27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Design, Manufacture and Testing of a Pair of Superconducting Solenoids for the Upgrade of the Neutron Spin-Echo Spectrometer J-NSE at the Research Reactor FRM II (Munich)

30 Aug 2017, 18:00
15m
Auditorium

Auditorium

Regular 15 minutes Oral Presentation A5 - Particle Detector Magnets Wed-Af-Or25

Speaker

Cristian Boffo (Babcock Noell)

Description

A Neutron Spin-Echo (NSE) -spectrometer measures small velocity changes that neutrons undergo upon scattering at a sample. The velocity changes are encoded/decoded by the neutrons spin precession in large magnetic field before and after the sample. In order to achieve maximum sensitivity and efficiency, both a high value and a high precision of the magnetic field integral before and after the sample, which determines the resolution of the instrument, are required. FZJ has decided to substitute the water-cooled copper coils of the J-NSE installed at the research reactor FRM II in Munich with a fully symmetric pair of large superconducting coil-systems to allow for a higher magnetic field integral. Each coil-system consists of 10 individual coils in a cryostat to achieve a field shape with minimal intrinsic field integral inhomogeneity over the beam cross section. Each system contains about 59 km of NbTi strand and a cold mass of 2 tons conduction cooled by two pulse tube cryocoolers. The resolution of the J-NSE will be extended significantly by the application of these new coils. This document presents the engineering results and design as well as manufacture and acceptance testing of the superconducting coil-systems.

Submitters Country Germany

Primary author

Cristian Boffo (Babcock Noell)

Co-authors

Dr Stefano Pasini (Forschungszentrum Jülich GmbH ) Dr Olaf Holderer (Forschungs-Neutronenquelle Heinz Meier-Leibnitz) Mr Tadeusz Kozielewski (Forschungszentrum Jülich GmbH ) Prof. Michael Monckenbusch (Forschungszentrum Jülich GmbH ) Mr Achim Sendner (Babcock Noell GmbH ) Dr Jochen Steinmann (Babcock Noell GmbH ) Mr Eckhard Theisen (Babcock Noell GmbH ) Dr Wolfgang Walter (Babcock Noell GmbH )

Presentation Materials