Gravitational Radiation Antenna In Leiden
Kamerlingh Onnes Laboratory, Leiden University, The Netherlands
click here for an overview of the 6th cryogenic run of MiniGRAIL
Sensitivity of MiniGRAIL reached during run 6, May - July 2004
|The first graph shows the sensitivity curve of MiniGRAIL reached during run 6 - 2004. The SQUID noise was about 1.6 m F0 / Hz-1/2 (~ 700 hbar). The peak sensitivity was about 1.5 x 10-20 for the three most coupled modes. The effective temperature for a burst signal was 70 mK. We calculated sensitivity for a simple model of one transducer coupled to one mode (like a bar antenna) using the parameters of run 6 (magenta curve in figure 1). Using this model, we can estimate the sensitivity which could be reached during the next run when cooling the sphere down to 80 mK (green curve). The expected peak sensitivity will be a few times 10-22 and the effective temperature for a burst signal is expected to be about 40 mK.|
Figure 1 Strain sensitivity per Hz1/2 of MiniGRAIL during run 6. The white curve show the measured sensitivity. The magenta curve show the calculated sensitivity for a simple model of one transducer coupled to one mode (like a bar antenna) for the parameters of run 6.The green curve gives the sensitivity expected for the next cryogenic run.
Figure 2 Sensitivity of MiniGRAIL compared to the most recent sensitivity curves of the other gravitational wave detectors