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GWADW2026 - Gravitational-Wave Advanced Detector Workshop

17–23 May 2026
Hotel Hermitage, La Biodola, Isola d'Elba
Europe/Rome timezone

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Session

Stray Light

21 May 2026, 16:00
Hotel Hermitage, La Biodola, Isola d'Elba

Hotel Hermitage, La Biodola, Isola d'Elba

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  1. 51. Scattered light noise at LIGO Livingston Observatory in O4
    Debasmita Nandi (Louisiana State University)
    21/05/2026, 16:00
    Stray Light
    Presentation

    Scattered light is one of the most common sources of noise in the LIGO detectors. Light scattering is a highly non-linear process through which motion at low frequencies gets up-converted and creates noise in a higher frequency band in the detector data. From the beginning of the fourth observation run, a lot of glitches appeared in the data of LIGO Livingston detector in the frequency range...

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  2. 2. New instrumented baffles for the main input mirrors of the Virgo experiment
    Lluïsa-Maria Mir
    21/05/2026, 16:18
    Stray Light
    Presentation

    As part of the Advanced Virgo upgrade program for the O5 observing run, IFAE has designed and constructed two instrumented baffles for installation near the interferometer input mirrors, extending the concept successfully implemented on the input mode cleaner during O4. The new baffles feature an enlarged geometry, 120 integrated photosensors, and a 1 kHz data acquisition system, with support...

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  3. 28. Stray Light Analysis and Mitigation Perspectives for Next Generation Gravitational-Wave Detectors
    Eleonora Polini (CNRS / OCA / ARTEMIS)
    21/05/2026, 16:36
    Stray Light
    Presentation

    The low-frequency sensitivity of gravitational-wave detectors can be degraded by noise arising from the re-coupling of stray light with the main interferometer beam. This contribution describes the re-coupling mechanism and shows how the experience gained with current detectors can be used to anticipate and mitigate stray-light issues in third-generation instruments. We summarize the work...

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  4. 16. Modeling of the Cosmic Explorer beam tube baffles
    Hiroaki Yaamoto
    21/05/2026, 16:54
    Stray Light
    Presentation

    Beam tube baffles are a significant noise source in large gravitational-wave interferometers. This issue was studied for the initial LIGO and Virgo detectors, but the design must be revisited for next-generation observatories such as Cosmic Explorer and Einstein Telescope. The original baffle design relied on the hardware knowledge and materials available at the time, and the analysis used...

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  5. 37. Beamtube Design Optimization from a Stray Light Perspective
    Antonios Kontos (Bard College)
    21/05/2026, 17:12
    Stray Light
    Presentation

    The proposed long arms of future gravitational-wave detectors pose particular challenges from the perspective of stray light. Light scattered at very low angles from the test masses can interact with the vacuum tubes and couple back to the cavity mode, imprinting phase fluctuations it picked up along the way. A straightforward mitigation technique is the installation of baffles on the tube,...

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