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SUMMARY:UCN source with superfluid helium at WWR-M reactor
DTSTART;VALUE=DATE-TIME:20161014T121500Z
DTEND;VALUE=DATE-TIME:20161014T124500Z
DTSTAMP;VALUE=DATE-TIME:20260720T010718Z
UID:indico-contribution-604@cern.ch
DESCRIPTION:Speakers: Vitaliy Lyamkin (PNPI NRC KI)\nThe WWR-M reactor at 
 PNPI is going to be equipped with a high density ultracold neutron source.
  Method of UCN production is based on their accumulation in the super flui
 d helium due to particular qualities of that quantum liquid. High density 
 of UCN will be achieved by putting source directly into the thermal column
  of the WWR-M reactor\, where the thermal neutron flux reaches 3.2 e 12 n/
 cm^2s. The cold neutron (9 Angstrom) flux will be dF/dlambda (9 Angstrom)=
  3.2e10 n /cm^2sAngstrom. Neutron fluxes and heat load in UCN source were 
 calculated by using MCNP program. The main technical problem here is the t
 otal heat load (P= 19 W) on superfluid helium. To solve this problem a ful
 l-scale model of the UCN source that simulates heat inflows from the react
 or has been created and launched. Early experiments showed the possibility
  of removing 15W heat from 1.3 K superfluid helium. Our source aims at obt
 aining a density of UCN up to 10000 n/cm^3\, 100 greater then in existing 
 sources presently available in the world. Increase in the density of UCN w
 ill raise the accuracy of the measurement of the neutron electric dipole m
 oment\, neutron lifetime etc.\n\nhttps://indico.particle.mephi.ru/event/4/
 contributions/604/
LOCATION:Milan Hotel Hall of the 2nd floor
URL:https://indico.particle.mephi.ru/event/4/contributions/604/
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