ðeɪ ɑːɹ tˈɪpɪkli ɹˈʌfli sɪlˈɪndɹɪkəl, wɪð dˈɪfɹənt tˈaɪps ʌv dɪtˈɛktɚz ɹˈæpt ɚɹˈaʊnd ˈiːtʃ ˈʌðɚɹ ɪn kənsˈɛntɹɪk lˈeɪɚz; ˈiːtʃ dɪtˈɛktɚ tˈaɪp spˈɛʃəlˌaɪzᵻz ɪn pɚtˈɪkjʊlɚ pˈɑːɹɾɪkəlz sˌoʊ ðæt ˈɔːlmoʊst ˌɛni pˈɑːɹɾɪkəl wɪl biː dɪtˈɛktᵻd ænd aɪdˈɛntᵻfˌaɪd.
They are typically roughly cylindrical, with different types of detectors wrapped around each other in concentric layers; each detector type specializes in particular particles so that almost any particle will be detected and identified.