JET experiments with tritium and deuterium–tritium mixtures

L. Horton, A.J.H. Donné

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Extensive preparations are now underway for an experiment in the Joint European Torus (JET) using tri-tium and deuterium–tritium mixtures. The goals of this experiment are described as well as the progressthat has been made in developing plasma operational scenarios and physics reference pulses for usein deuterium–tritium and full tritium plasmas. At present, the high performance plasmas to be testedwith tritium are based on either a conventional ELMy H-mode at high plasma current and magnetic field(operation at up to 4 MA and 4 T is being prepared) or the so-called improved H-mode or hybrid regimeof operation in which high normalised plasma pressure at somewhat reduced plasma current results inenhanced energy confinement. Both of these regimes are being re-developed in conjunction with JET’sITER-like Wall (ILW) of beryllium and tungsten. The influence of the ILW on plasma operation and perfor-mance has been substantial. Considerable progress has been made on optimising performance with theall-metal wall. Indeed, operation at the (normalised) ITER reference confinement and pressure has beenre-established in JET albeit not yet at high current. In parallel with the physics development, extensivetechnical preparations are being made to operate JET with tritium. The state and scope of these prepara-tions is reviewed, including the work being done on the safety case for DT operation and on upgradingmachine infrastructure and diagnostics. A specific example of the latter is the planned calibration at14 MeV of JET neutron diagnostics.
Original languageEnglish
Pages (from-to)925-936
Number of pages12
JournalFusion Engineering and Design
Publication statusPublished - 24 Feb 2016
Event12th International Symposium on Fusion Nuclear Technology, 14-19 September 2015, Jeju Island, Republic of Korea - Jeju Island, Korea, Republic of
Duration: 14 Sep 201518 Sep 2015


  • Deuterium
  • Fusion performance
  • JET
  • Plasma-wall interactions
  • Tritium


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