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Related Experiment Videos

Investigation of cables for ionization chambers

J J Spokas, R D Meeker

    Medical Physics
    |March 1, 1980
    PubMed
    Summary

    Two low-noise triaxial cables with solid Teflon dielectric offer superior performance for ionization chamber current measurements. These cables minimize noise currents from movement, polarization, and radiation, ensuring accurate data acquisition.

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    Area of Science:

    • Instrumentation and Measurement
    • Nuclear Physics
    • Electrical Engineering

    Background:

    • Ionization chambers are crucial for measuring radiation.
    • Accurate current measurements are vital for reliable data.
    • Cable selection significantly impacts signal integrity in sensitive measurements.

    Purpose of the Study:

    • To critically evaluate seven coaxial cables for ionization chamber applications.
    • To identify cables with optimal performance characteristics for carrying generated currents.
    • To compare low-noise triaxial and two-conductor cables.

    Main Methods:

    • Studied inherent noise currents, movement-induced currents, and polarization currents.
    • Assessed electrostatic shielding effectiveness of the central conductor.
    • Evaluated radiation-induced cable currents for each cable type.

    Main Results:

    • Two low-noise triaxial cables demonstrated superior performance.
    • Cables with solid Teflon dielectric surrounding the central conductor were most effective.
    • Performance was assessed based on noise, shielding, and radiation sensitivity.

    Conclusions:

    • Low-noise triaxial cables with solid Teflon dielectric are recommended for ionization chamber applications.
    • These cables provide the best overall performance for minimizing signal interference.
    • Careful cable selection is essential for accurate ionization chamber measurements.

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