This technology, which is expected to lower the cost of particle accelerators, is featured in the current issue of the research magazine Pictures of the Future.
People often associate particle accelerators with large laboratories such as CERN and DESY. In fact, most of the around 30,000 facilities in use worldwide are located in clinics and industry. At the heart of an accelerator is a high-frequency generator that produces high voltages at several hundred megahertz. They are based on electron tubes that require a sophisticated high voltage electrical supply and reach a maximum efficiency of 60 percent.
In order to achieve a higher efficiency the CT researchers are using transistors based on the semiconductor silicon carbide. These components work at very high frequencies, cope with high power outputs and offer up to 70 percent efficiency. One such transistor has an output of several kilowatts and is easily a hundred times smaller than a comparable electron tube. Now, modules made up of several transistors can achieve a power output of 160 kilowatts at a frequency of 324 megahertz. These values are roughly what medical and industrial applications require. The next step is to produce units with an output of around three megawatts suitable for scientific applications.
The researchers are also using semiconductor technology to develop inexpensive standardized control cabinets for the drive units of accelerators. It will also be possible to combine these cabinets according to the needs of a given situation. A prototype should be ready in 2013.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
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First flat lens for immersion microscope provides alternative to centuries-old technique
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Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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23.05.2017 | Event News
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26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy