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As one of the most important electrical components in distribution systems, the Miniature circuit breaker(MCB) has been widely used to protect the electrical equipment. In particular, the low-voltage dc circuit breaker intrigues more and more researchers recently. In this type of circuit breaker, an electric arc is formed in the interrupting process which is a transient arc plasma in a complex chamber...
We report temperature-dependence and temporal stability studies of AlxIn1−xAsySb1−y-based avalanche photodiodes (APDs). Multiplication gain and breakdown voltage of AlxIn1−xAsySb1−y APDs have shown low gain-temperature coefficients for a wide range of temperature.
Neutral beam injection (NBI) has been a main heating method except the Ohmic heating in Tokamaks. Due to the high current and power, in order to ensure the safety of NBI, the temperature of all of the components that can be heated should be monitored. As the high voltage is high up to 80kV, and the neutral beam injector work in the complex electromagnet environment of EAST, these bring a big interference...
In safety-critical systems, many-processor Systems-on-Chip are being increasingly employed. An example is an imminent collision detection System-on-Chip for cars. Such a system requires zero downtime and a very high reliability despite aging issues under harsh environmental conditions. By monitoring the health status of processor cores and other IPs, and taking appropriate counteractions if required,...
There are a lot of systems of carbon nanotubes synthesis. One of the most common is arc discharge system. The disadvantage of this method is its efficiency, repeatability, and control of the system. This work is a proposal of application of an electromagnetic field as an improvement of the arc discharge system. Among different solutions of the electromagnetic field generation, the coil placed on the...
Diamond-like carbon films (DLC) were deposited on both the Si(100) and stainless steel substrate by means of Microwave Plasma enhanced chemical vapor deposition (PECVD) under the open-air. From the XPS measurements, the sp2/(sp2+sp3) ratio of the DLC film is similar to that of the film grown by the conventional PECVD. In the pulse-modulated microwave PECVD growth at the duty ratio 30%, the impurity...
This work presents the results of investigations of electrical properties of Ca3Co4O9 and Ca3Co3.9Fe0.1O9 nanocomposite samples produced by standard ceramic technology using various synthesis parameters. The frequency-temperature analysis of the materials conductivity is presented. All the samples demonstrate dielectric type of properties. The heat treatment parameters during the production of nanocomposites...
We present optimized THz detectors based on AlGaN/GaN field-effect transistors with integrated broadband bow-tie antennas (bow-tie TeraFETs). Designed with a comprehensive circuit model and fabricated with a recently developed AlGaN/GaN MMIC process, the devices reach a performance at room temperature which hitherto has only been achieved with Si CMOS TeraFETs. Capable of broadband detection from...
We describe time-domain terahertz spectroscopy measurements of the frequency-dependent conductivity in MnSi thin films. We find that at low temperatures and frequencies, the scattering rate is proportional to both the square of the temperature and the square of the frequency, as predicted Fermi liquid theory. Unlike measurements on many other systems, the prefactors for each functional dependence...
A truly rigorous and quantitative approach to Black Body radiation is the fundamental starting point of experimental Radiometry in the region of Far Infrared and Millimeter waves (FIR). Absolute (i.e. calibrated) measurements of electromagnetic radiation are widely used in many areas of Physics, from Plasma Diagnostics in Nuclear Fusion, to Radio Astronomy and Atmospheric Physics. Along the years...
We report on a 32-MHz quartz TCXO fully integrated with commercial CMOS electronics and vacuum packaged at wafer level using a low-temperature MEMS-after quartz process. The novel quartz resonator design provides for stress isolation from the CMOS substrate thereby yielding classical AT-cut f/T profiles and low hysteresis which can be compensated to < ± 0.2 ppm over temperature using on-chip third-order...
Deep UV (DUV) light-emitting diodes (LEDs) are finding increased application in many areas including water purification and sterilization. Sub-270 nm emission is ideal for these applications since bacterial DNA absorbs strongly in this wavelength regime. To extract high energy photons (∼5 eV), the LED cladding regions must be transparent and therefore consist of high Aluminum content (>60%) n-...
Deposition of InAlN on commercially purchased SiC/(111) Si wafers has been performed in a temperature range of 530°C to 420°C using an alternating precursor MOCVD growth technique. The effect of an InN buffering layer between the substrate and the InAlN layer was explored. Varying the ratio between the InN and AlN in InAlN was also explored. Peak shifting to higher angles was observed in the InN interlayer...
Dry-strip process of ion-implanted photoresist is a major challenging process due to prevent resist popping. We preheat the wafer at various temperatures in order to monitor the strip process steps between ion-implanted crust and bulk photoresist. It is found that the strip rate gets slower for low temperature, showing its high chemical reactive dependence. Temperature of wafer and optical emission...
Dry-strip process of ion-implanted photoresist is a major challenging process due to prevent resist popping. We preheat the wafer at various temperatures in order to monitor the strip process steps between ion-implanted crust and bulk photoresist. It is found that the strip rate gets slower for low temperature, showing its high chemical reactive dependence. Temperature of wafer and optical emission...
We report a newly developed sequential plasma activation bonding (SPAB) process for direct bonding between quartz glass wafers. The novel SPAB method in the present paper employed RIE N2 plasma activation followed by or instead of the O2 plasma activation before the N radical activation. Experimental results are reported and discussed with comparison with the conventional SPAB process.
This paper presents the development of a CO2 laser-based heating system to simulate fast thermal phenomena on high temperature resistant FBGs dedicated to high temperature profiles monitoring within components exposed to hot plasma inside Tokamak. We have demonstrated the reliability of two optical fiber based sensing techniques to control spatial and temporal annealing measurement during high and...
This paper reports a simple and effective method for generating a stable temperature gradient on a microfluidic plant chip. A thermo-electric cooling (TEC) plate is horizontally placed below an inclined microfluidic plant chip. The space between the TEC and the plant chip is filled with polydimethylsiloxane (PDMS). Due to different lengths of thermal pathways from the TEC to the plant chip, a stable...
A diagnostic system was setup to test the ferroelectric micro-plasma thruster(FMPT). The V-I characteristic of the FMPT was measured. The optical spectrum of microplasma generated in FMPT was obtained. Additionally, the electron temperature has been found to be ∼3.43 eV from atomic Boltzmann plots of neutral Ag I lines.
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