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Progress Report

Huang Yen-Jui

Fusion Materials Lab�National Taiwan University of Science and Technology

Date: 1 Sept., 2025

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Progress Report

Huang Yen-Jui,

Fusion Materials Lab

National Taiwan University of Science and Technology

Date: 1 Sept., 2025

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Outline

Backgrounds

DEMO fusion reactors, divertor’s cooling system
R-HEA thin films
Recent progresses
Research objectives

Experimental design

Material preparation
Analysis method (SEM, nanoindentation..)

Results

Morphology, cross-sectional view
Micro hardness
…… etc.

Discussion

Comparison and findings

Conclusion

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Contents

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Backgrounds: DEMO divertor’s cooling system

DEMO’s divertor plays critical role in sustaining plasma shape and purity. Extreme environments require a robust cooling system. Proposal design includes RAFM & Cu alloy (CuCrZr) piping system.

JA-DEMO design [1]

[1] K. Tobita Fusion Sci. Technol., 72:4, 537-545, 2017 [2] N. Asakura 2017 Nucl. Fusion 57 126050

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Design of divertor and its cooling piping [2]

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Results: SEM observation

SEM observation of morphology:

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Condition2:

Condition3:

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Summary

Basing on previous efforts, we found that:

Results show that …. is as expected
The performance ….. is outstanding

→If not good…

Future works

→ Try other testing parameters .

→ Why you believe it works.

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