High dynamic range mass spectrometer Patent #: 6864479
ApplicationNo. 11056530 filed on 02/11/2005
US Classes:250/283, With collection of ions250/287, With time-of-flight indicator250/286, Ion beam pulsing means with detector synchronizing means250/397, With detector250/309, Positive ion probe or microscope type250/394Plural signalling means
ExaminersPrimary: Lee, John D.
Assistant: Hashmi, Zia R.
Attorney, Agent or Firm
AbstractA mass spectrometer comprises an ion source which produces an ion beam from a substance to be analysed and a detector to detect a quantity of ions incident thereon. The detector includes two elements (16, 18) each of which detect a part of the quantity of ions and an attenuation device attenuates the quantity of ions reaching one of the detector elements. At least one of the detector elements (16, 18) is connected to a time to digital converter (TDC) to allow counting of the ions and at least one of the detector elements is connected in parallel to both a time to digital converter (TDC) and an analogue to digital converter (ADC).