| 摘要 |
<p>A multipole rod assembly, such as used as mass analyser, is fabricated using rods 322 adhesively attached to shoes 321, which are then attached to isolation rings 324. A fixture (Fig. 7, 700) is used in conjunction with precision-made spacers (Fig.8, 800) to precisely assemble the ion mass analyser. The rods 322 and shoes 321 can be made of metal, while the isolation rings 324 are preferably made of an insulator, such as ceramic. The shoes 321 and isolation rings 324 need not be made to high precision, as the spacer (Fig. 8, 800) ensures high accuracy in alignment and symmetry of the rods 322. Consequently, the rods 322 are the only precision machined parts in the ion mass analyser assembly.</p> |
