Seminario di Gruppo III INFN
Martedi' 30 Gennaio 2018
Titolo: Particle detectors for hadron physics and applications
Modern experiments in particle and nuclear
physics often rely on detection equipment that is
custom designed for optimum performance within a
given physics scope. Designed components
include everything from detector materials to
readout electronics. While many components are
commercially available, careful assessment of the
physics is required to identify
hardware parts where R&D efforts potentially pay off most in the overall detector performance with respect to the key physics features of an experiment.
Examples for a number of detector setups will be presented where R&D efforts are ongoing or have been applied to upgrades of existing detector arrays in order to meet modern standards for readout, radiation hardness etc.. This involves both charged particle tracking as well as electromagnetic calorimetry, e.g. in the CBELSA/TAPS setup and the PANDA installation at FAIR.
Generic research on novel detectors and spin-offs towards applications will be touched in passing.
Seminario di Fenomenologia delle Particelle Elementari INFN
Mercoledi' 7 Febbraio 2018
Titolo: The electron capture in 163Ho experiment - ECHo and discussion of the recent results
Direct determination of the electron neutrino and
anti-neutrino mass can be obtained by the analysis
of electron capture and beta spectra respectively.
In the last years, experiments analyzing the 3H beta
spectrum reached a limit on the electron
antineutrino mass of 2 eV. The upper limit on the
electron neutrino mass m(𝜈𝑒)
is still two orders of magnitudes higher, at 225 eV.
The Electron Capture in 163Ho experiment, ECHo, is
designed to investigate m(𝜈𝑒)
in the sub-eV region and reach the same sensitivity
as foreseen for electron antineutrino mass in new
In ECHo, high sensitivity on a finite m(𝜈𝑒) will be reached by the analysis of the endpoint region in high statistics and high resolution calorimetrically measured 163Ho spectra. To perform this experiment, high purity 163Ho source will be enclosed in a large number of low temperature metallic magnetic micro-calorimeters which are readout using the microwave multiplexing technique. This approach allows for a very good energy resolution, below Δ𝐸FWHM < 5 eV and for a fast time resolution well below 1 𝜇s.
Thanks to the modular approach, the ECHo experiment is designed to be stepwise up-graded. The first on-going phase, ECHo-1k, is characterized by a 163Ho activity of about 1 kBq enclosed in about 100 pixels. The statistics of 1010 events in the 163Ho spectrum will allow for improving the limit on m(𝜈𝑒) by more than one order of magnitude.
In this talk, the present status of the ECHo-1k experiment will be discussed as well as the plans for the next phases.
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Segreteria Scientifica INFN
Sezione di Genova