DENIM 2026 - XV Design and Engineering of Neutron Instruments Meeting

Session

POSTER SESSION

Sep 9, 2026, 2:00 PM

Buenos Aires, Argentina

15. Design of the Bulk Insert Adjustment Mechanism for the CSNS-II#3 Liquid Neutron Reflectometer

9/9/26, 2:00 PM

Mechanical structures

Poster Presentation

The bulk insert is a key shielding-penetration component in the CSNS-II project. Its inner end faces directly toward the target center, while its outer end connects to the external environment; consequently, the neutron guide housed within the bulk insert cannot be locally adjusted near the target side. Thus, the design of the adjustment mechanism for the bulk insert is critical for ensuring...

5. Engineering Progress on the Liquid Neutron Reflectometer at CSNS

Wenting Du (Institute of High Energy Physics, CAS)

9/9/26, 2:00 PM

Instrument design and construction

Poster Presentation

The first horizontal-geometry liquid neutron reflectometer (LNR) of China is now being constructed in China Spallation Neutron Source (CSNS), which is designed to complement the existing vertical-geometry reflectometer and address the urgent demand for in-situ characterization of gas-liquid, liquid-liquid, and solid-liquid interface structures in colloid chemistry, biomedicine, advanced...

7. NEW NUTATOR FOR SPHERICAL NEUTRON POLARIMETRY

Adrian Nyc (Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich, Garching, Germany)

9/9/26, 2:00 PM

Instrument design and construction

Poster Presentation

An important area of fundamental research with neutrons is the investigation of magnetic materials. Spherical neutron polarimetry (SPN) can be used. For this, a spin-polarized neutron beam is used, which hits the sample and the scattered intensity is then measured with detectors. In order to adiabatically rotate the polarity of the neutron beam in the required direction, a rotatable magnetic...

23. Shutter Design for the Primary Beam of the LaDiff Triple-Axis Spectrometer

Daniel Zahreddin (TUM FRM II)

9/9/26, 2:10 PM

Shielding

Poster Presentation

The cold triple-axis spectrometer (TAS) FLEXX at HZB was a highly successful instrument that underwent several upgrades during its operation [1–4]. Preserving its capabilities for the neutron scattering community has been a major motivation for the development of the new LaDiff instrument at MLZ. In particular, LaDiff addresses the current lack of Larmor diffraction (LD) [5–6] and, as a...

20. THE ESSENTIAL PARTNERSHIP: COLLABORATIVE EFFORTS BETWEEN DESIGN ENGINEERS AND ENGINEERING TECHNICIANS

Doug Johnson (NIST Center for Neutron Research)

9/9/26, 2:10 PM

Project management

Poster Presentation

Problem
At the NCNR we have encountered issues during instrument installations and maintenance where it would have been beneficial to obtain firsthand knowledge on how an engineering technician would perform a task. Topics such as specific tooling, rigging for lifting, order of assembly, access for maintenance etc. Consulting with technicians during design reviews provides valuable...

18. Upgrade of the Compact Rotary Platform for the KOMPASS Helmholtz Coil System: Integration of a Non-Magnetic Worm Gear for Torque Enhancement

Manuel Müller (Forschungs-Neutronenquelle Heinz Maier Leibnitz (FRM II))

9/9/26, 2:10 PM

Mechanical structures

Poster Presentation

For polarization analysis experiments at the cold neutron triple-axis spectrometer KOMPASS, a precisely aligned magnetic field of up to 20 x 10-4 T is required, generated by a specialized Helmholtz coil system. To prevent reflection interference of the neutron beam at the coil segments, a custom-designed, non-magnetic, low-profile rotary platform was developed.

During initial testing of...

29. DIFFRACTOMETER FOR RESIDUAL STRESS ANALYSIS INSTRUMENT UPGRADE

Ed Binkley (NIST Center for Neutron Research)

9/9/26, 2:20 PM

Instrument design and construction

Poster Presentation

The NCNR has upgraded and added new capabilities to the Diffractometer for Texture and Residual Stress (DARTS) The purpose of the instrument is to non-destructively measure tri-axial residual stresses in industrial parts and structural materials at spatial resolutions  1 mm3. Stresses are determined from the measurement of elastic changes in the interatomic lattice spacing at depths up to...

