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This is important work. I would also recommend any of the Peter Kuran documentaries (Trinity and Beyond, Nukes in Space, Hollywood's Top Secret Film Studio). W
by matthewmcg 10y ago
This is important work. I would also recommend any of the Peter Kuran documentaries (Trinity and Beyond, Nukes in Space, Hollywood's Top Secret Film Studio).
What's really interesting about these is that there is a visible frame count on some of the videos and that you get to see a few frames before the detonation. E.g. the Androscoggin test opens on frame "-8" with the first flash visible at frame 0. You can see this by pausing the youtube videos and advancing frame by frame with the "." key.
There are a whole bunch of really interesting but rarely-seen effects that occur in those first one or two frames.
Here's an example from a different source of the "Teller Light" that immediately follows the initial release of gamma radiation from the initial nuclear fission in the bomb core: http://www.americancrisis.us/images/2013_08_30_013709_1_teller_light_2.jpg http://www.americancrisis.us/images/2013_08_30_013709_1_tell...
There's a neat description of this in a paper from 1958 here:
"The glow is known begin immediately (well within a shake) after gamma irradiation of the air, and has an apparent brightness of the order of that of the sun."
https://www.osti.gov/scitech/biblio/4814701 https://www.osti.gov/scitech/biblio/4814701
It would be really interesting to see the first few high speed frames of a detonating multi-stage weapon. Presumably this would reveal details about the sequence of energy flow from the exploding fission stage to the compressed fusion stages. Indeed, there were diagnostic pipes like this fitted to some of the early H-bomb test devices, e.g. http://nuclearweaponarchive.org/Usa/Tests/IvyMikeDevB1600c20.jpg http://nuclearweaponarchive.org/Usa/Tests/IvyMikeDevB1600c20...
Sadly, all of the multi-stage tests I have seen in public sources begin a few frames after detonation, or, like these, they are shot from far enough away that you just see a single diffuse glow.
- JoeDaDude 10y agoI second the recommendation. Peter Kuran, a film maker, was responsible for restoring a lot of atom bomb test footage that was rotting away and making the restored versions publically available. [1] http://www.atomcentral.com/about-Peter-Kuran.aspx http://www.atomcentral.com/about-Peter-Kuran.aspx