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Neutron Jammers (ニュートロンジャマー Nyūtoronjamā?) (also called N-Jammers) are devices used in the Cosmic Era timeline.

Technical Informations
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).