It was a 960-ton iron tracking calorimeter whose primary purpose was to search for proton decay, although its data was also used to investigate the properties of neutrinos.
ɪt wʌzɐ nˈaɪnhˈʌndɹɪd sˈɪkstitˈʌn ˈaɪɚn tɹˈækɪŋ kˌæloːɹˈɪmᵻɾɚ hˌuːz pɹˈaɪmɚɹi pˈɜːpəs wʌz tə sˈɜːtʃ fɔːɹ pɹˈoʊtɑːn dᵻkˈeɪ, ɔːlðˈoʊ ɪts dˈeɪɾə wʌz ˈɔːlsoʊ jˈuːzd tʊ ɪnvˈɛstᵻɡˌeɪt ðə pɹˈɑːpɚɾiz ʌv nuːtɹˈiːnoʊz.