i
RETERENCE
LiN£
ION-TRAP
GLASS MAGN£7
NECK SECTION /
8 A5E
CENTERiNG
MAGNET
ELECTRON
OEtLECTED
Electron beam
CONOUC TIVE CO AT ING
CR ID. NSI
GRID
N23
GRlO N2 2
GR-D N2 4
DEElECTiNG
YOKE
GLASS ENVELOPE