Albert Einstein’s Theory of General Relativity predicts that gravitational waves travel across the universe at the speed of light, but he also predicted such waves would never be observed. Researchers around the world are hoping to prove him wrong—about the detection, that is—with experiments such as the LIGO Scientific Collaboration. Researchers from the Deep Underground Gravity Laboratory, or DUGL (“DOO-guhl”) have installed sensitive instruments in the Sanford Underground Research Facility to determine whether it is suitable for a large gravitational wave experiment.
Three research groups at the Sanford Underground Laboratory at Homestake detected recent earthquakes in Japan, Chile, Haiti and Mexico -- as well as last September's tsunami in the Pacific Ocean. The data illustrate how the Sanford Lab, as the nation's Deep Underground Science and Engineering Laboratory, will play a major role in future explorations into the structure of planet earth.
By: Jan Harms, Angelo Sajeva, Riccardo Desalvo and Vuk Mandic The instruments and the data acquisition are controlled remotely from our lab which is inside the Ross dry. Also, the data is regularly transmitted to our lab where we can start to analyze it. In the near future, we will have access to this system from any place in the world, so that we and our colleagues can work with the data, where ever we are and whenever needed. In the end, all data – each station produces about 2 GByte each day – will be copied to storage and analysis facilities at the California Institute of Technology.
By: Jan Harms, Angelo Sajeva, Riccardo Desalvo and Vuk Mandic At each station, one rigid-foam panel hut houses the sensors, whereas a second hut houses a computer and a power supply. The sensor hut serves as shield againstacoustic noise and water.Inside the sensor hut is another container which serves as additional shield. The green instrument on the picture is our high-sensitivity seismometer. It has to be shielded against air currents and noise.