Towards the SQL: Status of the direct thermal-noise measurements at the ANU

Autor:	Malcolm B. Gray, C. M. Mow-Lowry, S Goßler, J Cumpston, David E. McClelland, B. J. J. Slagmolen
Rok vydání:	2006
Předmět:	History Materials science business.industry Bandwidth (signal processing) Niobium chemistry.chemical_element Zerodur Reference cavity Laser Computer Science Applications Education law.invention Inverted pendulum Finesse Optics chemistry law High bandwidth business
Zdroj:	Journal of Physics: Conference Series. 32:362-367
ISSN:	1742-6596 1742-6588
Popis:	We present the preliminary results for an experiment that aims to perform direct measurements of suspension thermal noise. The experiment is based on a niobium flexure membrane approximately 200 µm thickness that is operated as a stable inverted pendulum. A 0.25 g mirror suspended by this flexure membrane is used as the end mirror of a Fabry-Perot test cavity. This test cavity has a length of 12mm and a finesse of about 800. It is mounted at the lowest stage of a quadruple cascaded pendulum suspension, enclosed in a high-vacuum envelope. The length of test cavity is stabilized with 1Hz bandwidth to a Nd:YAG laser, which itself is stabilized with high bandwidth to the length of a suspended Zerodur reference cavity of finesse 6000.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::66fc684c03172fb8f92dae17b5ebf436 https://doi.org/10.1088/1742-6596/32/1/055 Zobrazit plný text záznamu