A device for simultaneous spin analysis of ultracold neutrons

S. Afach; G. Ban; G. Bison; K. Bodek; Z. Chowdhuri; M. Daum; M. Fertl; B. Franke; P. Geltenbort; Z. D. Grujić; L. Hayen; V. Hélaine; R. Henneck; M. Kasprzak; Y. Kermaïdic; K. Kirch; S. Komposch; A. Kozela; J. Krempel; B. Lauss; T. Lefort; Y. Lemière; A. Mtchedlishvili; O. Naviliat-Cuncic; F. M. Piegsa; G. Pignol; P. N. Prashanth; G. Quéméner; M. Rawlik; D. Ries; D. Rebreyend; S. Roccia; D. Rozpedzik; P. Schmidt-Wellenburg; N. Severijns; A. Weis; E. Wursten; G. Wyszynski; J. Zejma; G. Zsigmond

doi:10.1140/epja/i2015-15143-7

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A (2015) 51: 143
https://doi.org/10.1140/epja/i2015-15143-7

Special Article - Tools for Experiment and Theory

A device for simultaneous spin analysis of ultracold neutrons

S. Afach¹^,2^,3, G. Ban⁴, G. Bison², K. Bodek⁵, Z. Chowdhuri², M. Daum², M. Fertl¹^,2, B. Franke¹^,2, P. Geltenbort⁶, Z. D. Grujić⁷, L. Hayen⁸, V. Hélaine²^,4^*, R. Henneck², M. Kasprzak⁷, Y. Kermaïdic⁹, K. Kirch¹^,2, S. Komposch¹^,2, A. Kozela¹⁰, J. Krempel¹, B. Lauss², T. Lefort⁴, Y. Lemière⁴, A. Mtchedlishvili², O. Naviliat-Cuncic⁴, F. M. Piegsa¹, G. Pignol⁹, P. N. Prashanth²^,8, G. Quéméner⁴, M. Rawlik⁵, D. Ries²^,3, D. Rebreyend⁹, S. Roccia¹¹, D. Rozpedzik⁵, P. Schmidt-Wellenburg², N. Severijns⁸, A. Weis⁷, E. Wursten⁸, G. Wyszynski¹^,5, J. Zejma⁵ and G. Zsigmond²

¹ ETH Zürich, Institute for Particle Physics, CH-8093, Zürich, Switzerland
² Paul Scherrer Institute, CH-5232, Villigen-PSI, Switzerland
³ Hans Berger Department of Neurology, Jena University Hospital, D-07747, Jena, Germany
⁴ LPC Caen ENSICAEN, Université de Caen, CNRS/IN2P3, F 14050, Caen, France
⁵ Marian Smoluchowski Institute of Physics, Jagiellonian University, 30-059, Cracow, Poland
⁶ Institut Laue-Langevin, Grenoble, France
⁷ Physics Department, University of Fribourg, CH-1700, Fribourg, Switzerland
⁸ Instituut voor Kernen Stralingsfysica, Katholieke Universiteit Leuven, B-3001, Leuven, Belgium
⁹ LPSC, Université Grenoble Alpes, CNRS/IN2P3, Grenoble, France
¹⁰ Henryk Niedwodniczański Institute for Nuclear Physics, 31-342, Cracow, Poland
¹¹ CSNSM, Université Paris Sud, CNRS/IN2P3, Orsay campus, France

^* e-mail: helaine@lpsc.in2p3.fr

Received: 17 February 2015
Accepted: 9 October 2015
Published online: 10 November 2015

Abstract

We report on the design and first tests of a device allowing for measurement of ultracold neutrons polarisation by means of the simultaneous analysis of the two spin components. The device was developed in the framework of the neutron electric dipole moment experiment at the Paul Scherrer Institute. Individual parts and the entire newly built system have been characterised with ultracold neutrons. The gain in statistical sensitivity obtained with the simultaneous spin analyser is % relative to the former sequential analyser under nominal running conditions.