Detector using microchannel plates and mass spectrometer

Details Detector using microchannel plates and mass spectrometer Detector using microchannel plates and mass spectrometer

2006-05-23

2006-05-23

Lee, John R. (Department: 2881)

Radiant energy

With charged particle beam deflection or focussing

With detector

C250S305000, C250S310000, C313S1030CM, C313S1050CM

Reexamination Certificate

active

07049605

ABSTRACT:
A mass spectrometer detector having a coupling capacitor including an anode that is placed at a high potential of say −4.9 kV. An annular electrode is placed outside the anode. A voltage of say −5 kV is applied to the annular electrode. This reduces the potential difference between the anode and the annular electrode, mitigating the electric field. A peripheral electrode is mounted on the outer fringe of a dielectric body and stably held at a potential of say −2.5 kV, for example, by voltage-dividing resistors.

REFERENCES:
patent: 4868394 (1989-09-01), Fukuhara et al.
patent: 2001-273867 (2001-10-01), None

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