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AOS (Baffles & Beam dumps)
tomotada.akutsu - 3:12 Friday 20 April 2018 (4758) Print this report
WAB heating test

See here for the detail.

This morning (on 2018 Apr 19), the temperature rising of the WAB dummy seemed not stop by the heat inputting since the last evening. Even in noon the rising rate seemed not changing; eventually it was approaching 66K. Actually, I derived the derivative coefficient (K/hours) by simply taking difference/difference of the measured data, and  found the derivative was asymptotically approaching a non-zero value: about 0.35K/hours as shown around 35-38 hours in Fig 2. Although it would become zero in the future, I can estimate this won't happen today.

So, I gave up waiting the equilibrium, and reduced the input power to be about 1.3W to the WAB dummy at 16:30 today JST, which is shown as a vertex point at 38-39 hours in Fig 1. Since then, the temperature has been getting down; let's see.

  • Note1: in the attached figs, the horizontal axis shows just relative hours.
  • Note2: Fig 3 is a wider version of Fig 2.
  • Note3: Data in the last evening (shown in the attached Fig there) is also included in Fig 1 here.
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