The 14th KAGRA International Workshop

Session

KAGRA R&D

16 May 2026, 11:00

Conveners

KAGRA R&D

• Takayuki Tomaru

Description

Join the Zoom Meeting

81. Quantum noise reduction schemes for KAGRA post-O5

Yuhang Zhao (Henan Academy of Sciences)

16/05/2026, 11:00

Oral presentation

Quantum noise has been the limiting noise at high frequency and a relevant noise at low frequency for the sensitivity of current gravitational wave detectors. It is also expected to be a limiting noise source for future interferometric gravitational wave detectors across the whole frequency band. Squeezed vacuum has become a standard tool for reducing quantum noise and led to up to 65\%...

89. Reducing Suspension Thermal Noise in KAGRA

Munetake Otsuka

16/05/2026, 11:20

Oral presentation

Improving thermal noise in the cryogenic sapphire suspension is one of the key factors for further enhancing the sensitivity of KAGRA.

In this presentation, the contribution of thermal noise from each component of the cryogenic sapphire suspension to the KAGRA sensitivity is first described.

Efforts to reduce thermal noise in the cryogenic sapphire suspension are then presented, focusing...

99. Mechanical tests on silicon fibers

Michele Arcangelo Dicorato

16/05/2026, 11:40

Oral presentation

To build suspensions for the main optics of 3G gravitational wave interferometers that will operate at cryogenic temperatures, one must consider the triple roles that the system plays: suspend 200kg mirrors, cool them and ensure the lowest possible thermal noise. In this talk, we will present the results of the latest mechanical tests performed on silicon fibers to understand what is the state...

102. FLECS: a finite elements simulation tool for prototyping GAS spring blades

Nicolo Baldicchi (Università degli studi di Perugia)

16/05/2026, 12:00

Oral presentation

FLECS (Flexible Linear Elements Connected in Series) is a finite elements simulation code under construction that simulates the static and dynamic behavior of spring blades in a geometric anti-spring (GAS) configuration. In this talk insights of the working principles of the code and some potential outcomes will be discussed, along with a description of the experiment designed to provide...

103. A fiber optic continuos strain sensing plant for CAOS in Perugia

Piero Chessa (University of Perugia)

16/05/2026, 12:20

Oral presentation

The construction of CAOS in Perugia allowed to insert optical fibers embedded in the building to measure local strain with spatial resolution. This will be measured by means of a Distributed Acoustic Sensing interrogator Silixa Carina, with nominal spatial resolution down to a quarter of a meter. We report about the plant installation.

84. Fast Time-Domain Simulation of Fabry–Pérot Cavities for Reinforcement Learning-Based Lock Acquisition

Andrea Svizzeretto

16/05/2026, 12:40

Oral presentation

We present a fast time-domain simulator designed to reproduce the dynamical behavior of Fabry–Pérot cavities. The simulator implements a recursive field propagation formalism that explicitly accounts for multiple round trips within the cavity, enabling accurate modeling of transient phenomena such as ring-down, during resonance crossings. It supports step by step dynamic mirror motion and...

91. Magnetically levitated massive resonators for quantum sensing

Shilu Tian (Institute of Science Tokyo)

16/05/2026, 13:00

Oral presentation

Levitated mechanical resonators have the potential to achieve low mechanical loss and high quality factor (Q factor), which is critical for many applications, e.g. high precision sensors, and exploring fundamental quantum physics. Diamagnetic levitation is a promising technique, which requires no energy input and can trap massive objects. However, conductive pyrolytic graphite, one of the...