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In the last half decade LED technology has undoubtedly made its most rapid progresses leading to an enormous growth of illumination applications. Though, this advancement is based on a series of quantum steps in improvement of efficiency, removal of the remaining power loss is a major concern in further developments. In our paper we compare LED demonstrator(More)
By using more powerful LEDs a good thermal management is becoming more and more important. Here usually the thermal interconnects have to be in focus. Therefore a simple and rapid measurement method for the thermal check of the solder joint in a high volume production is necessary. A standard thermal resistance measurement is very time consuming due to the(More)
We present a new technique of direct measurement of wire tensions in wire chambers. A specially designed circuit plucks the wire using the Lorentz force and measures the frequency of damped transverse oscillations of the wire. The technique avoids the usual time-consuming necessity of tuning circuit parameter to a resonance. It allows a fast and convenient(More)
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