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07.10.2019 14:53 Età: 11 days
Categoria: Appuntamenti

Matteo Leonardi: "The next generation of Gravitational Wave Interferometers: the KAGRA case"

Lunedì 21-10-2019, ore 15:00, Aula "C. Voci"


Lunedì 21-10-2019 alle ore 15:00 in Aula "C. Voci" (sede Fisica), Matteo Leonardi del National Astronomical Observatory of Japan, terrà il seminario

"The next generation of Gravitational Wave Interferometers: the KAGRA case"

Abstract:


Gravitational wave (GW) science has received a tremendous momentum in the last years following the pioneering detections of spectacular cosmic events such as the collisions between black holes and neutron stars. Those achievements have been possible thanks to the scientific and technologic developement of GW interferometers as extremely sensitive instruments capable of detecting incredibly small length changes of the order of one part over 10^21: the size of an atom compared to the Earth - Sun distance. In an effort to push the detection sensitivity beyond its current limit, new instruments are nowadays being built exploiting new and even more powerful technologies. This effort requires a synergy of several different disciplines, including optics, solid state physics, quantum science and so on. The KAGRA interferometer is the first 2.5 generation GW detector, and the lessons learned from it will bridge the gap of knowledge necessary for the realization of the next generation of GW detectors. Besides using the state - of the art technologies of GW science, such as quantum noise reduction by injection of squeezed vacuum states and ultra-stable optical systems, KAGRA is the world's first underground kilometer-scale GW detector which uses cryogenic temperature test masses. The construction phase officially ended this summer and now the interferometer is at the commissioning stage, looking forward to join the LIGO-Virgo gravitational detector network in their third observation run (O3). In this seminar, the status of KAGRA will be presented highlighting some of the most important aspects of the next generation GW detectors.