Hannes Friederich

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Many current and future experiments require the highest temporal resolution together with large numbers of channels in the data acquisition system (DAQ) for a minimum cost. The DRS4 waveform digitizing chip allows data sampling at up to 5 Giga-samples per second (GSPS) with high amplitude resolution. The domino wave sampling method offers a significant cost(More)
A first comparison has been made between the pulse-shape discrimination characteristics of a novel He-based pressurized scintillation detector and a NE-213 liquid-scintillator reference detector using an Am/Be mixed-field neutron and gamma-ray source and a high-resolution scintillation-pulse digitizer. In particular, the capabilities of the two fast neutron(More)
The WaveDREAM data acquisition (DAQ) system, based on the DRS4 switched capacitor array waveform digitizing chip, provides Giga-samples per second (GSPS) digitization in a region of interest together with continuous sampling of the input signals at 120 Mega-samples per second (MSPS). In the Field-programmable gate array (FPGA), the 120 MSPS signal can be(More)
MODES_SNM project aimed at developing a mobile/portable modular detection system for radioactive sources and Special Nuclear Material (SNM). Its main goal was to deliver a tested prototype capable of passively detecting weak or shielded radioactive sources with accuracy higher than that of currently available systems. By the end of the project all the(More)
A neutron spectroscopic technique for plutonium content measurement is described. The technique exploits the kinematic cutoff of neutron emission in (&#x03B1;,n) reactions on oxygen. The Watt spectrum of fission neutron emission extends to higher energies without such a cutoff. <sup>4</sup>He scintillation detectors were calibrated with an energy cut to(More)
Xe sealed under pressure of 50 bar inside a titanium cylinder closed with glass windows was tested as a scintillator for &#x03B3;-ray detection. Taking advantage of Xe high atomic number of 54, high pressure Xe was used for &#x03B3;-ray spectrometry in the range between 50 keV and 1.5 MeV. Compton electron response was also measured down to 7 keV by means(More)
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