Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

For the Earth and in Space: New Measuring Device for Monitoring Radiation

26.11.2007
In radiation protection the motto is: As little radiation as at all possible! Whoever wants to convert this to action, however, must first know how high the current radiation exposure actually is.

A new type of measuring device which can even register several types of radiation simultaneously, comes at the right time here. The physicist Dr. Marlies Luszik-Bhadra from the Physikalisch-Technische Bundesanstalt has, together with a partner from industry, developed a measuring device which can measure neutron- and photon radiation at the same time.

This personal dosimeter is a handy device which has a direct readout and an alarm function. It was possible by means of an invention - the essential principles of which have been patented - to make the dosimeter especially light and compact. For the technology transfer to the Synodys group, Marlies Luszik-Bhadra and her colleagues Wilfried Wendt and Mathias Weierganz receive this year's Technology Transfer Prize of the Industrie- und Handelskammer Braunschweig (Braunschweig Chamber of Commerce and Industry).

Natural neutron radiation surrounds us constantly - caused by the collision of high-energy cosmic particles with the molecules of our Earth's atmosphere. The intensity of this neutron radiation increases thereby with height and is especially relevant for flights, so that the radiation dose of flight personnel is continuously monitored. In contrast to this, humans themselves are responsible for the artifical neutron radiation on the ground. It is found in medical applications such as in tumour therapy, is used in non-destructive material testing, and is always present in nuclear power plants.

In general, however, neutron radiation seldom occurs alone. In most cases it is even the smaller component - above all in comparison to photon radiation (gamma radiation). A measuring device which includes both radiation components simultaneously is thus an ideal tool to monitor radiation-critical environments.

The personal dosimeter developed by Luszik-Bhadra, together with the Synodys group, is able to measure both radiation components in a handy and moreover very light device. It is the currently smallest dosimeter for mixed neutron/photon radiation fields. Compared to conventional laboratory electronics, the construction is smaller by a factor of 1000. The innovative idea thereby is in the interior construction of the detector. Whereas up to now, several semiconductor detectors have always been used for the construction of a neutron dosimeter, the new dosimeter gets by with a single detector surrounded by several thin absorber layers.

Hence the dosimeter is open to diverse fields of application: from medicine to nuclear technology and also to space-related assignments. For the crew of the International Space Station ISS - a place with especially intensive radiation - the measurement of the current radiation exposure is of particular importance. Up to now, passive dosimeters have been used here which can only be evaluated later on the Earth. A test application of the new direct-readout dosimeter is now being discussed with the European Space Agency ESA.

Erika Schow | alfa
Further information:
http://www.ptb.de/en/aktuelles/archiv/presseinfos/pi2007/pitext/pi071123.htm

More articles from Physics and Astronomy:

nachricht SF State astronomer searches for signs of life on Wolf 1061 exoplanet
20.01.2017 | San Francisco State University

nachricht Molecule flash mob
19.01.2017 | Technische Universität Wien

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: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>