Patent ID: 8674298
Filing Date: 2014-03-18
Classification: H01J

Abstract:
1. A quadrupole mass spectrometer capable of analyzing gas components in a test piece, the quadrupole mass spectrometer comprising a sensor section adapted to be detachably fitted to the test piece, wherein, supposing that a direction of fitting the sensor section to the test piece is in an upward direction, the sensor section comprises in the following order: a predetermined shape of supporting body with connecting terminals that are vertically provided on the supporting body, both the supporting body and the connecting terminals being provided at a lower end of the sensor section; an ion source provided on the supporting body and having a filament and a grid for ionizing the gas; a quadrupole section provided on the ion source and having four columnar electrodes disposed at a predetermined circumferential distance from one another; and an ion detection section provided on the quadrupole section in order to collect predetermined ions that pass through the quadrupole section by applying DC and AC voltages between opposite electrodes, wherein both of free ends of the filament and the grid are directly connected to the connecting terminals.