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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Characterization of a submillimeter high-angular-resolution camera with a monolithic silicon bolometer array for the

N Wang, T R Hunter, D J Benford

    Applied Optics
    |December 15, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new 24-pixel bolometer camera was developed for the Caltech Submillimeter Observatory (CSO), achieving sensitive astronomical observations in the 350- and 450-μm atmospheric windows. This instrument demonstrates performance close to the background limit, enhancing submillimeter astronomy capabilities.

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    Published on: January 30, 2020

    Area of Science:

    • Astronomy and Astrophysics
    • Instrumentation
    • Cryogenics

    Background:

    • Submillimeter astronomy requires sensitive detectors to observe faint atmospheric signals.
    • The Caltech Submillimeter Observatory (CSO) provides a platform for atmospheric window observations.

    Purpose of the Study:

    • To construct and characterize a 24-pixel bolometer camera for the CSO.
    • To assess the performance and sensitivity of the new instrument for astronomical observations.

    Main Methods:

    • Utilized a monolithic silicon bolometer array cooled to 300 mK with a (3)He refrigerator.
    • Employed field-effect transistors for first-stage amplification at 130 K.
    • Designed an optical system with mirrors and cold stops for sky imaging onto the array.

    Main Results:

    • Achieved detector noise of 5 × 10(-15) W/√Hz at 350 μm.
    • Measured a system noise-equivalent flux density of approximately 4 Jy/√Hz.
    • Demonstrated instrument sensitivity within 2.5 times the background limit.

    Conclusions:

    • The developed bolometer camera is a sensitive instrument for submillimeter astronomy.
    • The performance metrics indicate the camera is suitable for observations in the 350- and 450-μm atmospheric windows.
    • The instrument's capabilities approach the theoretical background limit for its operating wavelengths.