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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 why 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 wikiPageRevisionID "597142779".
- Insertion_time hasPhotoCollection Insertion_time.
- Insertion_time subject Category:Nuclear_physics.
- Insertion_time subject Category:Nuclear_technology.
- Insertion_time subject Category:Nuclear_weapons.
- Insertion_time type Artifact100021939.
- Insertion_time type Device103183080.
- Insertion_time type Instrument103574816.
- Insertion_time type Instrumentality103575240.
- Insertion_time type NuclearWeapon103834604.
- Insertion_time type NuclearWeapons.
- Insertion_time type Object100002684.
- Insertion_time type PhysicalEntity100001930.
- Insertion_time type Weapon104565375.
- Insertion_time type WeaponOfMassDestruction104565963.
- Insertion_time type Whole100003553.
- 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 m.025v510.
- Insertion_time sameAs Q6037400.
- Insertion_time sameAs Q6037400.
- Insertion_time sameAs Insertion_time.
- Insertion_time wasDerivedFrom Insertion_time?oldid=597142779.
- Insertion_time isPrimaryTopicOf Insertion_time.