Phase space transformation on ultra cold neutrons

Article type: Research Article

Authors: Boehm, M.^; | Henggeler, W. | Allenspach, P. | Furrer, A.

Affiliations: Laboratory for Neutron Scattering, ETHZ & PSI, CH-5232 Villigen PSI, Switzerland | Institut Laue-Langevin, 6, rue Jules Horowitz, F-38042 Grenoble Cedex 9, France

Note: [] Corresponding author. Address: Institut Laue-Langevin, 6, rue Jules Horowitz, F-38042 Grenoble Cedex 9, France. E-mail: [email protected]

Note: [] http://ucn.web.psi.ch/proposals/ucn_techrev.pdf

Note: [] http://ucn.web.psi.ch/proposals/ucn_techrev.pdf

Note: [] http://ucn.web.psi.ch/proposals/ucn_techrev.pdf

Note: [] http://ucn.web.psi.ch/proposals/ucn_techrev.pdf

Abstract: We present the results of a Monte Carlo simulation and analytical calculations for a phase space transformer, which accelerates ultra-cold neutrons (UCNs) to cold or thermal neutron energies. We show that due to the sharp energy distribution of UCN’s this kind of neutron device is able to produce monochromatized neutrons with intensities competing today’s most performing time-of-flight instruments, an energy resolution of the order of δE/E ∼ 0.3%, and a horizontal divergency of ∼2° at the planned spallation source for UCN’s (PSI, Switzerland).

Keywords: Neutron scattering, Ultra-cold neutrons, Phase space transformer, Doppler effect, Monte Carlo simulation

DOI: 10.1080/10238160512331329974

Journal: Journal of Neutron Research, vol. 13, no. 4, pp. 241-250, 2005