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SUMMARY:The polarizer and the backscatter detector of the neutron decay ex
 periment PERC
DTSTART:20260611T123000Z
DTEND:20260611T133000Z
DTSTAMP:20260615T172800Z
UID:indico-event-8030@indico.ph.tum.de
DESCRIPTION:Speakers: Lilli Löbell (TUM)\n\nThe decay of free neutrons is
  a powerful tool for precision tests of the Standard Model of particle phy
 sics. Correlation coefficients - such as the beta asymmetry $A$ and the Fi
 erz interference term $b$ - serve as input for the determination of the CK
 M matrix element $V_\\mathrm{ud}$ and for searches for (effective) scalar 
 and tensor as well as right-handed couplings.The neutron decay spectromete
 r PERC (Proton Electron Radiation Channel)\, which is set up at the resear
 ch reactor FRM II\, aims to improve the accuracy of several correlation co
 efficients by up to one order of magnitude. PERC consists of a 12 m long s
 uperconducting magnet system\, in which the neutron beam is contained by a
  non-depolarizing neutron guide. The magnetic field guides electrons and p
 rotons produced in the neutron decay towards the main detector\, which wil
 l initially be a scintillation detector with photomultiplier tube readout 
 and later be upgraded to a silicon detector. A second detector system\, wh
 ich consists of a scintillator read out by silicon photomultipliers\, is i
 nstalled in the upstream area of PERC and allows to identify backscatter e
 vents. For measurements requiring a polarized neutron beam\, an S-bender p
 olarizer will be installed in the neutron beam line in front of PERC.In th
 is talk\, I will present simulations of the polarizer and first measuremen
 ts with a backscatter detector prototype as well as the current status of 
 PERC. \n\nhttps://indico.ph.tum.de/event/8030/
LOCATION:E18/ENE Seminar Room 3268 (TUM PH)
URL:https://indico.ph.tum.de/event/8030/
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