The Instrument Operations Engineer (IOE) plays a central and hands-on role in ensuring the readiness, reliability, and long-term functionality of neutron scattering instruments at the European Spallation Source (ESS). Working closely with scientists, engineers, and technicians, the IOE contributes throughout the full lifecycle of an instrument, from installation and commissioning to routine...
As part of the experiments at RESEDA, scientists need the ability to align the sample to the neutron beamline according to the experimental specifications and to capture a broader spectrum within the sample by moving the stages.
In the contribution, we describe the setup of the sample stage according to the scientific specifications, the mechanical attachment to the marble floor, the...
For specific experiments at the new cold neutron triple axis spectrometer KOMPASS, a precisely aligned magnetic field is required. This field is generated using a Helmholtz coil system, which allows controlled rotation of the magnetic field in space. To prevent interference from the neutron reflecting sample striking the coil segments, the system must be rotatable out of the neutron beam. A...
The cold triple-axis spectrometer (TAS) FLEXX at HZB was a well-designed and upgraded instrument [1-4]. There was a strong wish that this excellent instrument should be preserved for the community. One attractive gap in the present instrumentation suite of MLZ, is the Larmor-diffraction technique [5-6] (LD) and, as a natural extension, cold neutron resonant spin echo (NRSE). TAS comes at no...
DENIM XIV Abstract – Poster : Intensive Re-design of a FERMI Neutron Chopper.
Peter Galsworthy – peter.galsworthy@stfc.ac.uk
ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Campus, Didcot, OX11 0QX
Following a major failure of a FERMI Neutron Chopper at high speed, the ISIS Neutron Chopper Design team started an investigation into the likely cause of the failure and...
The existing XYZ field system for PASTIS at TOPAS (FRM-2) has several disadvantages.
It has residual blind spots, a limited vertical acceptance angle, and limited access for 3He cell installation.
To solve these disadvantages, a prototype of a Halbach ring pair for the horizontal X and Y
fields, is currently under development. This prototype will be used with a Helmholtz coil for the Z...
The HEIMDAL thermal chopper system consists of two main sub-systems: the in-bunker Front End chopper system and the out-of-bunker TFOC chopper system. The poster is about the more complex in-bunker system which is a new design compared to the previous systems the ESS Neutron Chopper Group (NCG) has developed so far. The system houses two separate mechanical assemblies which are integrated onto...
Design of custom personal platform, to allow loading of large samples from top.
Addition of new PPS equipment and modification of existing ones.
Issues with installation.
The neutron backscattering spectrometer (NUBS) currently under construction at China Spallation Neutron Source (CSNS) Phase II project will become the facility's longest spectrometer, featuring a 90-meter moderator-to-sample distance. Utilizing Channel 10, this spectrometer implements an beam-splitting guide design to simultaneously accommodate the NUBS operation and a future 10A beamline,...
An overview of a novel 2m diameter neutron detector being built at ISIS, which uses curved wavelength shifting fibres arranged to form concentric circles.
Materials and components with intricate geometries, such as from additive manufacturing (AM), require highly flexible sample positioning systems during diffraction experiments. The STRESS-SPEC group at Heinz Maier-Leibnitz Zentrum (MLZ), Germany, has pioneered the use of industrial robots [1, 2] to enhance sample handling and positioning at neutron diffractometers. While these robots may...
The ESS facility has been receiving a large number of subsystems to be installed across various instruments. The MCA group has faced the challenge of performing numerous acceptance tests for all motion-related devices within a short period of time. To ensure timely delivery and maintain a high-quality standard, the MCA group has developed a testing method based on ISO standards and automated...
The European Spallation Source is a multi-disciplinary research facility which will deliver intense pulsed neutron beams to enable groundbreaking studies of materials in various scientific fields, including physics, chemistry, biology, and engineering. The first facility which will receive neutrons at ESS is the Test Beamline (TBL). It is designed to validate the successful commissioning of...
With the European Spallation Source approaching the milestone of beam on target, our team continues to work diligently on the development and construction of chopper systems. Over the past two years alone, we have successfully built and tested nine systems and are currently in the process of assembling five more.
Each system demands significant time and effort, presenting a range of unique...
When heavy shielding elements need to be placed outside the area accessible to cranes, installing a rail system can provide an effective solution. This poster outlines our practical experience with such a setup, highlighting the main challenges encountered and valuable lessons learned to help others avoid common pitfalls.
A brief overview of our rail system is presented, along with...
The ESS neutron instrument suite requires a large number of cabinets and cables for motion applications. The Motion Control and Automation Group (MCAG) standardization effort of the motion components across the facility ensures that the quality and reliability requirements are met. This standardization directly impacts the operation, maintenance, and upgrade of the systems.
During the final...
Beamline operations at the ISIS Neutron and Muon Source demand rigorous safety measures to protect personnel primarily from radiological hazards and, other identified hazards. The Personnel Protection Systems are developed in alignment with SC40 (Interlocks for Personnel and Enviromental Protection) and IEC 62061:2021 (Safety of machinery - Functional safety of safety-related control systems)...
Over the nearly 20 years of operation of the OPAL reactor and Neutron Beam Instruments a number of materials have been impacted by radiation. This poster will cover the types of materials and what mitigation strategies and tests we have come up with to deal with these challenges.
Materials that have seen damage from radiation include Neutron Guide delamination, Loss of Magnetism in Laser...
PUMA is the thermal neutron three-axes spectrometer (TAS) at MLZ. Owing to the dynamical double-focusing technique and compact neutron optics with wide beam divergence, PUMA is mainly characterized as one of the highest neutron flux TAS. The typical scientific applications of PUMA are studies of phonons and magnons. Since 2021, PUMA is co-operated by the Institute of Quantum Materials and...
The reliable performance of limit switch actuators is essential for achieving both safe operation and long-term durability in precision positioning control systems. Several factors and selection criteria must be carefully addressed during the different stages of the system design. This work presents the critical design decisions required to ensure safety, accuracy, and durability in limit...
The T0 chopper system is designed to block fast neutrons and gamma radiation from the prompt source pulse. To attenuate the fast neutrons to the required level, the T0 chopper places an attenuator mass of high cross-section materials in the neutron beam. The arrangement of materials is optimised to serve the purpose and consists of boron carbide, tungsten alloy, copper-chromium alloy and...
As the European Spallation Source (ESS) advances through construction and commissioning in Lund, Sweden, it is crucial to evaluate the status of each system and ensure that 3D models and 2D drawings accurately represent on-site conditions. The as-built process for mechanical systems is fundamental in maintaining accuracy, ensuring compliance, and reducing risks while easing future maintenance....
The successful delivery of large-scale scientific infrastructure relies on the seamless integration of advanced research objectives with structured engineering practices. In science-based facilities, this intersection often presents challenges, as scientific exploration encounters the rigor and discipline of established engineering workflows. This presentation examines key lessons drawn from...
In J-PARC MLF (Materials and Life Science Experimental Facility), we maintain and operate 6 T0 choppers on JAEA instruments. The T0 choppers had been more than 10 years since they were installed, and they had begun to deteriorate over time, and performance improvements were also necessary.
We developed 2nd generation T0 chopper which is high-speed and high-durability, and 2 of them have been...
High pressure can reduce atomic distances, increase the density of the electron cloud, and alter the crystal and magnetic structures of materials. High-pressure technology serves as a vital tool for regulating the crystal structure and physical properties of materials. By leveraging the high penetrability of neutrons, in-situ high-pressure neutron scattering experiments can be conducted under...
