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SUMMARY:Direct neutrino mass determination with the KATRIN experiment - Dr
  Philipp Chung-On Ranitzsch
DTSTART:20171024T140000Z
DTEND:20171024T150000Z
UID:TALK73541@talks.cam.ac.uk
CONTACT:Lorena Escudero
DESCRIPTION:Neutrinos are popularly known as “ghost particles”\, but t
 he particle\nphysics community has been hard at work in the last decades t
 o get\nmore information on the properties of neutrinos. The discovery of n
 eutrino oscillations proofed that neutrinos are in fact massive particles.
 \nNonetheless the absolute mass scale is not known yet.\n\nThe goal of the
  KArlsruhe TRItium Neutrino experiment (KATRIN)\nis to investigate the neu
 trino mass with a sensitivity of\n0.2 eV/c2 by a high-resolution and high-
 statistics measurement of\nthe end-point region of the 3H 𝛽-spectrum. T
 he 𝛽-electrons start\nin the windowless gaseous tritium source and go i
 nto a differential\nand a cryogenic pumping section. These components magn
 etically\nguide the 𝛽-electrons\, while reducing the 3H flow to a negli
 gible level.\nThe energy of the 𝛽-electrons is then analyzed by two ele
 ctrostatic\nspectrometers based on the MAC-E filter technique and detected
  by\na multi-pixel silicon semiconductor detector.\n\nAt the experimental 
 site at the Karlsruhe Institute of Technology\n(KIT)\, all major component
 s have arrived by summer 2015 and the\ncomplete beam line has been assembl
 ed. The commissioning efforts\nof the full beam line and of the main spect
 rometer alone have been\nongoing since 2013. During the latest measurement
  phase in July 2017\nthe full beam line was operated with a radioactive so
 urce gas for the\nfirst time. The used 83mKr emits mono-energetic conversi
 on electrons\nwith energies up to 32 keV and was used for detailed studies
  of the\nwhole KATRIN setup.\n\nThis talk gives an overview of the current
  status of the KATRIN\nexperiment\, the recent commissioning efforts and t
 he upcoming steps\ntowards the first tritium measurements planned for 2018
 .
LOCATION:Ryle Seminar Room (Rutherford 930) 
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