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
Light-driven atomic rotations excite magnetic waves
24.10.2016 | Max-Planck-Institut für Struktur und Dynamik der Materie
Move over, lasers: Scientists can now create holograms from neutrons, too
21.10.2016 | National Institute of Standards and Technology (NIST)
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
24.10.2016 | Earth Sciences
24.10.2016 | Life Sciences
24.10.2016 | Physics and Astronomy