Algorithm of the Computer Modelling and a SESANS Setup with Adiabatic RF-Flippers
W.H. Kraan (TU Delft - RST/Neutron and Positron Methods in Materials)
V. N. Zabenkin (Petersburg Nuclear Physics Institute (PNPI))
LA Axelrod (Petersburg Nuclear Physics Institute (PNPI))
Yu.O. Chetverikov (Petersburg Nuclear Physics Institute (PNPI))
SV Grigoriev (Petersburg Nuclear Physics Institute (PNPI))
E.G. Yashina (Petersburg Nuclear Physics Institute (PNPI))
A.A. Sumbatyan (Petersburg Nuclear Physics Institute (PNPI))
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
We made software to simulate Larmor precession in a setup for SESANS with adiabatic/RF flippers in magnets, existing at PNPI. The final polarisation of a divergent “ribbon beam” of height 2 cm is calculated as a function of λ. For λ= 6 A, flippers 56 cm apart and RF frequency 1 MHz we find spin-echo length δ= 0.9 μm. We show numerically, how λ is converted to δ. Extension to δ= 20 μm is realistic.