Ivy King: Difference between revisions

Ivy King
Ivy King
	Ivy King's mushroom cloud
Information
Country	United States
Test series	Operation Ivy
Test site	Enewetak
Date	November 16, 1952
Test type	Atmospheric
Yield	500 kt (2092 TJ)
Test chronology
	← Ivy Mike

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Revision as of 16:17, 10 September 2017

Video of Ivy King test

Ivy King was the largest pure-fission nuclear bomb ever tested by the United States.^[1] The bomb was tested during the Truman administration as part of Operation Ivy. This series of tests involved the development of very powerful nuclear weapons in response to the nuclear weapons program of the Soviet Union.

The production of Ivy King was hurried to be ready in case its sister project, Ivy Mike, failed in its attempt to achieve a thermonuclear reaction. The Ivy King test actually took place two weeks after Mike. Unlike the Mike bomb, the Ivy King device could theoretically have been added to United States' nuclear arsenal because it was designed to be air-deliverable.

On November 16, 1952 at 11:30 local time (23:30 GMT) a B-36H bomber dropped the bomb over a point 2,000 feet (610 m) north of Runit Island in the Enewetak atoll, resulting in a 500 kiloton explosion at 1,480 feet (450 m). The tropopause height at the time of the detonation was about 58,000 feet (18 km). The top of the King cloud reached about 74,000 feet (23 km) with the mushroom base at about 40,000 feet (12 km).^[2]

The Ivy King bomb, designated as a Mk-18 bomb and named the "Super Oralloy Bomb", was a modified version of the Mk-6D bomb. Instead of using an implosion system similar to the Mk-6D, it used a 92-point implosion system initially developed for the Mk-13. Its uranium-plutonium core was replaced by 60 kg of highly enriched uranium (HEU) fashioned into a thin-walled sphere equivalent to approximately four critical masses. The thin-walled sphere was a commonly used design, which ensured that the fissile material remained sub-critical until imploded. The HEU sphere was then enclosed in a natural-uranium neutron reflector. To physically prevent the HEU sphere collapsing into a critical condition if the surrounding explosives were detonated accidentally, or if the sphere was crushed following an aircraft accident, the hollow center was filled with a chain made from aluminum and boron, which was pulled out to arm the bomb. The boron-coated chain also absorbed the neutrons needed to drive the nuclear reaction.

The primary designer of the Super Oralloy Bomb, physicist Ted Taylor, later became a vocal proponent of nuclear disarmament.^{[citation needed]}

References

^ "Complete List of All U.S. Nuclear Weapons". The Nuclear Weapon Archive, A Guide to Nuclear Weapons. October 14, 2006. Retrieved September 10, 2017.
^ OPERATION IVY. Project 7.5. Dispersion of Gaseous Debris from Nuclear Explosions; Philip W. Allen, DEPARTMENT OF THE AIR FORCE WASHINGTON DC. Defense Technical Information Center, 1985.

Chuck Hansen (1988). U. S. Nuclear Weapons: The Secret History. Arlington: AeroFax.
Chuck Hansen (1995) Swords of Armageddon. Published on CD-Rom only by Chukelea, Sunnyvale, CA.

External links

Operation Ivy
Video of the Ivy King Nuclear Test

[nwa-bomb-list-1] "Complete List of All U.S. Nuclear Weapons". The Nuclear Weapon Archive, A Guide to Nuclear Weapons. October 14, 2006. Retrieved September 10, 2017.

[2] OPERATION IVY. Project 7.5. Dispersion of Gaseous Debris from Nuclear Explosions; Philip W. Allen, DEPARTMENT OF THE AIR FORCE WASHINGTON DC. Defense Technical Information Center, 1985.

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 [[File:Ivy King test.ogg|thumb|320px|Video of Ivy King test]]
-'''Ivy King''' was the largest pure-[[nuclear fission|fission]] [[nuclear weapon|nuclear bomb]] ever tested by the United States.<ref name=nwa-bomb-list>{{cite web |title=Complete List of All U.S. Nuclear Weapons |url=http://nuclearweaponarchive.org/Usa/Weapons/Allbombs.html#MK-18 |website=http://nuclearweaponarchive.org |accessdate=August 29, 2014 |date=October 14, 2006}}</ref> The bomb was tested during the [[Harry S. Truman|Truman]] administration as part of [[Operation Ivy]]. This series of tests involved the development of very powerful nuclear weapons in response to the nuclear weapons program of the [[Soviet Union]].
+'''Ivy King''' was the largest pure-[[nuclear fission|fission]] [[nuclear weapon|nuclear bomb]] ever tested by the United States.<ref name=nwa-bomb-list>{{cite web |title=Complete List of All U.S. Nuclear Weapons |url=http://nuclearweaponarchive.org/Usa/Weapons/Allbombs.html |website=The Nuclear Weapon Archive, A Guide to Nuclear Weapons |accessdate=September 10, 2017 |date=October 14, 2006}}</ref> The bomb was tested during the [[Harry S. Truman|Truman]] administration as part of [[Operation Ivy]]. This series of tests involved the development of very powerful nuclear weapons in response to the nuclear weapons program of the [[Soviet Union]].
 The production of Ivy King was hurried to be ready in case its sister project, [[Ivy Mike]], failed in its attempt to achieve a [[nuclear fusion|thermonuclear reaction]]. The Ivy King test actually took place two weeks after Mike. Unlike the Mike bomb, the Ivy King device could theoretically have been added to United States' nuclear arsenal because it was designed to be air-deliverable.