The status of the HOLMES experiment
- Creators
- Origo L.
- Alpert B.
- Balata M.
- Becker D.
- Bennett D.
- Bevilacqua A.
- Borghesi M.
- Celasco E.
- Cerboni N.
- Ceruti G.
- De Gerone M.
- Dressler R.
- Faverzani M.
- Ferri E.
- Fowler J.
- Gallucci G.
- Gard J.
- Gatti F.
- Giachero A.
- Hilton G.
- Koster U.
- Labranca D.
- Lusignoli M.
- Mates J.
- Maugeri E.
- Moretti R.
- Nisi S.
- Nucciotti A.
- Parodi L.
- Pessina G.
- Ragazzi S.
- Reintsema C.
- Schmidt D.
- Schumann D.
- Siccardi F.
- Swetz D.
- Ullom J.
- Vale L.
- Others:
- Origo, L.
- Alpert, B.
- Balata, M.
- Becker, D.
- Bennett, D.
- Bevilacqua, A.
- Borghesi, M.
- Celasco, E.
- Cerboni, N.
- Ceruti, G.
- De Gerone, M.
- Dressler, R.
- Faverzani, M.
- Ferri, E.
- Fowler, J.
- Gallucci, G.
- Gard, J.
- Gatti, F.
- Giachero, A.
- Hilton, G.
- Koster, U.
- Labranca, D.
- Lusignoli, M.
- Mates, J.
- Maugeri, E.
- Moretti, R.
- Nisi, S.
- Nucciotti, A.
- Parodi, L.
- Pessina, G.
- Ragazzi, S.
- Reintsema, C.
- Schmidt, D.
- Schumann, D.
- Siccardi, F.
- Swetz, D.
- Ullom, J.
- Vale, L.
Description
This work summarizes the current status of HOLMES, a calorimetric experiment for the direct neutrino mass measurement. The state-of-the-art in this field is represented by the KATRIN spectrometer that is under data-taking aiming at a sensitivity of 0.2 eV. HOLMES will prove the feasibility of the calorimetric approach, that is an alternative method to the spectrometric one. HOLMES detectors are Transition Edge Sensors in which a source of 163Ho will be ion-implanted. These microcalorimeters allow a multiplexed readout and ensure high energy and time resolutions. 163Ho is an interesting candidate for the direct neutrino mass determination. In fact, the low Q-value (∼2.83 keV) of its electron capture decay increases the fraction of useful events in the region close to the end-point. HOLMES will assess mν by analyzing the spectrum deformation due to a non-zero mν. This contribution describes the detector working principles, their fabrication for HOLMES and their characterization. At the same time, a focus on the ion-implantation is given together with the latest results from its tests. HOLMES is now close to the first low-dose measurement. By implanting a small 163Ho activity per detector it will be possible to fine-tune the entire experimental procedure and also to analyze a preliminary spectrum in order to assess an initial upper limit on mν of about ∼ 10 eV.
Additional details
- URL
- https://hdl.handle.net/11567/1141918
- URN
- urn:oai:iris.unige.it:11567/1141918
- Origin repository
- UNIGE