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UKAEA-CCFE-PR(26)4252025
A new low energy ion source was developed. ExTEnD (Exposure to Low Energy Deuterium) uses an electrical discharge to create a plasma from which ions can be extracted via a biased sample stage – offering a simple and accessible setup to perform low energy ion exposure for hydrogen retention studies. Careful selection of operating conditions allowe…
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UKAEA-CCFE-CP(26)352025
Diagnostics are critical on the path to commercial fusion machines, since the ability to understand and measure plasma features is important to sustaining fusion reactions. Gamma spectroscopy is a technique in experimental nuclear physics that can be used to aid fusion diagnostics, including providing information in neutron activation analyses to c…
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UKAEA-CCFE-PR(25)3092025
Neutral Beam Injection (NBI) is a powerful and very commonly used tool on machines used in the development of magnetically confined fusion power. Not all the neutral beam power is deposited within the plasma. This shinethrough power must be dealt with in the plasma vessel and any components irradiated by it must be protected against excessive he…
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UKAEA-CCFE-PR(25)2652025
The development of discrete strain at the microstructural scale during the onset of plasticity is potentially linked to fatigue crack nucleation in engineering alloys. Hence, quantifying such discrete strain and its evolution is a pathway to understand the microstructural influence on fatigue crack nucleation and to develop crack initiation mode…
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UKAEA-CCFE-PR(25)3172024
Polymers offer a number of properties of interest in robotics design, from the well established such as low weight, electrical and thermal insulation, to the more novel, where their visco-elasticity is of great benefit in designing vine robots and flexible sensors. The more dangerous the environment, for example in cases where high radiation is pre…
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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)3902023
Diagnostics are critical on the path to commercial fusion reactors, since measurements and characterisation of the plasma is important for sustaining fusion reactions. Gamma spectroscopy is commonly used to provide information about the neutron energy spectrum from activation analysis, which can be used to calculate the neutron flux and fusion powe…
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UKAEA-CCFE-CP(25)112023
Retention of tritium in structural materials of a fusion reactor is a concern for tritium accountancy, maintenance, and decommissioning. Plasma facing materials will be exposed to high temperatures, neutron damage and hydrogen isotopes. The damage caused by these conditions is a large area of exploration for fusion, with many questions still to…
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UKAEA-CCFE-PR(23)1482023
Silicon carbide fibre–reinforced silicon carbide matrix (SiCf/SiC) composites are desirable in structural nuclear applications due to their low density, high temperature strength and tolerance to energetic radiation. We have subjected two industrial grades of SiCf/SiC to high energy He²⁺ ion irradiation, up to 10,000 a…
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UKAEA-CCFE-PR(23)1242023
Beryllium samples from the JET ITER-like wall limiter tiles with either co-deposits or surface cracks caused by melt damage, were immersed into boiling water for 4 h 15 min to simulate and assess the impact of coolant water ingress into a tokamak on the state of Be components. Microscopy of the water-treated surfaces and the residue in the water re…
Showing 1 - 10 of 41 UKAEA Paper Results