Dr Coad retires this week after 27 years at JET studying the interactions between the plasma and the vessel wall tiles such as the two pictured above. The darker tile in the picture is made of carbon, the original tile material in JET. As a result of the work Dr Coad has been involved in throughout his career, the carbon has now been replaced with the ITER-Like Wall, made from tiles made of beryllium and tungsten.
“It’s been a great place to work” he says. “The nature of the experiment is exciting, and the ITER-Like Wall gives it an extra level of interest”. Dr Coad’s area of study has been the erosion of the wall by the hot plasma. These wall materials contaminate the plasma and can combine with the fuel, preventing it from being pumped out of the vessel. Instead the contaminated fuel deposits as layers on the wall tiles or as loose flakes of dust in the vessel.
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