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Nowadays almost all radio astronomical data is processed digitally. Digital signal process, as compared with analogue technique, has big advantages. Once the data are properly sampled and digitized and stored, the information will be kept. One could always go back to the stored data and re-process the data to obtain the desired information. But the ADC will unavoidably deteriorate the quality of the...
We investigate the influence of additional dc current on response of CMOS THz detectors. A resistive self-mixing model calculation, shows that the voltage response of CMOS detectors increases significantly by applying a small dc current on the drain side of CMOS device. The calculation results are further verified by the experimental data from CMOS detectors at 0.65THz. The maximum voltage response...
Studies have been done and continue on the design and construction of a Shashlik detector using Radiation hard quartz capillaries filled with wavelength shifting liquid to collect the scintillation light from LYSO crystals for use as a calorimeter in the Phase II CMS upgrade at CERN. The work presented here focuses on the studies of the capillaries and liquids that would best suit the purpose of the...
Human action recognition has lots of real-world applications, such as natural user interface, virtual reality, intelligent surveillance, and gaming. However, it is still a very challenging problem. In action recognition using the visible light videos, the spatiotemporal interest point (STIP) based features are widely used with good performance. Recently, with the advance of depth imaging technology,...
A method for the location of a far-field thermal neutron source using an array of eighteen 2 × 2 × 1.5 cm3 position-sensitive CdZnTe detectors has been proposed. The relative intensity of 558 keV 113Cd capture γ rays emitted from the outward-facing surfaces of each detector in the array was estimated via Compton imaging. The detector response to thermal neutrons was simulated using Geant4 and stored...
By leveraging on the wealth of Si-CMOS technology know-how and the largely available infrastructures, the fundamental photonic device building blocks and circuit integration platform, essential for the realization of the electronic-photonic integrated circuit (EPIC), have been successfully developed. This presentation gives an overview on the current status of this critical technology and provides...
Large volume, pixelated Cadmium Zinc Telluride detectors have been developed over the past decade. In November of 2009, Redlen Technologies began manufacturing 130 20×20×15 mm3 CdZnTe detectors, each with a common grid between the 121 pixels, for the Polaris Project. Results for the first 65 detectors were studied to determine a set of criteria that could be used to help streamline the detector testing...
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