What is it about?

This innovative technology can play a pivotal role in addressing one of the United Nations Sustainable Development Goals: "Ensure access to affordable, reliable, sustainable, and modern energy for all." However, one of the significant challenges in realizing the fusion reactor is the need to develop effective methods for monitoring and controlling energetic particles produced by fusion reactions or external heating sources.

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Why is it important?

We have developed instruments that can observe changes in the real-space or velocity-space of energetic ions roughly 100 times faster than traditional methods. These measurement tools were put to use at the Large Helical Device (LHD, see Figure), one of the largest helical fusion experimental machines. Through their use, we've achieved remarkable insights related to intermittent burst events: 1) a deeper understanding of the behavior of energetic particles confined at the core, and 2) the identification of enhancement of prompt loss of energetic particles.


We hope this article reaches individuals with a shared aspiration for a sustainable society and those who hold concerns regarding energy matters, offering them the chance to delve into their curiosity about fusion power generation. And with the support of many people, I hope that fusion power generation, the ultimate energy source, will be realized as soon as possible.

Yuichi Kawachi
Kyoto Institute for Technology

Read the Original

This page is a summary of: Fast-sampling fast-ion D-alpha measurement using multi-anode photomultiplier tube in large helical device, Review of Scientific Instruments, October 2023, American Institute of Physics,
DOI: 10.1063/5.0159175.
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