3,402 research outputs found
The DArk Matter Particle Explorer mission
The DArk Matter Particle Explorer (DAMPE), one of the four scientific space
science missions within the framework of the Strategic Pioneer Program on Space
Science of the Chinese Academy of Sciences, is a general purpose high energy
cosmic-ray and gamma-ray observatory, which was successfully launched on
December 17th, 2015 from the Jiuquan Satellite Launch Center. The DAMPE
scientific objectives include the study of galactic cosmic rays up to
TeV and hundreds of TeV for electrons/gammas and nuclei respectively, and the
search for dark matter signatures in their spectra. In this paper we illustrate
the layout of the DAMPE instrument, and discuss the results of beam tests and
calibrations performed on ground. Finally we present the expected performance
in space and give an overview of the mission key scientific goals.Comment: 45 pages, including 29 figures and 6 tables. Published in Astropart.
Phy
Validation of a new data-analysis software for multiple-peak analysis of Îł spectra at ISIS pulsed Neutron and Muon Source
© 2019 Elsevier B.V. In this work, we present a multi-peak fitting code in order to establish a new protocol for the analysis of Îł spectra at ISIS pulsed Neutron and Muon Source. The protocol, relying on the ROOT framework developed at CERN, has been tailored for the analysis of two specific gamma emitters â 241Am and 133Ba â and its results have been compared to those generated by Hypermet PC, a dedicated software package specifically devoted to the analysis of neutron induced Îł-ray spectra and of widespread use since late 1990s. This new fitting procedure is scheduled for integration into the software for time-resolved prompt-gamma activation analysis, T-PGAA, currently under development at ISIS. T-PGAA allows for the simultaneous acquisition of photon energy and neutron time of flight, respectively, when prompt gamma rays are emitted by a sample after neutron absorption, essentially combining neutron resonance capture analysis (NRCA) and prompt gamma activation analysis (PGAA)
The Antares Collaboration : Contributions to the 34th International Cosmic Ray Conference (ICRC 2015, The Hague)
The ANTARES detector, completed in 2008, is the largest neutrino telescope in the Northern hemisphere. Located at a depth of 2.5 km in the Mediterranean Sea, 40 km off the Toulon shore, its main goal is the search for astrophysical high energy neutrinos. In this paper we collect the 21 contributions of the ANTARES collaboration to the 34th International Cosmic Ray Conference (ICRC 2015). The scientific output is very rich and the contributions included in these proceedings cover the main physics results, ranging from steady point sources, diffuse searches, multi-messenger analyses to exotic physics
Performance comparison between signal digitizers and low-cost digital oscilloscopes: spectroscopic, pulse shape discrimination and timing capabilities for nuclear detectors
Signal digitizers revolutionized the approach to the electronics readout of
radiation detectors in Nuclear Physics. These highly specialized pieces of
equipment are designed to acquire the signals that are characteristic of the
detectors in nuclear physics experiments. The functions of the several modules
that were once needed for signal acquisition, can now be substituted by a
single digitizer. As suggested by the name, with such readout modules, signals
are first digitized (i.e. the signal waveform is sampled and converted to a
digital representation) and then either stored or analyzed on-the-fly. The
performances can be comparable or better than the traditional analog
counterparts, in terms of energy, time resolution, and acquisition rate.
In this work, we investigate the use of general-purpose digital oscilloscopes
as signal digitizers for nuclear detectors. In order to have a proper
comparison, we employ a distributed data acquisition system (DAQ), that
standardizes the interface between the hardware and the on-line data analysis.
The signals, from a set of typical radiation detectors, are digitized and
analyzed with the very same algorithms in order to avoid biases due to
different software analysis. We compare two traditional signal digitizers (CAEN
DT5725 and CAEN DT5751) to two low-cost digital oscilloscopes (Digilent Analog
Discovery 2, and Red Pitaya STEMLab 125-14), in terms of their capabilities for
spectroscopy (energy resolution), time resolution, pulse shape discrimination,
and maximum acquisition rate.Comment: 17 pages, 8 figures, 4 tables, Prepared for submission to JINS
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