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 Smallest transistor worldwide switches current with a single atom in solid electrolyte
17.08.2018 | Karlsruher Institut für Technologie (KIT)

nachricht Protecting the power grid: Advanced plasma switch for more efficient transmission
17.08.2018 | DOE/Princeton Plasma Physics Laboratory

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: It’s All in the Mix: Jülich Researchers are Developing Fast-Charging Solid-State Batteries

There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.

The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Quantum bugs, meet your new swatter

20.08.2018 | Information Technology

A novel synthetic antibody enables conditional “protein knockdown” in vertebrates

20.08.2018 | Life Sciences

Metamolds: Molding a mold

20.08.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>