The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We present recent developments of our phonon and photon detections using Lumped Element Kinetic Inductance Detectors (LEKIDs). Photons or phonons incident on super-conducting material break Copper-pairs and change its kinetic inductance. If the superconductor is in a form of a resonator, the resonant frequency shifts depending on the deposited energy of the incident phonon or photon. We have been...
Energy beam position monitors (EBPM) based on grounded co-planar waveguide (CPW) transmission lines have been designed for installation in the dispersive sections of the bunch compressor chicanes at the future European X-ray Free Electron Laser research facility (XFEL) located in Germany [1]. After completion, the European XFEL will generate extremely intense X-ray flashes with the properties of laser...
Non-coaxial laser detecting system detection performance was closely related to the detecting field, which was depended on the angle parameters of the system. In order to develop the detection performance and make full use of laser energy, the test system of non-coaxial laser detecting field was designed. Built the mathematical models of working zone distance and drew the curves of the working zone...
Underground construction projects require accurate techniques for machine guidance control. This paper presents an advanced design of a fully integrated active laser target (ALT), which is employed as an optical displacement and orientation sensor. The instrument is mounted on a tunnel boring machine (TBM) and delivers the TBM's pitch and yaw angles to a remote host system. The optical arrangement...
A simple laser diode, without lenses, is demonstrated as a flow sensor. The diode is placed directly on the edge of the duct, exploiting the natural laser divergence. The flow-measurement is based on the Doppler shift induced by the scattering particles inside the fluid, read by the self-mixing effect inside the laser diode. The proposed approach was modeled by a numerical simulation, in order to...
The purpose of this work is to develop an optical distance sensor of reduced size and very-low power consumption to be used on a measuring system for characterizing steel pipes. The work led to the construction of a working prototype configured as an active triangulation rangefinder with a gamut of 10 cm starting at 5 cm. The experimental measurements have confirmed the feasibility of this new lightweight...
This paper presents a non-contact reflected-spot method (RSM) for estimating the radius of curvature (ROC) of smooth samples. The size of the laser spot reflected by the sample was used as the basis from which to calculate the ROC. A geometric model of the proposed RSM system was fabricated and experimental results demonstrated the efficacy of this approach in measuring the ROC of convex-plano lenses...
A confocal displacement sensor with a varifocal lens and a multi-wavelength rainbow laser was established in this study. The surface curvature of varifocal lens was varied by different current driving so that the focal length can be easily changed. Thus, we can quickly measure the distance between the sensor head and targets by detecting the reflective power according to the principle of confocal...
Novel safety systems are needed to meet the growing demand of railway operation. In this paper we introduce general techniques for the detection of tracks and their components in 3D laser scanning data. These techniques make use of feature based methods, such as support vector machines, as well as model based methods, such as template matching. The focus of this work are robust and precise detectors...
We present the development of Superconducting Tunnel Junction (STJ) detectors as a far-infrared single photon spectrometer, which is motivated for an application to a search for the radiative decay of the cosmic neutrino background (CνB). The photon energy spectrum from the radiative decays of CνB is expected to have a sharp edge at high energy end in a far-infrared region ranging from 14 meV to 25...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.