Thermo Fisher Scientific (bremen) Gmbh

Silke Seedorf

Michael Krummen

Michael Deerberg

Ronald Seedorf

Johannes Schwieters

A method of configuring a Faraday detector in a mass spectrometer is described. The mass spectrometer defines a central ion beam axis, and the Faraday detector is moveable relative to the central ion beam axis. The Faraday detector includes a detector arrangement having a detector surface, and a Faraday slit defining an entrance for ions into the detector arrangement. The Faraday detector has an axis of elongation which extends through the Faraday slit. A width of the Faraday slit is chosen, and the angle between the axis of elongation of the Faraday detector and the central ion beam axis is adjusted such that ions striking the detector surface do not generate secondary electrons.

Detector and slit configuration in an isotope ratio mass spectrometer

A magnetic adjustment mechanismcomprising a chamber, an elementpivotally mounted within the chamberand comprising a magnetic portion, and a magnetic actuatorarranged outside the chamberto allow magnetic coupling with the magnetic portionof the elementsuch that movement of the magnetic actuatorcauses an adjustment of the position of the element. The adjustment mechanismmay be used within a vacuum chamber of a mass spectrometer to control the position of a moveable element from outside the chamber.

Adjustment mechanism

The invention concerns a vacuum system, comprising a first vacuum chamber and a second vacuum chamber, the first vacuum chamber being evacuated by a first vacuum pump, in particular a turbomolecular pump, the first and the second vacuum chamber being connected by a passage, wherein the passage is surrounded by a sealing arrangement comprising an inner seal and an outer seal with a plenum positioned between the inner seal and the outer seal, the plenum being evacuated by a support vacuum pump, and wherein at least one sealing face of the inner seal consists of the wall material of the first or the second vacuum chamber, in particular the inner seal being formed by direct contact between the wall material of the first vacuum chamber and the wall material of the second vacuum chamber. Additionally, the invention concerns a mass spectrometry system.

Vacuum system

A mass spectrometer for analyzing isotopic signatures, with at least one magnetic analyzer and optionally with an electric analyzer as well, with a first arrangement of ion detectors and/or ion passages and, arranged downstream thereof in the direction of the ion beam, a second arrangement of ion detectors, with at least one deflector in the region of the two arrangements of ion detectors or between these arrangements. Additionally, a multi-collector arrangement, special uses and a method for analyzing isotopes in a sample. The mass spectrometer according to the invention has a control for the at least one deflector such that ion beams of different isotopes can be routed to at least one ion detector in the second arrangement.

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Weyhe, Germany

Silke Seedorf