Advanced Methods & Techniques JRA - achievements as of today

Here is a summary of the achievements by the Advanced Methods and Techniques JRA, on the road to new instrumental set-ups for the benefit of neutron users.

, 31/07/2015

On this page we summarise the achievements by the Joint Research Activities (JRA) on Advanced Methods and Techniques, as of July 2015. Below you can see the main developments of each of the JRA tasks.

This JRA aims to explore novel techniques to introduce conceptually new instrumental set-ups, as well as the development of a prototype development to pave the road for implementation on user instruments with a particular emphasis on the characteristics of the future European Spallation Source (ESS).

For more information about the different tasks of this JRA please visit this page .

Achievements of each task

Resonance circuit NRSE, MIEZE Resonance circuit NRSE, MIEZE

Resonance circuit NRSE, MIEZE

Sub-mm3 samples for extreme environments

  • Software for optimizing the design of multi-channel, neutron focusing guides for sample environments at extreme conditions using artificial intelligence techniques.

Spin Echo with Oscillating Intensity for the ESS

  • Desktop setup for testing the design of an electronic circuit performing the modulation of the RF amplitude during a pulse in order to stay in resonance with the static field.
Drawing of the Multi Fermi Chopper Drawing of the Multi Fermi Chopper

Multi Fermi chopper

Choppers for the ESS instrumentation

  • Single Fermi collimator rotor with Gd-foils in a test housing to perform mechanical and neutron tests up to 1KHz rotation speed.
  • Beam-size array of slim rotors that are operated synchronously and eventually with adjustable phases.
Schematic drawing of the polarising cavity illustrating the separation and recombination of the neutron beams Schematic drawing of the polarising cavity illustrating the separation and recombination of the neutron beams

Polarising cavity

Polarising all neutrons in a beam

  • New SM- cavity design that overcomes existing limitations
    - The neutron beams are separated according to their polarisation
    - One polarization is flipped with a broad band radiofrequency flipper
    - The beams are recombined and focussed to the sample

Images

Schematic drawing of the polarising cavity illustrating the separation and recombination of the neutron beams
Schematic drawing of the polarising cavity illustrating the separation and recombination of the neutron beams
Performance SM- cavity
Performance SM- cavity
Advanced Methods and Techniques JRA
Advanced Methods and Techniques JRA

Task 5. Schematic configuration of the optimized polarizing device seen from the top.

Multi Fermi Chopper
Multi Fermi Chopper
Drawing of the Multi Fermi Chopper
Drawing of the Multi Fermi Chopper
Preliminary rotor models: strain analysis
Preliminary rotor models: strain analysis

Highlights from this JRA

RFSF installed in RESEDA. RFSF installed in RESEDA.

New type of radiofrequency spin flippers for Neutron Resonance Spin Echo

The Advanced Methods and Techniques JRA has developed a new type of RFSF to enhance NRSE spectrometers. Read more.

IN5

How to optimise multi-channel neutron focusing guides for extreme sample environments?

NMI3 collaboration works on simulations to find the best possible guide for experiments at low temperatures and high magnetic fields. Read more.