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