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Gamma-ray polarimetry is a new powerful tool to study the processes responsible for the emission from astrophysical sources and the environments in which this emission takes place. Few successful polarimetric measurements have however been performed thus far in the gamma-ray energy band due to the difficulties involved. POLAR is a dedicated polarimeter designed to perform high precision measurements...
A hybrid microfluidic separation device that uses the crossflow and the centrifugation effect to separate human plasma from blood cells has been designed and fabricated. The chip mainly consists of the spiral microchannel, which is divided into inner and outer mcirochannels by micropillar arrays. The slits between the micropillars act as filter. Clogging and jamming in this filtration structure are...
In this paper, we developed an electrothermally driven RF MEMS capacitive switch, where the HfO2 film, deposited by atomic layer deposition (ALD) process, was used as insulation dielectric of the capacitor formed by the signal line and switching plate. Thanks high permittivity and excellent electrical and thermal isolation properties of the HfO2 film, as well as high driving force of the electrothermal...
Composite material technology has a great potential for development of new insulating materials. By use of computer simulation method to study the dielectric properties of composite material can save a lot of time and material resources. In this paper we have studied the dielectric properties of electric field grading non-linear composites through computer simulation and verified them with experimental...
Power cable insulation is subjected to thermal aging during its service life due to applied load or environmental conditions. Thermal aging may influence not only the electrical and physiochemical properties but also the initiation and propagation characteristics of electrical trees. In this paper we have investigated the electrical treeing behavior of XLPE cable insulation after accelerated thermal...
This paper describes the design, realization and testing of a refractometer based on the principle of transmission phase grating. An integrated multichannel microfluidic chip is used as a basic optical component for building the refractometer. A laser light beam is coupled to the top of the microfluidic chip and the generated diffraction pattern is recorded by a CCD camera and the intensities of the...
As the diffuser/nozzles are the key parts for micro diffuser/nozzle pumps, this paper reports a novel method for improving the flow efficiency by adding fins on its sidewall. The shape of the fin is imitative of the fish fins. Hence some fins fabricated through silicon micro-machining technology are integrated with the nozzle/diffusers. It has been testified that the big fins can improve the flow...
We present the first triple junction multibandgap cells incorporating three intrinsic absorber layers that are all deposited by hot wire CVD (Cat-CVD). The bottom and middle cell have a microcrystalline silicon (/spl mu/c-Si:H) absorber layer and the top cell has an amorphous silicon (a-Si:H) intrinsic layer. The cells are made in the configuration stainless steel/n-i-p/n-i-p/n-i-p/ITO and do not...
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