▁is ▁water - based . ▁Cross ▁sections ▁on ▁carbon ▁and ▁on ▁the ▁water ▁can ▁be ▁determined ▁from ▁a ▁comparison ▁of ▁neut r ino ▁interactions ▁in ▁the ▁two ▁F G D s . ▁ ▁Elect romagnet ic ▁Cal or imeter ▁ ▁The ▁Elect romagnet ic ▁Cal or imeter ▁( EC AL ) ▁surr ounds ▁the ▁inner ▁detect ors ▁( P 0 D , ▁T PC s , ▁F G D s ) ▁and ▁consists ▁of ▁sc int ill ator ▁layers ▁sand wich ed ▁with ▁lead ▁absor ber ▁sheets . ▁Its ▁role ▁is ▁to ▁detect ▁neutral ▁particles , ▁especially ▁phot ons , ▁and ▁measure ▁their ▁energy ▁and ▁direction , ▁as ▁well ▁as ▁to ▁detect ▁charged ▁particles ▁providing ▁additional ▁information ▁relevant ▁for ▁their ▁identification . ▁ ▁Side ▁Mu on ▁Range ▁Det ector ▁ ▁The ▁Side ▁Mu on ▁Range ▁Det ector ▁( SM R D ) ▁consists ▁of ▁sc int ill ator ▁modules ▁which ▁are ▁inserted ▁into ▁the ▁g aps ▁in ▁the ▁magnet . ▁The ▁SM R D ▁records ▁mu ons ▁esc aping ▁the ▁inner ▁parts ▁of ▁the ▁det ector ▁at ▁large ▁angles ▁with ▁respect ▁to ▁the ▁beam ▁direction . ▁It ▁can ▁also ▁act ▁as ▁a ▁trigger ▁for ▁cos mic ▁ray s . ▁Finally , ▁it ▁can ▁help ▁identify ▁beam ▁interactions ▁in ▁the ▁surrounding ▁walls ▁and ▁in ▁the ▁magnet ▁itself . ▁ ▁W AG AS CI - B aby ▁M IND ▁W AG AS CI - B aby ▁M IND ▁is ▁a ▁new ▁det ector ▁located ▁next ▁to ▁the ▁IN GR ID ▁and ▁N D 2 8