FIELD: electricity.
SUBSTANCE: ion current recording unit in mass-spectrometric leak detector is intended for operation as a component of helium leak detectors. The unit contains in vacuumised space an ion target (1) and an amplifier (2), from output of the latter an analogue signal comes to an analogue-to-digital converter (3) installed in the same space. The received digital signal comes to further processing outside the vacuumised space through a connector (4).
EFFECT: sharp increase in ion current measuring sensitivity due to ion current separation from leak currents at the output connector.
1 dwg
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