THE OXFORD ELECTRON-BEAM ION-TRAP - A DEVICE FOR SPECTROSCOPY OF HIGHLY-CHARGED IONS - SILVER,JD; VARNEY,AJ; MARGOLIS,HS; BAIRD,PEG; GRANT,IP; GROVES,PD; HALLETT,WA; HANDFORD,AT; HIRST,PJ; HOLMES,AR; HOWIE,DJH; HUNT,RA; et al. (AMER INST PHYSICS, 1994)