▁the ▁basis ▁of ▁the ▁momentum ▁and ▁direction ▁of ▁the ▁produced ▁charged ▁le pton . ▁The ▁higher ▁neut r ino ▁energ ies ▁are ▁suppress ed ▁by ▁the ▁off - axis ▁configuration , ▁decre asing ▁the ▁number ▁of ▁interactions ▁with ▁mes on ▁production , ▁which ▁are ▁background ▁in ▁the ▁oscill ation ▁analysis ▁in ▁the ▁T 2 K ▁experiment . ▁ ▁Near ▁detect ors ▁ ▁The ▁near ▁det ector ▁complex ▁is ▁located ▁at ▁a ▁distance ▁of ▁ 2 8 0 ▁meters ▁from ▁the ▁graph ite ▁target . ▁Its ▁purpose ▁is ▁to ▁measure ▁the ▁neut r ino ▁flux ▁before ▁oscill ations ▁and ▁to ▁study ▁neut r ino ▁interactions . ▁The ▁system ▁consists ▁of ▁three ▁main ▁detect ors : ▁ ▁IN GR ID ▁det ector ▁( Inter active ▁Ne ut r ino ▁GR ID ) ▁located ▁on ▁the ▁axis ▁of ▁the ▁neut r ino ▁beam , ▁ ▁N D 2 8 0 ▁det ector ▁located ▁ 2 . 5 ° ▁away ▁from ▁the ▁beam ▁axis , ▁i . e . ▁at ▁the ▁same ▁angle ▁as ▁the ▁far ▁det ector . ▁ ▁W agas ci - B aby MIN D ▁( WA ter ▁Grid ▁SC Int ill ator ▁Det ector ▁- ▁prototype ▁Mag net ized ▁Iron ▁Ne ut r ino ▁Det ector ) ▁is ▁a ▁magnet ised ▁neut r ino ▁det ector ▁located ▁at ▁ 1 . 5 ° ▁off - axis ▁angle , ▁built ▁to ▁explore ▁the ▁energy ▁spectrum ▁variation ▁with ▁the ▁off - axis ▁angle ▁and ▁cross - sections ▁at ▁higher ▁average ▁neut r ino ▁energy .