Stray radiation energy fluxes in ITER based on a multiresonator model

D. Moseev*, J. W. Oosterbeek, A. Sirinelli, Y. Corre, M. Houry, S. B. Korsholm, H. P. Laqua, S. Marsen, M. Preynas, J. Rasmussen, M. Salewski, T. Stange, V. Udintsev

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Here we re-evaluate the stray radiation loads due to electron cyclotron resonance heating and diagnostic gyrotrons in ITER, as well as compute the stray radiation energy flux due to electron cyclotron emission. Microwave loads due to stray radiation were assessed in the past. We give here more comprehensive estimates, including spatial variations in the machine. We show that for the start-up phase in the First Plasma campaign the threshold of 100 kW/m2, which diagnostics have to be able to withstand, is not exceeded. For the later campaigns, the stray radiation energy flux during start-up and burnthrough will exceed 450 kW/m2. Stray radiation from electron cyclotron emission and from a diagnostic 60 GHz gyrotron can contribute to more than 140 kW/m2 combined.

Original languageEnglish
Article number112754
JournalFusion Engineering and Design
Number of pages7
Publication statusPublished - 2021

Bibliographical note

Funding Information:
This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funding Information:
The work leading to this publication has been funded partially by Fusion for Energy under the Framework Partnership Agreement F4E-FPA-393. This publication reflects the views only of the author, and Fusion for Energy cannot be held responsible for any use which may be made of the information contained therein.


  • CTS
  • ECE
  • ECRH
  • Gyrotron
  • ITER
  • Stray radiation


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