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W7-X Divertor Development - P224

P224 - W7-X Divertor Development

The project’s mission is to establish a performance-oriented, data-driven decision basis for a reactor-relevant W7-X divertor, building on existing scientific knowledge and available modeling tools. Following two roadmaps towards a carbon-free W7-X, the TWG “W7-X Strategy 2030” final report separated the divertor development into 1a – Definition of divertor geometry and 1b – Technology development and qualification, with 1a concluding in an IPP report and 1b with a Concept Design Review (CDR). Both strands will be combined into an integrated design, finalized by a Developed Design Review (DDR). The CDR for 1b is planned for the first half of 2026, and the IPP report for 1a in the second half of 2026.

Work in 1a will focus on:

1. Optimizing the workflow for systematic quantification of divertor functions.

2. Evaluating distinct divertor geometries in three phases:

    • Phase 1: Design for individual W7-X vacuum magnetic configurations (5/4, 5/5, 5/6).
    • Phase 2: Assessment of performance losses with plasma scenarios, extending coverage to <β> = 2.5% and <β> = 5%, including determination of the Itor operational space.
    • Phase 3: Quantification of performance trade-offs for divertor solutions covering multiple magnetic configurations.

Work in 1b will focus on:

1. Design and qualification of a metal target technology for reactor-relevant operation.

    • Target designed for maximum steady state heat flux
    • Material with high sputtering threshold and low tritium retention
    • Simplify manufacturing, inspection, and assembly
    • Experimental qualification

📌 Project Team Meeting Time

Default: Tuesday 10:00–11:30 in SR2
Zoom Link
Indico Event Page
Meeting calender, agenda, presentations, and minutes available on Indico. Instructions on how to synchronize your own calender with it, is on Indico under materials on the right side.

📌 Single Source of Truth

📁 Project Folder for documents and files:

Windows - Copy into file explorer
\\share\mp\P224-W7-X_Divertorentwicklung
Linux - IT ticket to mount the drive
Access remotely through the Cloudstorage

💻 GIT for code:

https://gitlab.mpcdf.mpg.de/grma/P224_W7-X_Divertor_Development

🔧 CATIA-SmarTeam:

"0010 - W7-X Anlagen" - "A224 - Metalldivertor - ACW"

📊 IPP Integrated Document Management (IDM):

https://idm.ipp-hgw.mpg.de/?uid=2KGA54

📌 WBS:

4-E5-Dev-DT_A224_P224_ACW_W7-X_Divertorentwicklung

🔗 Original EMC3Lite GIT (access rights required):

https://gitlab.mpcdf.mpg.de/ygao/emc3_lite_universal

Access rights need to be requested from Yuhe Feng, Thierry can help.

📌 Milestones (2026)

  • CDR (1b): 1st half of 2026
  • IPP Report (1a): 2nd half of 2026
  • DDR (Developed Design Review): After CDR & report (planned: 2027)

© 2025 Max-Planck-Institut für Plasmaphysik – Project P224

Updated: 02.02.2026

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