The N² Technology ("N²" being short for Non-Nuclear) is a technology seen throughout various Evangelion series in different forms.
N² weapons (N² 兵器, N² heiki) is the name given to the strongest conventional (non-Evangelion) weapons ever created by mankind. N² weapons are as strong as nuclear bombs, even being capable of producing electro-magnetic pulses, but they lack the radioactive fallout generated by their nuclear counterparts, allowing them to be used more readily than their predecessors. The name N², meaning 'Non-nuclear' refers to this. They are capable of dealing moderate damage to some of the weaker Angels, as can be seen during Sachiel's attack to Tokyo-3, although even several detonations of N² weapons are incapable of affecting others. It has been said that the N² weapons are broadly similar to a low-yield nuclear warhead, with no apparent fallout comparable to FOABs and other real life Thermobaric weapons.
N² weapons come in five basic forms.
- N² bomb (N²爆弾, bakudan)
- N² depth charge (N²爆雷, N² bakurai)
- N² land mine (N²地雷, N² jirai)
- N² aerial weapon (N²航空兵器, N² koukuu heiki)
- N² missile
N² Reactor is a technology appearing in Neon Genesis EVANGELION (3 Years After) -ANIMA-. It is used on the UX-1 Allegorica support unit and Evangelion EUROII Heurtebize. Its purpose is essentially the same as the S² Engine's one as it grants the Eva unit an unlimited amount of operational time. However, it uses N²-derived technologies to achieve this.
- Although "N²" is always written with a superscript "2", it is not pronounced "N-squared", but simply "N-two".