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SUMMARY:163Ho implantation in TES-based micro-calorimeters for the HOLMES 
 experiment.
DTSTART;VALUE=DATE-TIME:20230908T102000Z
DTEND;VALUE=DATE-TIME:20230908T104000Z
DTSTAMP;VALUE=DATE-TIME:20260611T004046Z
UID:indico-contribution-541-3190@indico.tlabs.ac.za
DESCRIPTION:Speakers: Matteo De Gerone (INFN Genova)\nThe HOLMES experimen
 t aims to directly measure the ν mass studying the 163Ho electron capture
  decay spectrum\, developing arrays of TES-based micro-calorimeters implan
 ted with O(102 Bq/detector) $^{163}$Ho atoms. \nThe $^{163}$Ho embedding i
 nside detectors is a crucial step of the experiment. Because $^{163}$Ho is
  produced by neutron irradiation of a $^{162}$Er sample\, the source must 
 be separated from a lot of contaminants. A chemical process removes every 
 species other than Ho\, but it is not sufficient to remove all background 
 sources: in particular\, $^{166m}$Ho beta decay can produce fake signal in
  the region of interest. For this reason a dedicated implantation / beam a
 nalysis system has been set up and commissioned in Genoa’s laboratory. I
 t is designed to achieve more than 5σ separation @163/166 a.m.u. simultan
 eously allowing an efficient Ho atoms embedding in the absorbers. The mach
 ine performances in terms of achievable current\, beam profile and mass se
 paration have been studied with MonteCarlo simulations and evaluated by me
 ans of calibration runs using Cu\, Mo\,  Au and 165Ho beams. In this work\
 , the commissioning of the machine and the production of the first set of 
 low activity (O(1Bq/detector)) implanted TES will be described.\n\nhttps:/
 /indico.tlabs.ac.za/event/112/contributions/3190/
LOCATION: Meeting Room 2.61 - 2.63
URL:https://indico.tlabs.ac.za/event/112/contributions/3190/
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SUMMARY:New scintillation strip design for the DANSS detector upgrade
DTSTART;VALUE=DATE-TIME:20230908T100000Z
DTEND;VALUE=DATE-TIME:20230908T102000Z
DTSTAMP;VALUE=DATE-TIME:20260611T004046Z
UID:indico-contribution-541-2766@indico.tlabs.ac.za
DESCRIPTION:Speakers: Dmitry Svirida (Lebedev Physics Institute of RAS)\nD
 ANSS detector at Kalininskaya nuclear power plant demonstrates excellent p
 erformance in antineutrino detection. Counting rates of up to 5000 events 
 per day made it possible to record more than 6.5 million antineutrino even
 ts in 6 years of remarkably stable operation. The data sample is extremely
  clean and features the signal to background ratio in excess of 50. Yet on
 ly moderate energy resolution of 34% at 1 MeV limits the sensitivity of th
 e experiment for the sterile neutrino searches. \nThe upgrade of the detec
 tor is aimed at more than twice better energy resolution of 12% at 1 MeV. 
 Besides that the sensitive volume is planned to be increased by 70% inside
  the same shielded space on the lifting platform\, leading to almost twice
  higher the counting rate. New scintillation strips feature much better un
 iformity of the light collection. Readout from both strip edges provides i
 nformation on the longitudinal event coordinate. The talk will address the
  details and the status of the upgrade together with the latest results of
  beam tests. The expected influence of the improvements on the sensitivity
  to the sterile neutrino will also be discussed.\n\nhttps://indico.tlabs.a
 c.za/event/112/contributions/2766/
LOCATION: Meeting Room 2.61 - 2.63
URL:https://indico.tlabs.ac.za/event/112/contributions/2766/
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