1,721,662 research outputs found
Status of the new AGATA digitizer
No full textTechnical details in white paper: "DIGI-OPT12: 12-channel 14/16-bit 100/125-MS/s Digitizer with Optical Output for AGATA/GALILEO
Status of the new AGATA digitizer
No full textTechnical details in white paper "DIGI-OPT12: 12-channel 14/16-bit 100/125-MS/s Digitizer with Optical Output for AGATA/GALILEO", available on request
Status of the AGATA preamplifiers
No full textTechnical details in white paper "AGATA Hybrid Preamplifiers with Pulser"
Status of the AGATA preamplifiers
No full textTechnical details in white paper: "AGATA Hybrid Preamplifiers with Pulser", available on reques
The "switch off" baseline restorer for the 120 channel silicon detector system for EXAFS at NSLS
No full textA new circuit for high precision baseline restoration in multichannel nuclear pulse spectrometers is proposed. It has been designed for the 120 channel silicon detector system for EXAFS research at NSLS (National Synchrotron Light Source), Brookhaven National Laboratory, USA [L.R. Furenlid et al., Nucl. Instr. and Meth. A 319 (1992) 408], and is based on a current "switch off" mechanism self-triggered on the input signal pulses. No auxiliary gate signals are required, and, consequently, the network is particularly compact. As opposed to Robinson restorers, this restorer is not affected by undershoot, and it does not involve the significant complexity of gated solutions. The restorer has been tested with a 7 pole quasi-Gaussian filter permitting very high resolution X-ray spectroscopy (160 eV FWHM on pulser peak). The signal-to-noise degradation due to the restorer is about 7%. The BLR response to 18 μs large trapezoidal input pulses shows an undershoot which is about 0.3%. Baseline is correctly recovered for repetition rates of up to 5 × 104 trapezoidal signals/s, which corresponds to a duty cycle of 60%. The BLR has been layed out in SMT on a 0.8 in. × 0.8 in. area, which is suitable for multichannel applications where the circuit has to be largely used as the last stage of each individual unipolar shaping filter
Impact of non-white noises in pulse amplitude measurements : a time-domain approach
No full textThe contribution of the 1/f-noise to the spectral line broadening in pulse amplitude measurements is derived with a time-domain analysis. The known time-domain relationships which provide the contributions of the series and parallel white noises are generalised for the case of 1/f and other typical non-white noises, by using the fractional derivative of either the system impulse response (time-invariant linear filters) or its weight function folded (time-variant linear filters). It is shown that a time-domain approach is also effective to determine the contribution of Lorentzian noises. A simple rule suitable to derive numerically the fractional derivative is given, which permits to calculate the effect of non-white noises even when the filter impulse response is not known analytically but only in sampled form. © 1998 Elsevier Science B.V. All rights reserved
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