Image:Gadget-schematic-crosssection.png

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Gadget-schematic-crosssection.png‎ (11KB, MIME type: image/png)

Schematic cross-section of the first atomic bomb, which was tested at the Trinity site in the framework of the Manhattan Project, and was nicknamed the gadget

  • made from Nuclear Weapon Archive's description
  • about 630 pixels/metre
  • thickness of casing not given (It may not have been very thick. If I understand high explosive--which I don't claim to do--a casing rupture would not have mattered after a few microseconds. And notice, for instance, that half the bolts may have been left out of Gadget's one flange.[1])
  • the lens based on 78:47 detonation-speed ratio ([2] pg6) and 10 cm between EBW and Baratol
  • thickness of amplifier layer not given

[edit] Caption

Layers go from left-to-right:

  • ██ dural casing, ~140 cm inner diameter
  • ██ exploding-bridgewire detonator (allows for instantaneous detonation of explosives)
  • ██ faster explosive, Composition B: 60% RDX, 39% TNT, 1% wax
  • ██ slower explosive (Baratol)
  • ██ faster explosive, "amplifier"
  • ██ aluminum–boron "pusher" (absorbs stray neutrons and widens/smooths implosion pulse)
  • ██ natural-uranium "tamper" (neutron reflector, inertial containment, improves efficiency, reduces the amount of fission material needed)
  • ██ the "pit"; plutonium-239–plutonium-240–gallium delta-phase alloy (96%–1%–3% by molarity)(fissionable material); sphere with a diameter of 9 cm, with a 2.5 cm cavity and a plutonium plug to allow initiator insertion; mass 6.2 kg
  • ██ air gap
  • ██ beryllium–polonium-210 "initiator" (the "urchin"), neutron source

[edit] License

This image was created by User:Kwantus.

GFDL

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
Subject to disclaimers.

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