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30.08.2002 19:32:52
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Картинка не грузится, но...
...я нашел другую
с объяснением шипов:
http://nuketesting.enviroweb.org/hew/Usa/Tests/Hardtack2.html
"In the picture below, spikes can be seen propagating down the mooring cables of the balloon. These were termed "rope tricks" by Dr. John Malik, and are caused by thermal energy from the fireball surface vaporizing the cables. "
Вот еще на ту же тему:
http://nuketesting.enviroweb.org/hew/Usa/Tests/Tumblers.html
""Rope Tricks"
The image below shows the growing fireball, taken about one millisecond after detonation, for one of the Snapper tower shots (I haven't been able to find out which one yet). There are two striking features about this picture - the spikes projecting from the bottom of the fireball, and the ghostly mottling of the fireball surface.
The peculiar spikes are extensions of the fireball surface along ropes or cables that stretch from the shot cab (the housing for the test device at the top of the tower) to the ground. This novel phenomenon was named a "rope trick" by Dr. John Malik who investigated it. The effect had been observed in earlier tests when spikes were seen extending along cables that moored the shot towers to the ground. During Snapper Malik conducted experiments using different kinds of cables and ropes, and with different surface treatments. Consequently the spikes in this picture may be due to either mooring cables, or Malik's own test ropes.
The cause of the "rope trick" is the absorption of thermal radiation from the fireball by the rope. The fireball is still extremely hot (surface temperature around 20,000 degrees K at this point, some three and a half times hotter than the surface of the sun; at the center it may be more than ten times hotter) and radiates a tremendous amount of energy as visible light (intensity over 100 times greater than the sun) to which air is (surprise!) completely transparent. The rope is not
transparent however, and the section of rope extending from the fireball surface gets rapidly heated to very high temperatures. The luminous vaporized rope rapidly expands and forms a spike-shaped extension of the fireball. Malik observed that if the rope was painted black spike formation was enhanced, and if it was painted with reflective paint or wrapped in aluminum foil no spikes were observed."