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Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
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Related Experiment Video

Updated: Jun 20, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

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Published on: July 27, 2018

Fast atomic line filter/field ionization detector.

S H Bloom, E Korevaar, M Rivers

    Optics Letters
    |September 18, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A new fast atomic line filter/field ionization detector (FALF/FID) uses resonant absorption and electric-field ionization for sensitive photon detection. This technology shows promise for high quantum efficiency and fast time response in scientific applications.

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    Last Updated: Jun 20, 2026

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    Area of Science:

    • Atomic physics
    • Laser spectroscopy
    • Photon detection

    Background:

    • Photon detection requires sensitive and fast methods.
    • Atomic vapor cells offer narrow-linewidth absorption.
    • Electric field ionization is a sensitive detection technique.

    Purpose of the Study:

    • To experimentally demonstrate a novel fast atomic line filter/field ionization detector (FALF/FID).
    • To evaluate the performance of the FALF/FID for photon detection.

    Main Methods:

    • Utilizing resonant absorption of signal photons in an atomic vapor cell.
    • Employing a strong electric field for ionization of excited atoms.
    • Using a pump laser to excite atoms to Stark-shifted Rydberg levels.

    Main Results:

    • Observed a tenfold enhancement in ionization rate over the continuum threshold.
    • Preliminary measurements show a time response under 10 nanoseconds.
    • Preliminary quantum efficiency measurements exceed 25%.

    Conclusions:

    • The FALF/FID demonstrates potential for high quantum efficiency and fast time response.
    • Optimization of the FALF/FID could lead to narrow-linewidth photon detection.
    • This detector is suitable for applications requiring sensitive and rapid photon detection.