnet coil lifetimes. Irradiation-induced flux creep, or AC loss, has been ide…
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UKAEA-CCFE-PR(26)4442023
Abnormal (deviating from target) variations in the plasma current Ip and vertical position Z constitute common cross-shot/device elements of a disruption, a phenomenon that is to be avoided (or ultimately mitigated) in future reactor-relevant tokamaks. Those abnormalities constitute important instances within disruptive chain of events (e.g. spi…
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UKAEA-CCFE-CP(26)422023
Spherical tokamaks show great potential in being the basis for a compact fusion power plant. With a reduced aspect ratio and the benefit of increased plasma performance, spherical tokamaks provide a pathway for tokamak electricity production with reduced capital costs compared to conventional aspect ratio tokamak power plant designs. The…
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UKAEA-CCFE-CP(26)412023
In 2021 JET exploited its unique capabilities to operate with T and D–T fuel with an ITER-like Be/W wall (JET-ILW). This second major JET D–T campaign (DTE2), after DTE1 in 1997, represented the culmination of a series of JET enhancements—new fusion diagnostics, new T injection capabilities, refurbishment of the T plant, increased auxiliary h…
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UKAEA-CCFE-CP(26)382023
A pedestal density prediction model based on combining the transport in the pedestal to an ionization model is used to predict the density profile of tokamak H-mode pedestals. The transport model combines stiff ETG turbulence, KBM turbulence based on critical pressure gradient and a small neoclassical transport. The ionization aspect of the mode…
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UKAEA-CCFE-PR(25)3912023
Accurate computation of power deposition is expected to be critical for the successful design of plasma facing components (PFCs) in reactor-scale magnetic confinement devices. The work provides analysis and model computations to help explain the high levels of accuracy obtainable using relatively coarse meshing of PFCs to treat cases with shar…
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UKAEA-CCFE-CP(25)272023
Fusion power is a critical part of the future energy landscape yet is all too often depicted with the focus on the fusion reaction itself with little attention on supporting systems. In practice of course a real power plant will have the tokamak surrounded by a plethora of ancillaries: the fuel cycle, cooling systems, diagnostics, radiation managem…
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UKAEA-CCFE-CP(25)102023
Fusion power is a critical part of the future energy landscape yet is all too often depicted with the focus on the fusion reaction itself with little attention on supporting systems. In practice of course a real power plant will have the tokamak surrounded by a plethora of ancillaries: the fuel cycle, cooling systems, diagnostics, radiation mana…
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UKAEA-CCFE-PR(25)2922023
A new Doppler backscattering (DBS) system, consisting of Q-band and V-band, has been installed and achieved its first data on the MAST-U spherical tokamak. The Q-band and V-band have separate microwave source systems, but share the same optical front-end components. The Q-band and V-band sources simultaneously generate eight (34, 36, 38, 40, 42,…
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UKAEA-CCFE-PR(25)2872023
Fast-particle driven Alfvén Eigenmodes have been observed in low-collisionality discharges with off-axis neutral beam injection (NBI), electron cyclotron resonance heating (ECRH) and a reduced toroidal magnetic field. During NBI and ECRH, toroidicity induced Alfvén Eigenmodes (TAEs) appear in frequency bands close to 200 kHz and energetic-part…
Showing 41 - 50 of 530 UKAEA Paper Results