Matthew F Appel

US Patent:

20030230726, Dec 18, 2003

Filed:

Feb 13, 2003

Appl. No.:

10/365800

Inventors:

Wytze Van der Veer - Irvine CA, US
Matthew Appel - Irvine CA, US
Thorsten Benter - Wuppertal, DE

International Classification:

H01J037/147
H01J049/40

US Classification:

250/39600R, 250/287000

Abstract:

A technique employing volume conductive electrodes for the generation of linear or non-linear electric fields is provided for devices used in charged ion optics. A hollow cylinder of a conductive polymer, which is loaded with conductive carbon particles or inherently conductive, and which is used to improve the performance of a dual stage gridless reflectron. Instrumental resolution measurements comparing a conventional discrete ring reflectron with a hybrid polymeric/discrete ring validate the design.