Evaluation of heat extraction through sapphire fibers for the GW observatory KAGRA
From MaRDI portal
Publication:4979706
DOI10.1088/0264-9381/31/10/105004zbMATH Open1291.83087arXiv1401.2346OpenAlexW2048898451WikidataQ59450840 ScholiaQ59450840MaRDI QIDQ4979706
Author name not available (Why is that?)
Publication date: 19 June 2014
Published in: (Search for Journal in Brave)
Abstract: Currently, the Japanese gravitational wave laser interferometer KAGRA is under construction in the Kamioka mine. As one main feature, it will employ sapphire mirrors operated at a temperature of 20K to reduce the impact from thermal noise. To reduce seismic noise, the mirrors will also be suspended from multi-stage pendulums. Thus the heat load deposited in the mirrors by absorption of the circulating laser light as well as heat load from thermal radiation will need to be extracted through the last suspension stage. This stage will consist of four thin sapphire fibers with larger heads necessary to connect the fibers to both the mirror and the upper stage. In this paper, we discuss heat conductivity measurements on different fiber candidates. While all fibers had a diameter of 1.6mm, different surface treatments and approaches to attach the heads were analyzed. Our measurements show that fibers fulfilling the basic KAGRA heat conductivity requirement of 5000W/m/K at 20K are technologically feasible.
Full work available at URL: https://arxiv.org/abs/1401.2346
No records found.
No records found.
This page was built for publication: Evaluation of heat extraction through sapphire fibers for the GW observatory KAGRA
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q4979706)
