5-9 September 2016
Prague Congress Centre
Europe/Prague timezone
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Contribution Poster

Prague Congress Centre - Foyer 2A (2nd floor), 3A (3rd floor)
F. Plasma Facing Components

P4.119 Virtual prototyping tools for the JET divertor

Speakers

  • Daniel IGLESIAS

Co-authors

  • Daniel IGLESIAS (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Patrick BUNTING (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Sergio ESQUEMBRI (UPM-I2A2, Technical University of Madrid, 28031 Madrid, Spain)
  • Jonathan HOLLOCOMBE (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Scott SILBURN (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Daniel VALCARCEL (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Itziar BALBOA (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Alexander HUBER (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Guy MATTHEWS (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Valeria RICCARDO (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)
  • Fernanda RIMINI (UKAEA-CCFE, Culham Science Centre, OX14 3DB Abingdon, United Kingdom)

Content

Virtual prototyping enhances traditional engineering analysis workflow when a quick evaluation of complex load cases is required. During design, commissioning or operating phases, components can be virtually tested in realistic conditions by using previously validated numerical models and experimental databases. Three complementary applications have been developed under this approach for the JET divertor. Their aim is increasing its operational range, reliability, and understanding. At the same time, they are designed to be extensible to any plasma facing component.

ALICIA is a novel inverse code suitable for use with complex geometries and noisy input temperature signals (1D IR maps). It calculates power profiles—including ELMs—with unprecedented accuracy, defining a realistic input for the recreation of the plasma load for each pulse. This reliable data is extremely important for the development, validation and application of the other two forward codes.

VITA simulates the temperature evolution of divertor tiles using experimental conditions stored in the JET database. It can produce synthetic tile surface temperatures—accurate with respect to measurements—, which could play a critical role for operating the tokamak if divertor IR measurements were not available. It can also be used during the preparation phase to check more accurately (hence with a reduced margin) a planned pulse will remain within the temperature limits.

WHAM is the first nonlinear thermal finite element solver designed to work in a tokamak real time machine protection system. It is included as a module for the Wall Load Limitation System (WALLS), simulating the transient 2D thermal response of plasma facing components to produce synthetic tile surface temperatures within a strict cycle time limit of 8 ms.

This communication summarizes the motivation, requirements, design, and important advances to the operational and experimental understanding provided by these new tools.