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We report on the novel, single photon counting, large area X-Ray camera called HyPix-3000 for in-house XRD. Its active area is 77.5 mm × 38.5 mm (approx. 3000 mm2) and it consists of 298,375 square-shaped pixels of the 100 µm pitch, each of which contains charge sensitive amplifier, shaper and two discriminators followed by two independent 16-bit long counters. It can operate in ultra-high dynamic...
The simulation results of the timing properties of a plastic scintillator are reported, when it is read by the WLS fiber. For the sake of completeness, we are beforehand with a simplified formula describing the light propagation in a fiber, and thereafter present the simulation results as the distributions for t1-t0 as well as t1+t2 to see the time resolution with t1 and t2 the times appeared at both...
The light yield (LY) of a wavelength shifter (WLS) fiber embedded in a plastic scintillator plate was studied by the MC simulation using the Mathematica package to find its optimum length and fiber density in the shashlik mode. It was identified whether or not the light absorbed in a fiber has been once reflected at any surface. The partial LY with reflections at upper and lower surfaces as well as...
We analyze the spectra measured by the Gamma Ray Spectrometer (GRS) on board the SELENE satellite orbiting the Moon. The spectra consist in 8192 energy channels ranging from 0 to 12 MeV and exhibiting lines of interest (O, Mg, Al, Si, Ti, Ca, Fe, K, Th, and U) superposed on a continuum. We have also analysed the data with various multivariate techniques, one of them being the Independent Component...
High track-density recording and multi-layer recording have been investigated for large capacity optical recording discs. In this case, the recorded data will be reproduced under the low signal-to-noise ratio (SNR) condition due to crosstalk from the adjacent tracks or the other layers, and robust data detection will be required. In this paper, a novel matched spectral-null (MSN) code providing the...
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