A. P. Serebrov, E. A. Kolomenskiy, A. K. Fomin, A. O. Koptyukhov, I. A. Krasnoshсhekova, A. V. Vasil'ev, D. M. Prudnikov, I. V. Shoka, A. Chechkin, M. E. Chaikovskii, V. E. Varlamov, S. N. Ivanov, A. N. Pirozhkov, P. Geltenbort, O. Zimmer, T. Jenke, M. G. D. van der Grinten, M. A. H. Tucker, “Experimental setup for neutron lifetime measurements with a large gravitational trap at low temperatures”, Zhurnal Tekhnicheskoi Fiziki, 2019, Volume 89, Issue 2,Pages <nobr>314

This article is cited in 1 paper

Experimental instruments and technique

Experimental setup for neutron lifetime measurements with a large gravitational trap at low temperatures

A. P. Serebrov^a, E. A. Kolomenskiy^a, A. K. Fomin^a, A. O. Koptyukhov^a, I. A. Krasnoshсhekova^a, A. V. Vasil'ev^a, D. M. Prudnikov^a, I. V. Shoka^a, A. Chechkin^a, M. E. Chaikovskii^a, V. E. Varlamov^a, S. N. Ivanov^a, A. N. Pirozhkov^a, P. Geltenbort^b, O. Zimmer^b, T. Jenke^b, M. G. D. van der Grinten^c, M. A. H. Tucker^c

^a The Petersburg Nuclear Physics Institute, The National Research Center "Kurchatov Institute"
^b Institut Max von Laue Paul Langevin, Grenoble Cedex, France
^c Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxon, OX11 0QX, UK

Abstract: 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.

Received: 20.03.2018

DOI: 10.21883/JTF.2019.02.47089.118-18