The Brazilian spherical detector: progress and plans

Autor:	K L Ribeiro, S R Furtado, Giorgio Frossati, S.L.T. de Souza, Odylio D. Aguiar, E S Matos, Rubens M. Marinho, Nadja S. Magalhães, L A Andrade, Bruno Woltzenlogel Paleo, Lucrecia Camilo De Lima, Carlos Frajuca, Pedro J. Castro, J. C. N. de Araujo, A U de Lucena, Cecília Silva de Castro, L. Camargo Filho, K M F Costa, A C Fauth, M Remy, W. de Paula, Nei F. Oliveira, Joaquim J. Barroso, Oswaldo D. Miranda, C Stellati, E C de Rey Neto, L A Carneiro, J L Melo, J. Weber, W F Velloso, C. A. Costa
Rok vydání:	2004
Předmět:	Physics Gravitational-wave observatory Vibration isolation Optics Transducer Physics and Astronomy (miscellaneous) business.industry Bandwidth (signal processing) Detector Phase noise dBc Figure of merit business
Zdroj:	Classical and Quantum Gravity. 21:S457-S463
ISSN:	1361-6382 0264-9381
DOI:	10.1088/0264-9381/21/5/011
Popis:	We are building the Schenberg gravitational wave detector at the Physics Institute of the University of Sao Paulo as programmed by the Brazilian Graviton Project. The antenna and its vibration isolation system are already built, and we have made a first cryogenic run for an overall test, in which we measured the antenna mechanical Q (figure of merit). We also have built a 10.21 GHz oscillator with phase noise performance better than -120 dBc at 3.2 kHz to pump an initial CuA16% two-mode transducer. We plan to prepare this spherical antenna for a first operational run at 4.2 K with a single transducer and an initial target sensitivity of h ∼ 2 x 10 -21 Hz -1/2 in a 50 Hz bandwidth around 3.2 kHz soon. Here we present details of this plan and some recent results of the development of this project.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e75b4c433b97199b282465aa1f1e2d5c https://doi.org/10.1088/0264-9381/21/5/011 Zobrazit plný text záznamu