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- Insertion_time abstract "The term insertion time is used to describe the length of time which is required to rearrange a subcritical mass of fissile material into a prompt critical mass. This is one of the three main requirements in a nuclear weapon design to create a working fission atomic bomb. The need for a short insertion time with plutonium is the reason the implosion method was chosen for the first plutonium bomb, while with uranium-235 it is possible to use a gun design.The basic requirements are: To start with a subcritical system To create a super prompt critical system To make the change between these two states in a length of time (insertion time) which is shorter than the time between the random appearance of a neutron in the fissile material through spontaneous fission or by other random processes. Also at the right moment in time, neutrons must be injected into the fissile material to start up the fission process. This can be done by several methods. Alpha emitters such as polonium or plutonium-238 can be rapidly combined with beryllium to create a neutron source. Neutrons can be generated using an electrostatic discharge tube, this tube uses the D-T reaction.".
- Insertion_time wikiPageID "7174639".
- Insertion_time wikiPageLength "1424".
- Insertion_time wikiPageOutDegree "15".
- Insertion_time wikiPageRevisionID "686483893".
- Insertion_time wikiPageWikiLink Beryllium.
- Insertion_time wikiPageWikiLink Category:Nuclear_physics.
- Insertion_time wikiPageWikiLink Category:Nuclear_technology.
- Insertion_time wikiPageWikiLink Category:Nuclear_weapons.
- Insertion_time wikiPageWikiLink Critical_mass.
- Insertion_time wikiPageWikiLink Fissile_material.
- Insertion_time wikiPageWikiLink Neutron.
- Insertion_time wikiPageWikiLink Nuclear_weapon.
- Insertion_time wikiPageWikiLink Nuclear_weapon_design.
- Insertion_time wikiPageWikiLink Plutonium.
- Insertion_time wikiPageWikiLink Polonium.
- Insertion_time wikiPageWikiLink Prompt_criticality.
- Insertion_time wikiPageWikiLink Spontaneous_fission.
- Insertion_time wikiPageWikiLink Uranium.
- Insertion_time wikiPageWikiLinkText "Insertion time".
- Insertion_time wikiPageWikiLinkText "critical insertion time".
- Insertion_time wikiPageUsesTemplate Template:Reflist.
- Insertion_time wikiPageUsesTemplate Template:Unreferenced.
- Insertion_time subject Category:Nuclear_physics.
- Insertion_time subject Category:Nuclear_technology.
- Insertion_time subject Category:Nuclear_weapons.
- Insertion_time type Mechanic.
- Insertion_time type Physic.
- Insertion_time comment "The term insertion time is used to describe the length of time which is required to rearrange a subcritical mass of fissile material into a prompt critical mass. This is one of the three main requirements in a nuclear weapon design to create a working fission atomic bomb.".
- Insertion_time label "Insertion time".
- Insertion_time sameAs Q6037400.
- Insertion_time sameAs m.025v510.
- Insertion_time sameAs Q6037400.
- Insertion_time wasDerivedFrom Insertion_time?oldid=686483893.
- Insertion_time isPrimaryTopicOf Insertion_time.