▁horn ▁power ▁supply . ▁Meanwhile , ▁the ▁higher ▁pro ton ▁beam ▁power ▁dem ands ▁enh ancement ▁of ▁the ▁cool ing ▁capacity ▁of ▁the ▁secondary ▁beam line ▁components ▁such ▁as ▁the ▁graph ite ▁target , ▁the ▁magnetic ▁horn s ▁and ▁the ▁beam ▁dump , ▁as ▁well ▁as ▁dispos al ▁of ▁a ▁larger ▁amount ▁of ▁ir rad i ated ▁cool ing ▁water . ▁ ▁N D 2 8 0 ▁Up grade ▁ ▁The ▁current ▁design ▁of ▁the ▁N D 2 8 0 ▁det ector ▁is ▁optimized ▁for ▁the ▁detection ▁and ▁reconst ruction ▁of ▁forward - going ▁le pt ons ▁( mu ons ▁and ▁electrons ), ▁but ▁it ▁also ▁has ▁a ▁number ▁of ▁limitations , ▁like ▁low ▁reconst ruction ▁efficiency ▁of ▁particles ▁produced ▁almost ▁per pend icular ▁and ▁back ward ▁w . r . t . ▁the ▁direction ▁of ▁the ▁interact ing ▁neut r ino , ▁as ▁well ▁as ▁too ▁high ▁momentum ▁threshold ▁to ▁re construct ▁a ▁large ▁part ▁of ▁produced ▁p ions ▁and ▁knock ed - out ▁nucle ons ▁( pro tons ▁and ▁neut rons ). ▁In ▁Ch arg ed ▁Current ▁Qu asi - E last ic ▁( CC Q E ) ▁interactions , ▁the ▁domin ating ▁interaction ▁in ▁the ▁N D 2 8 0 ▁near ▁det ector , ▁kin emat ics ▁of ▁produced ▁le pton ▁is ▁enough ▁in ▁the ▁reconst ruction ▁of ▁the ▁incoming ▁neut r ino ▁energy . ▁However , ▁other ▁types ▁of ▁neut r ino ▁interactions ▁in ▁which ▁additional ▁particles ▁( p ions , ▁ka ons , ▁nucle ons ) ▁were ▁lost