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SUMMARY:Progress of upgrading alpha-ray imaging detector in low radioactiv
 ity background
DTSTART;VALUE=DATE-TIME:20210830T171500Z
DTEND;VALUE=DATE-TIME:20210830T173000Z
DTSTAMP;VALUE=DATE-TIME:20260518T061831Z
UID:indico-contribution-15840@indico.ific.uv.es
DESCRIPTION:Speakers: Hiroshi Ito (Tokyo University of Tokyo)\nWe have bee
 n developing an alpha-ray detector based on a time-projection-chamber in a
  low radioactivity background\, in order to image the radioisotope concent
 ration on the material surface. In underground particle physics\, current 
 detectors are required massive volume of target using ultra-pure material 
 without radioactive impurities. However\, uranium or thorium impurities on
  the surface of the detector could be reduced fiducial volume and produced
  background source via emanation radon. In last conference\, we provided t
 he alpha-ray imaging detector with a sensitivity of a few $10^{-3}$ $\\alp
 ha$/cm$^2$/hr in 10cm $\\times$ 10cm of effective sample area. In this wor
 k\, we performed to improve the sensitivity\, and we would present a curre
 nt status of the upgrading alpha-ray imaging detector.\n\nhttps://indico.i
 fic.uv.es/event/6178/contributions/15840/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15840/
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