END CAP REFLECTRON FOR TIME-OF-FLIGHT MASS SPECTROMETER

摘要

A reflectron (100) for use with a mass spectrometer that focuses ions having different energies contains a conductive end cap (106) that is electrically connected to a first voltage V0. A conductive surface (102, 104) is electrically isolated from the end cap and connected to a second voltage. This conductive surface cooperates with the conductive end cap to establish an inner region (108) in which a non-linear electric field exists. As a result, ions having different energies enter and exit the inner region at a common opening (110) and, when within the inner region, are reflected without penetrating past the conductive surface.