B ARC Centre reports HF Gravitational Wave Antenna

[.Scott]

The full title of the publication is:

Rare Events Detected with a Bulk Acoustic Wave High Frequency Gravitational Wave Antenna​

It is published in Physics Review Letters and reported in Phys Org.

They have created a small piezo-electric device (< 2cm, though it gets bigger once you create an appropriate cryogenic environment for it) that can be used to detect HF gravitational pulses - or perhaps dark matter particles.

Now I want them to create 3 satellites and put each into an Earth orbit orthogonal to the others. If they really can detect Dark Matter particles, this would allow us to determine what directions these particles are passing through us.

 

[Keith_McClary]

Sabine says:
The wave-lengths of gravitational waves emitted in such merger events are typically of the same order as the dimension of the system.
If so, the source of these

High Frequency​

waves is grape sized.

 

[mfb]

The size of the detector is not the wavelength they are sensitive to. They are sensitive at a few MHz, i.e. ~50 m wavelength.

Something happened, that much is clear from figure 4. It's unfortunate they don't have a second parallel detector. GW would excite both coherently, dark matter particles would only hit one, many background sources could influence the two detectors differently or show up in only one of them.