Mario Schenberg (Gravitational Wave Detector)

{{Update|date=July 2021}}

{{Infobox telescope}}

The Mario Schenberg (Gravitational Wave Detector, or Brazilian Graviton Project{{cite journal| last=Aguiar |display-authors=etal| title=The status of the Brazilian spherical detector.| journal=Class. Quantum Grav.| volume=19|pages=1949–1953| number=1949|date=October 2002| doi=10.1088/0264-9381/19/7/397|bibcode = 2002CQGra..19.1949A |s2cid=250864475 }} or Graviton) is a spherical, resonant-mass, gravitational wave detector formerly run by the Physics Institute of the University of São Paulo, named after Mário Schenberg. Similar to the Dutch-run MiniGrail, the 1.15 ton, 65 cm diameter spherical test mass is suspended in a cryogenic vacuum enclosure, kept at 20 mK; and the sensors (transducers) for this detector/antenna are developed at the National Institute for Space Research (INPE), in Sao José dos Campos, Brazil.{{cite journal| last=Aguiar| display-authors=etal| title=The Brazilian gravitational wave detector Mario Schenberg: progress and plans.| journal=Class. Quantum Grav.| volume=22| pages=S209–S214| number=10|date=April 2005| doi=10.1088/0264-9381/22/10/011|bibcode = 2005CQGra..22S.209A | citeseerx=10.1.1.497.325| s2cid=110087646}}{{cite journal| last=Aguiar| display-authors=etal| title=The Schenberg spherical gravitational wave detector: the first commissioning runs.| journal=Class. Quantum Grav.| volume=25| pages=114042| number=11|date=May 2008| doi=10.1088/0264-9381/25/11/114042|bibcode = 2008CQGra..25k4042A | s2cid=122231110}} As of 2016, the antenna has not detected any gravitational waves, and development of the antenna continues. It has been decided that the antenna will be transferred from the University of São Paulo to INPE.{{cite journal| last=Oliveira Jr| display-authors=etal| title=The Mario Schenberg Gravitational Wave Antenna | journal=Brazilian Journal of Physics| volume=46| pages=596–603| number=5|date=October 2016| doi=10.1007/s13538-016-0436-1| bibcode=2016BrJPh..46..596O| s2cid=256197402}}