The mass spectrometer 32, in which the storage device further comprises an end cap defining therein a storage device exit, the axial distance between the end cap and {TAIL ~ a point mid way} along {HEAD ~ the end pole segments} being no less than the said inscribed diameter 
The mass spectrometer 32 , in which the storage device further comprises an end cap defining therein a storage device exit , the axial distance between the end cap and { TAIL ~ a point mid way } along { HEAD ~ the end pole segments } being no less than the said inscribed diameter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH