BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Direct neutrino mass measurement with HOLMES
DTSTART:20260507T120000Z
DTEND:20260507T130000Z
DTSTAMP:20260508T000000Z
UID:indico-event-5620@indico.kit.edu
CONTACT:timo.muscheid@kit.edu
DESCRIPTION:Speakers: Sara Gamba\n\nSara Gamba is doctoral student at Dipa
 rtimento di Fisica\, Università di Milano-Bicocca & Istituto Nazionale di
  Fisica Nucleare (INFN)\, Sezione di Milano Bicocca\, Milano\, Italy. She
  works for the neutrino mass experiment HOLMES and is currently as visitin
 g scientist at IPE.\nThe HOLMES experiment aims to measure the absolute ma
 ss of neutrinos with sub-eV sensitivity using low temperature microcalorim
 eters (TES) embedded with 163Ho\, thus performing a calorimetric measureme
 nt. HOLMES will proceed in multiple phases. The first one marked a fundame
 ntal milestone for the overall project. Holmium was successfully implanted
  inside an array of 64 detectors\, representing the first prototype of the
  final building block of the detector system. The embedded detectors\, rea
 d out using the microwave multiplexing technique\, performed remarkably we
 ll. The total activity was approximately 15 Bq\, corresponding to about 0.
 5 ng of 163Ho. During the two physics runs\, lasting two months\, a high-s
 tatistics calorimetric spectrum of 163Ho was measured. Data-taking periods
  lasted between two and five consecutive days\, with a duty cycle of 82% a
 nd a discarded event rate of less than 1%. In my presentation\, I will rep
 ort the results of the analysis of the data collected so far\, which has l
 ed to the first neutrino mass limit of 27 eV at a 90% credible interval. 
 The next stage of the project\, called HOLMES+\, aims to push the sensitiv
 ity frontier by scaling up detector arrays\, optimizing readout techniques
  and implantation efficiency. The goal of HOLMES+ is to develop and test a
  new small prototype array of TESs with low Tc\, implanted with high-activ
 ity 163Ho\, reaching up to 30 Bq per detector. A novel readout system base
 d on the new KICS chip will be fabricated and tested\, alongside a state-o
 f-the-art DAQ system based on RFSoC technology. Both of these upgrades wil
 l increase the bandwidth per channel and reduce readout costs by more than
  one order of magnitude. HOLMES+ will thus serve as a step toward the deve
 lopment of the final module for a final large scale Ho-based experiment wi
 th sensitivities of the order of O(50) meV.\n\nhttps://indico.kit.edu/even
 t/5620/
LOCATION:Seminarraum EG + zoom (IPE)
URL:https://indico.kit.edu/event/5620/
END:VEVENT
END:VCALENDAR