• Skip to main content
  • Skip to secondary navigation

David Pace, PhD, MBA

mostly fusion

  • CV
  • Research
  • Physics
  • Miscellany
  • Microblog
  • Connect
You are here: Home / Microblog / Tungsten Escaping a Closed Tokamak Divertor

Tungsten Escaping a Closed Tokamak Divertor

December 16, 2023 2 Comments

Materials engineering for fusion energy frequently matures along two paths simultaneously. High-heat flux facilities provide qualifications that the candidate material can survive the power it will receive, and tokamaks demonstrate the feasibility of that material in the fusion plasma environment.

In newly published work from S.H. Messer and colleagues, the fusion plasma exhaust in DIII-D was directed into the Small Angle Slot (SAS) divertor region. The narrow geometry of this wall shape is expected to help contain high-Z materials, such as the tungsten coated on the divertor tiles for this experiment. The research team observed how tungsten escapes this closed geometry as a function of the magnetic field parameters (which set particle drift directions).

The “holiday kaleidoscope” graphic is chosen not just for whimsy, but to highlight the broad coverage of a detector array that measures low energy x-rays emitted by the plasma. By measuring a specific energy range, this diagnostic system can determine the density of tungsten across the plasma interior. In the ideal plasma scenario, the tungsten protecting the divertor tiles will stay in the divertor and not escape to pollute the hot, fusing plasma core.

This work was led by the University of Tennessee, Knoxville, with co-authors from Fusion and Fission at ORNL, General Atomics, University of Toronto, UC San Diego, and Sandia National Laboratories.

S.H. Messer, et al., Nuclear Materials and Energy 38, 101566 (2024), https://doi.org/10.1016/j.nme.2023.101566

#fusionenergy #materialsengineering #tungsten

Share this:

  • Click to email a link to a friend (Opens in new window) Email
  • Click to share on Reddit (Opens in new window) Reddit
  • Click to share on Facebook (Opens in new window) Facebook
  • Click to share on X (Opens in new window) X
  • More
  • Click to share on Tumblr (Opens in new window) Tumblr
  • Click to share on Telegram (Opens in new window) Telegram
  • Click to share on WhatsApp (Opens in new window) WhatsApp
  • Click to share on Pinterest (Opens in new window) Pinterest
  • Click to share on Pocket (Opens in new window) Pocket
  • Click to share on LinkedIn (Opens in new window) LinkedIn
  • Click to print (Opens in new window) Print

Filed Under: Microblog, Research

Reader Interactions

Comments

  1. dcpace says

    December 17, 2023 at 08:23

    @odd totally, would love to see that! 🚀

    Reply
  2. odd says

    December 16, 2023 at 15:40

    @dcpace I didn’t understand almost anything you just wrote, but I’ll be excited to see a fusion reactor in a space ship.

    Reply

Leave a ReplyCancel reply

Copyright © 2025 · David Pace