Application of COMSOL API for autonomous modeling of thin film resonator
In this paper the features of automated systems modeling microsensors were discusses. Based on Comsol API subsystem for modeling and analysis of thin film resonator was developed.
The analysis of the electronic devices substrates roughness testing methods
В статье проведен анализ основных параметров подложек электронной техники, влияющих на качество конечного изделия. В частности, рассмотрена шероховатость поверхности. Выполнено исследование методов контроля шероховатости, выявлены их преимущества и недостатки. Определены перспективные задачи по созданию автоматизированных систем контроля качества поверхности подложек, в частности таких, которые будут разрабатываться на основе оптических методов.
Effects of reservoir volume on performance of pulse tube cooler.
A pulse tube cooler has the advantages of long-life and low-vibration over conventional cryocoolers such as G-M and Stirling coolers because of the absence of moving parts at low temperature. On the other hand, the combination of a reservoir and orifice is indispensable to optimize the performance of pulse tube coolers. In order to make the pulse tube cooler compact for practical applications, the volume of reservoir should be minimized. This paper analyzes the effects of the reservoir volume on the thermodynamic performance of various components in a simple orifice and a double-inlet pulse tube cooler by combining a linearized model with a thermodynamic analysis. Expressions of entropy production for those components are presented. The results show that the reservoir volume has a significant influence on the entropy production in the various components when the reservoir to pulse tube volume ratio is smaller than about 5. The ratio is important to determine the minimum reservoir volume for a pulse tube cooler. Optimum settings for a double-inlet pulse tube cooler are also discussed.