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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Tandem multipass Fabry-Perot interferometer for Brillouin scattering.

J G Dil, N C van Hijningen, F van Dorst

    Applied Optics
    |March 24, 2010
    PubMed
    Summary

    A novel Fabry-Perot interferometer design enhances mirror stability. Two synchronized interferometers enable advanced Brillouin scattering studies on thin films and surfaces.

    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Acoustics

    Background:

    • Fabry-Perot interferometers are crucial for high-resolution spectroscopy.
    • Achieving stable, high-performance interferometers requires careful design, particularly for mirror support and coatings.
    • Tandem configurations can improve spectral resolution but present synchronization challenges.

    Purpose of the Study:

    • To present a new design for a plane mirror Fabry-Perot interferometer with improved mirror support.
    • To demonstrate the synchronization of two piezoelectrically scanned Fabry-Perot interferometers for tandem operation.
    • To apply the tandem system to investigate Brillouin scattering in materials.

    Main Methods:

    • A novel Fabry-Perot interferometer design featuring freely supported mirror blanks on horizontal rings.

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  • Detailed characterization of mirror surface flatness and dielectric coating quality.
  • Synchronization of two independently scanned interferometers using standard optical and electronic components.
  • Application of the synchronized tandem system to Brillouin spectroscopy.

    • Main Results:

    • The new interferometer design ensures stable mirror support and high surface flatness.
    • Successful synchronization of two piezoelectrically scanned Fabry-Perot interferometers was achieved.
    • Brillouin spectra were successfully obtained for supported thin plastic films and a clamped metal surface.
    • The tandem system demonstrated effective application in materials analysis via Brillouin scattering.

    Conclusions:

    • The described Fabry-Perot interferometer design offers enhanced stability and performance.
    • Tandem operation of synchronized Fabry-Perot interferometers is feasible with standard equipment.
    • The system is well-suited for advanced Brillouin scattering investigations of material properties.