Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

‘Listen, two black holes are clashing!’

26.11.2004


MiniGRAIL: first spherical gravitational wave antenna in the world

Since last week, Professor Giorgio Frossati of Leiden University’s Institute of Physics can ‘listen’ to gravitational waves. That is, if such a wave happens to come along. Gravitational waves originate from violent clashes between black holes in the universe and from instabilities in neutron stars.

MiniGRAIL is the name of the first spherical gravitational wave antenna in the world. The ball was made at the Leiden Institute of Physics (LION) of Leiden University. It is the product of years of close cooperation between Frossati’s research group and the technicians of the fine-mechanic and electronic workshop in the Institute. “A result to be proud of”, says Professor Peter Kes, LION’s scientific director.



The MiniGRAIL detector is made of copper with a pinch of aluminium (6%), has a diameter of 65 cm and weighs 1150 kilos. If a gravitational wave passes by the antenna, it will transmit a very small part of its energy to the ball. Gravity waves with a frequency of circa 3000 hertz will make the ball vibrate in all kinds of different ways.

Yet, these vibrations are very small, a billionth of a billionth part of a centimetre (10 -20 m), which makes them very difficult to measure. MiniGRAIL will have to attain a sensitivity good enough to detect these ultra-small vibrations. Astronomers predict that at the frequency and amplitude of such ultra-small vibrations various sources of gravitational waves can be measured, like clashes of black holes and instabilities in neutron stars.

In order to preclude false vibrations as much as possible, MiniGrail is built on vibration-free poles, and the ball is cooled down to ultra-low temperatures. At this moment the ball is 4 Kelvin, which is -269 degrees Celsius. This is as cold as it can get in the coldest corners of the universe. In a number of weeks the ball’s temperature will be decreased even more, to reach record depth, and then the scientific race will break loose: who in the world will be the first to measure gravitational waves?

The race will be between American teams, an Italian team and Frossati’s own team. Still, cooperation will be more important than competition. “You can never be sure you have measured a gravitational wave until you have compared notes with the other teams. Only if all of us, simultaneously, have a hit will we know that it was indeed a gravitational wave.”

Eppo Bruins | alfa
Further information:
http://www.nieuws.leidenuniv.nl/index.php3?m=&c=373
http://www.leidenuniv.nl

More articles from Physics and Astronomy:

nachricht Attosecond camera for nanostructures
31.05.2016 | Max-Planck-Institut für Quantenoptik

nachricht Rosetta’s comet contains ingredients for life
30.05.2016 | Universität Bern

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attosecond camera for nanostructures

Physicists of the Laboratory for Attosecond Physics at the Max Planck Institute of Quantum Optics and the Ludwig-Maximilians-Universität Munich in collaboration with scientists from the Friedrich-Alexander-Universität Erlangen-Nürnberg have observed a light-matter phenomenon in nano-optics, which lasts only attoseconds.

The interaction between light and matter is of key importance in nature, the most prominent example being photosynthesis. Light-matter interactions have also...

Im Focus: Worldwide Success of Tyrolean Wastewater Treatment Technology

A biological and energy-efficient process, developed and patented by the University of Innsbruck, converts nitrogen compounds in wastewater treatment facilities into harmless atmospheric nitrogen gas. This innovative technology is now being refined and marketed jointly with the United States’ DC Water and Sewer Authority (DC Water). The largest DEMON®-system in a wastewater treatment plant is currently being built in Washington, DC.

The DEMON®-system was developed and patented by the University of Innsbruck 11 years ago. Today this successful technology has been implemented in about 70...

Im Focus: Computational high-throughput screening finds hard magnets containing less rare earth elements

Permanent magnets are very important for technologies of the future like electromobility and renewable energy, and rare earth elements (REE) are necessary for their manufacture. The Fraunhofer Institute for Mechanics of Materials IWM in Freiburg, Germany, has now succeeded in identifying promising approaches and materials for new permanent magnets through use of an in-house simulation process based on high-throughput screening (HTS). The team was able to improve magnetic properties this way and at the same time replaced REE with elements that are less expensive and readily available. The results were published in the online technical journal “Scientific Reports”.

The starting point for IWM researchers Wolfgang Körner, Georg Krugel, and Christian Elsässer was a neodymium-iron-nitrogen compound based on a type of...

Im Focus: Atomic precision: technologies for the next-but-one generation of microchips

In the Beyond EUV project, the Fraunhofer Institutes for Laser Technology ILT in Aachen and for Applied Optics and Precision Engineering IOF in Jena are developing key technologies for the manufacture of a new generation of microchips using EUV radiation at a wavelength of 6.7 nm. The resulting structures are barely thicker than single atoms, and they make it possible to produce extremely integrated circuits for such items as wearables or mind-controlled prosthetic limbs.

In 1965 Gordon Moore formulated the law that came to be named after him, which states that the complexity of integrated circuits doubles every one to two...

Im Focus: Researchers demonstrate size quantization of Dirac fermions in graphene

Characterization of high-quality material reveals important details relevant to next generation nanoelectronic devices

Quantum mechanics is the field of physics governing the behavior of things on atomic scales, where things work very differently from our everyday world.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Networking 4.0: International Laser Technology Congress AKL’16 Shows New Ways of Cooperations

24.05.2016 | Event News

Challenges of rural labor markets

20.05.2016 | Event News

International expert meeting “Health Business Connect” in France

19.05.2016 | Event News

 
Latest News

Better combustion for power generation

31.05.2016 | Power and Electrical Engineering

Stick insects produce bacterial enzymes themselves

31.05.2016 | Life Sciences

In a New Method for Searching Image Databases, a Hand-drawn Sketch Is all it Takes

31.05.2016 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>