Optimization of metallic magnetic calorimeters with embedded 163Ho
Creators
- 1. Kirchhoff-Institut fuer Physik, Heidelberg (Germany)
- 2. Johannes Gutenberg-Universitaet, Mainz (Germany)
- 3. Physics Department CERN, Geneva (Switzerland)
- 4. Institut Laue-Langevin, Grenoble (France)
- 5. Laboratory of Radiochemistry and Environmental Chemistry, Paul Scherrer Institut, Villigen (Switzerland)
Description
The Electron Capture in 163Ho (ECHo) collaboration plans to reach sub-eV sensitivity on the electron neutrino mass by the analysis of high statistics of 163Ho electron capture spectra. Large arrays of metallic magnetic calorimeters (MMCs) with enclosed 163Ho read out using microwave SQUID multiplexing will be used for the measurement of the spectrum. With first prototypes of MMCs having the 163Ho source ion-implanted in the absorbers, operated at 25 mK, an energy resolution ΔEFWHM=7.6 eV and a signal rise time τ=130 ns have been achieved, paving the way to the first stage of the experiment (ECHo 1k). We present the optimization of MMCs and of the methods to embed the high purity 163Ho source in detector absorbers. In particular we discuss how to define the optimal activity per pixel considering the limits coming from the allowed unresolved pileup fraction and from the additional contribution of detector heat capacity related to the magnetic moments of 163Ho.
Additional details
Identifiers
Publishing Information
- Journal Title
- Verhandlungen der Deutschen Physikalischen Gesellschaft
- Journal Issue
- Hamburg 2016 issue
- Series
- Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 51(2)
- Journal Page Range
- [1 p.]
- ISSN
- 0420-0195
- CODEN
- VDPEAZ
Conference
- Title
- DPG-Fruehjahrstagung 2016 (Spring meeting) of the section matter and cosmos (SMuK) together with the divisions gravity and relativity, radiation and medical physics, particle physics, theoretical and mathematical physics, and the working group philosophy of physics
- Original Conference Title
- DPG-Fruehjahrstagung 2016 der Sektion Materie und Kosmos (SMuK) gemeinsam mit den Fachverbaenden Gravitation und Relativitaetstheorie, Strahlen- und Medizinphysik, Teilchenphysik, Theoretische und Mathematische Grundlagen der Physik sowie der Arbeitsgruppe Philosophie der Physik
- Dates
- 29 Feb - 4 Mar 2016
- Place
- Hamburg (Germany)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 48053711
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CALORIMETERS; CRYOGENICS; ELECTRON CAPTURE DECAY; ENERGY RESOLUTION; HOLMIUM 163; HOLMIUM ADDITIONS; HOLMIUM IONS; ION IMPLANTATION; MAGNETIC DIPOLE MOMENTS; MAGNETIC MATERIALS; MAGNETIC SPECIFIC HEAT; METALS; NUCLEAR MAGNETIC MOMENTS; OPTIMIZATION; POSITION SENSITIVE DETECTORS; PULSE PILEUP; TEMPERATURE RANGE 0000-0013 K; X-RAY DETECTION; X-RAY SPECTROSCOPY
- Descriptors DEC
- ALLOYS; BETA DECAY; BETA DECAY RADIOISOTOPES; CHARGED PARTICLES; DECAY; DETECTION; DIPOLE MOMENTS; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTS; HOLMIUM ALLOYS; HOLMIUM ISOTOPES; INTERMEDIATE MASS NUCLEI; IONS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MAGNETIC MOMENTS; MATERIALS; MEASURING INSTRUMENTS; NUCLEAR DECAY; NUCLEAR PROPERTIES; NUCLEI; ODD-EVEN NUCLEI; PHYSICAL PROPERTIES; RADIATION DETECTION; RADIATION DETECTORS; RADIOISOTOPES; RARE EARTH ADDITIONS; RARE EARTH ALLOYS; RARE EARTH NUCLEI; RESOLUTION; SECONDS LIVING RADIOISOTOPES; SPECIFIC HEAT; SPECTROSCOPY; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- Session: T 92.9 Do 18:50 and TT 19.53 Mo 15:00; No further information available