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SUMMARY:[NAPP Seminar] Cosmic Background Neutrino Decay Search - COBAND ex
 periment
DTSTART;VALUE=DATE-TIME:20170428T070000Z
DTEND;VALUE=DATE-TIME:20170428T080000Z
DTSTAMP;VALUE=DATE-TIME:20261114T202245Z
UID:indico-event-6@sshep.snu.ac.kr
DESCRIPTION:*Speaker : Prof. Shinhong Kim (University of Tsukuba)\n\n*Abs
 tract : We present the status of the COsmic BAckground Neutrino Decay sear
 ch(COBAND) experiment and the development of Superconducting Tunnel Juncti
 on (STJ) detector with the cryogenic preamplifier as a far-infrared single
  photon detector for the COBAND experiment. The photon energy spectrum fro
 m the radiative decay of cosmic background neutrino is expected to have a 
 sharp cutoff at high energy end in a far-infrared region ranging from 15me
 V to 30meV. The detector is required to measure an individual photon energ
 y with a sufficient energy resolution less than 2% for identifying the cut
 off structure\, and to be designed for a rocket or satellite experiment.\n
 \n    We develop a combination of the diffraction grating and the array
  of Nb/Al-STJ pixels\, where each Nb/Al-STJ pixel can detect a single far-
 infrared photon delivered by the grating. An amplifier is required to have
  a level of 10 electron equivalent-noise for Nb/Al-STJ. To achieve high si
 gnal-to-noise ratio of the STJ\, we use a preamplifier made with the Silic
 on on Insulator (SOI) technique that can be operated at low temperature ar
 ound 0.3K.\n\n   We also develop Hf-STJ as a micro-calorimeter which is 
 planned to be used in the future satellite experiment. The present status 
 of the development of the STJ detector development is reported in more det
 ail.\n\n \n\nhttps://sshep.snu.ac.kr/event/6/
LOCATION:B23 317
URL:https://sshep.snu.ac.kr/event/6/
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