Patent ID: 11972938
Assignee: THERMO FISHER SCIENTIFIC (BREMEN) GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A voltage supply for a mass analyser comprising
a voltage source;
a first voltage output configured to provide a first voltage to a first electrode of the mass analyser, the first electrode of the mass analyser having a first mass shift per volt perturbation;
a second voltage output configured to provide a second voltage to a second electrode of the mass analyser, the second electrode of the mass analyser having a second mass shift per volt perturbation,
wherein the second mass shift per volt perturbation opposes the first mass shift per volt perturbation; and
a voltage divider network connected to the first voltage output, the second voltage output and the voltage source, the voltage divider network comprising:
a first resistor configured to define the first voltage, the first resistor having a first ageing coefficient; and
a second resistor configured to define the second voltage, the second resistor having a second ageing coefficient, wherein the second ageing coefficient is selected based on the first and second mass shift per volt perturbations and the first ageing coefficient such that a first mass shift associated with the first electrode is compensated by a second mass shift associated with the second electrode.