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Fiber optic polychromator.

L S Combes, C C Gallagher

    Applied Optics
    |January 14, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new polychromator measures spectral line intensities in pulsed plasma. This device enables precise, simultaneous measurements at ten wavelengths for plasma diagnostics.

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    Area of Science:

    • Plasma Physics
    • Spectroscopy
    • Optical Engineering

    Background:

    • Pulsed plasmas generate complex spectral lines.
    • Accurate measurement of spectral line profiles is crucial for plasma diagnostics.
    • Existing methods may lack simultaneous multi-wavelength capabilities.

    Purpose of the Study:

    • To design and construct a polychromator for time-dependent spectral line profiling in pulsed plasmas.
    • To enable simultaneous measurement of light intensity at multiple discrete wavelengths.
    • To facilitate precise plasma electron density and temperature determinations.

    Main Methods:

    • A polychromator was designed and built.
    • A fiber optic device with ten parallel line-to-spot light guides was developed.

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  • The device transmits light from a monochromator to photomultiplier tubes for simultaneous detection.
  • Measurements were taken at ten wavelengths, spaced 1 Angstrom apart.

    • Main Results:

    • A compact and relatively simple polychromator was successfully constructed.
    • The device allows for simultaneous, precision measurements of spectral line intensities.
    • Time-dependent profiles of spectral lines were obtained.

    Conclusions:

    • The designed polychromator is effective for time-dependent spectral line analysis in pulsed plasmas.
    • The device enables precise, simultaneous multi-wavelength measurements.
    • It is a valuable tool for plasma electron density and temperature diagnostics.