To be able to detect gravitation waves in space, physicist have to measure truly minimal displacements: ten billion times smaller than the size of an atom. An improved superconducting sensor is a suitable candidate for this job, Martin Podt of the University of Twente now states in his PhD thesis. He has improved the sensitivity of a so-called ‘SQUID’ in way that it can be combined with a large ball-shaped gravitation detector. Podt succeeds in this by improving the sensitivity. He integrates the sensor with electronics and lowers the operating temperature. He is defending his Phd thesis on January 17, within the Faculty of Science of the University of Twente, The Netherlands.
Gravitation waves, ‘ripples in space’, are very interesting because they provide information about collisions in space. Physicist around the world are working on ways to detect them. Leiden University in The Netherlands currently develops a ball-shaped detector of 65 centimeters in diameter. This grows over a distance of no more than 10 exp –20 meter. To compare it with the size of the earth (and therefore multiplying the size by 20 million), you would like to detect a growth of one fifth of a picometer (one picometer is a millionth of a millionth of a meter).
The superconducting sensor Martin Podt of the University of Twente has designed and developed, gets to the desired sensitivity and can be combined with the MiniGrail system. It is a so-called Superconducting Qantum Interference Devices (SQUID). Podt has improved it by lowering the temperature to a value close to zero Kelvin, and by integrating sensor and electronics. “Our current SQUID did not reach the extreme demands of this application. We would then measure too much noise, and you simply cannot distinguish the noise from the parameter you want to measure,” says Podt. He lowers the temperature to about 20 milliKelvin -the MiniGrail is also cooled down to that temperature. The noise of the ‘conventional’ SQUID is introduced when the signal is amplified using an amplifier operating at room temperature. Podt therefore chooses to put the amplifier on the chip as well, so that both are operating at very low temperatures. The result is that it works substantially faster and introduces no noise.
Wiebe van der Veen | EurekAlert!
APEX takes a glimpse into the heart of darkness
25.05.2018 | Max-Planck-Institut für Radioastronomie
First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences