Open AccessУстановка для измерения времени жизни нейтрона с большой гравитационной ловушкой при низкой температуре
Author(s) -
А.П. Серебров,
Е.А. Коломенский,
А.К. Фомин,
А.О. Коптюхов,
И.А. Краснощекова,
А.В. Васильев,
Д.М. Прудников,
И.В. Шока,
А.В. Чечкин,
М.Е. Чайковский,
В.Е. Варламов,
С.Н. Иванов,
А.Н. Пирожков,
P. Geltenbort,
O. Zimmer,
Tobias Jenke,
M. G. D. van der Grinten,
M. A. H. Tucker
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2019.02.47089.118-18
Subject(s) - ultracold neutrons , trap (plumbing) , physics , nuclear physics , neutron , nuclear engineering , materials science , meteorology , engineering
Currently the most accurate measurements of neutron lifetime are being performed at the Petersburg Nuclear Physics Institute with ultracold neutrons (UCNs) stored in a gravitational trap. A modified setup with a large gravitational trap and cooling to 10–15 K is presented. The results of measurements of temperature dependence of UCN losses in collisions with walls, which were coated with a perfluorinated grease (Fomblin UT 18), at 300–77 K, are detailed. The probable heat inflow to the trap is estimated, and the feasibility of cooling to indicated temperatures in experiments with the modified setup is demonstrated.