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Valentina Santoro

Valentina Santoro

Senior lecturer

Valentina Santoro

Polarisation Development at the European Spallation Source

Author

  • Wai Tung Lee
  • Joel Hagman
  • Damian Martin rodriguez
  • Annika Stellhorn
  • Alex Backs
  • Thomas Arnold
  • Elizabeth Blackburn
  • Pascale Deen
  • Celine Durniak
  • Mikhail Feygenson
  • Alexander T. Holmes
  • Judith Houston
  • Sebastian Jaksch
  • Oliver Kirstein
  • Dan Mannix
  • Martin Månsson
  • Manuel Morgano
  • Gøran Nilsen
  • Daria Noferini
  • Tommy Nylander
  • Dmytro Orlov
  • Valentina Santoro
  • Søren Schmidt
  • Michael Schulz
  • Werner Schweika
  • Aureliano Tartaglione
  • Rasmus Toft-Petersen
  • Félix J. Villacorta
  • Maximillian Wolff
  • Robin Woracek
Show all

Summary, in English

To meet the ever-increasing user demand, eleven of the fifteen European Spallation Source (ESS) instruments under construction aim to offer polarised neutrons for user experiments. They include an imaging instrument, a SANS instruments, two reflectometers, three diffractometers, and four spectrometers. In conjunction with in-kind contributions and instrumentation grants, the ESS Polarisation Project will support the incorporation of polarisation analysis on eight of the eleven instruments. The project aims to deliver polarised neutrons for first-science experiments as instruments enter operation. Different polariser and polarisation analyser techniques will be available to accommodate the specifics of experiments on a given instrument. Polarised 3He neutron spin filter using either Metastable Optical Pumping (MEOP) or Spin-Exchange Optical Pumping (SEOP) techniques will provide shared-use equipment among many instruments, with SEOP’s main application being in situ beam-polarisation. Several instruments will also use polarising-supermirror devices. To provide wide-bandwidth spin-flipping capability to the time-of-flight instruments, Adiabatic Fast Passage (AFP) neutron spin flippers, also known as gradient-field radiofrequency spin flippers will be the main method of choice. Devices based on the same AFP principle will also be used to flip 3He nuclear spins. We are constructing our first 3He polariser setup, including field coils to produce highly uniform magnetic field. Monte Carlo simulations are being done for the supermirror polarisers. To ensure science-focused development, we are working with university partners in doing scientific experiments with polarised neutrons. These are some of the activities developing polarisation analysis for ESS instruments in our project.

Department/s

  • Physical Chemistry
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • LU Profile Area: Light and Materials
  • LTH Profile Area: Photon Science and Technology
  • Synchrotron Radiation Research
  • Mechanics, Materials and Component Design
  • Materials Engineering
  • NanoLund: Centre for Nanoscience
  • European Spallation Source ESS AB
  • LTH Profile Area: Engineering Health
  • LTH Profile Area: Circular Building Sector

Publishing year

2023-10-01

Language

English

Pages

03004-03004

Publication/Series

EPJ Web of Conferences

Volume

286

Document type

Journal article

Publisher

EDP Sciences

Topic

  • Condensed Matter Physics

Status

Published

Project

  • Neutron Polarisation Capability Development for User Experiment Applications on ESS Instruments
  • Polarisation for first science and beyond at the ESS
  • Wide-angle neutron polarisation analysis to study energy and quantum materials

ISBN/ISSN/Other

  • ISSN: 2100-014X