An N-Jammer is a device which suppresses nuclear fission reactions by blocking the movement of free neutrons (nuclear fusion, which does not rely on neutron emission, would be unaffected by an N-Jammer). They have a vast effective range, allowing a small number of these devices to cover the entire planet Earth. As a result, all nuclear weapons and nuclear power plants are rendered useless on the surface. A side effect is their ability to disrupt radio waves as well, which restricts the range of radar and conventional communications. As a result, space warships are equipped with these devices as an electronic countermeasure.
The drilling device used to deliver the jammer is similar to an asteroid splitter used in CE 73.
After the nuclear attack on Junius Seven by the Earth Alliance, PLANT created the N-Jammers to prevent any side from using nuclear weapons again. The project was supervised by Supreme Council member Orson White. On February 22, CE 70, ZAFT used the N-Jammers for the first time during the battle for the space station Yggdrasil. On April 1 of the same year, ZAFT launched Operation Uroboros with the first phase being the scattering of countless N-Jammers across Earth's surface. Since Earth relied on nuclear fission as its primary power source, the nations on the planet were plunged into a severe energy crisis called the April Fool's Crisis as a result. During the winter of CE 70-71, at least hundreds of thousands of Naturals died on Earth because of lack of energy for heating, due directly to the presence of N-Jammers on Earth.
Since the N-Jammers prevented ZAFT from using nuclear technology as well, they searched for a way to cancel their effect. This resulted in the creation of the Neutron Jammer Canceller, a device which blocked the effects of the N-Jammers in a small area. Although ZAFT hoped to gain the upper hand against the Earth Alliance with this technology, it eventually fell into the EA's hand, resulting in the mass-use of nuclear weapons against PLANT. Despite both sides using nuclear weapons again, peace was eventually achieved.
After the war's end, the Treaty of Junius was signed between both sides, which, among other things, outlawed the use of N-Jammers in combat, either in a defensive role or as a weapon. Also the long and costly process of digging out all N-Jammers on Earth begun at this time.
- Its effects appear to be analogous to the Minovsky Effect in Universal Century.
- When the famous Super Robot Wars series decided to have the Cosmic Era collected into its game, some users pointed out that having N-Jammers will make other Nuclear powered units not able to move. However, since all other Gundam series units uses Nuclear fusion as their power source, this is not a problem.
|Cosmic Era technology|
Deuterion Beam Energy Transfer System | Lightwave Barrier | Mirage Colloid | Phase Shift armor | Positron Blaster Cannon | Positron Reflector
|Mobile Suit technology|
DRAGOON system | G Project | METEOR | Second Stage Series | Striker Packs | Voiture Lumiere
Cyclops System | GENESIS | Hyper-Deuterion Engine | Neutron Jammer | Neutron Jammer Canceller | Neutron Stampeder | Nibelung | Requiem
Carbon Human | Coordinators | Extended humans | Newtypes | SEED factor