32. Rotation Stress Rig for Combined Tensile–Torsional In Situ Neutron Imaging and Diffraction at ESS

Luca Sagliano (European Spallation Source)

9/9/26, 2:20 PM

Mechanical structures

Poster Presentation

Understanding the behaviour of engineering materials under complex loading conditions requires experimental systems capable of reproducing realistic mechanical states while allowing the evolution of internal features to be investigated. Neutron imaging and diffraction are powerful complementary techniques for studying deformation, strain development, and damage mechanisms in bulk materials....

24. Vertical drive for two polarizers at RESEDA (Project TIGER (Thermal mIeze for GreatEr Ranges))

Christian Fuchs (MLZ Research Neutron Source FRM II)

9/9/26, 2:20 PM

Instrument design and construction

Poster Presentation

The TIGER project comprises the development, construction, and commissioning of the world's first thermal MIEZE spin-echo option at the resonant neutron spin-echo spectrometer RESEDA. Its objective is to extend the accessible parameter range of RESEDA towards higher momentum and energy transfers while maintaining the highest energy resolution through the additional use of thermal neutrons with...

33. Design and Manufacturing of an Helium-3 Gas Transfer System for the CSPEC Detectors at ESS

Antoine Lepine (European Spallation Source ERIC)

9/9/26, 2:30 PM

Detectors

Poster Presentation

The CSPEC instrument at the European Spallation Source (ESS) uses 12 large-area 3He detectors that will require evacuation, filling, and occasional gas recovery throughout their lifetime. To handle the detector gases while minimizing the loss 3He, a dedicated mobile gas transfer system was developed.

The design is based on an existing gas transfer bench developed at the Institut...

36. Development and integration of Control Systems and metrology for neutron instrumentation: applications in ANDES and ASTOR

Mr Felix Maciel (CNEA)

9/9/26, 2:30 PM

Control systems

Poster Presentation

Abstract
This poster describes progress in the implementation of distributed control systems and metrological validation for parts of neutron beam instruments at the Argentine Neutron Beam Laboratory (LAHN). Within the framework of the ANDES (Advanced Neutron Diffractometer for Engineering & Science) project, a control scheme based on the Tango Controls paradigm was developed, using the...

34. Thermal Neutron Three Axes Spectrometer PUMA: Recent Instrumentation Development

Yongjin Kim (FRM II)

9/9/26, 2:30 PM

Instrument design and construction

Poster Presentation

PUMA is the thermal neutron three axes spectrometer (TAS) at MLZ, which is co-operated by the Institute of Quantum Materials and Technologies of the Karlsruhe Institute of Technology (IQMT, KIT) and the Technical University of Munich (TUM). Owing to the dynamical double-focusing technique and compact neutron optics with wide beam divergence, PUMA is mainly characterized as one of the highest...

37. Evaluation of Alternative Materials for the T0 Chopper Hammer Using PHITS

Ryota Komine (J-PARC MLF)

9/9/26, 2:40 PM

Turning machines (choppers, NVS)

Poster Presentation

In the Material and Life Science Experimental Facility (MLF) at J-PARC, six T0 choppers are operated on JAEA instruments. These choppers have been in operation for over ten years since their installation, and to enhance functionality, we have developed a second-generation T0 chopper. Since the first-generation, Inconel X750—a nickel-based alloy—has been used for the hammer material. However,...

39. SNS Survey, Alignment, and Metrology

Derek Doane (Oak Ridge National Laboratory (Spallation Neutron Source))

9/9/26, 2:40 PM

Mechanical structures

Poster Presentation

This poster will present the precision measurement and alignment capabilities of the Survey, Alignment, and Metrology Group at the Spallation Neutron Source (SNS). Our team provides high accuracy geometric characterization across both accelerator systems and neutron beamlines, supporting reliable operations and enabling consistently high quality neutron production. Core activities include...

38. “AnGI”, the new Instrument for Prompt Gamma Neutron Activation Analysis (PGNAA) at the RA-6 Research Reactor, Argentina.

Fernando Ariel Sánchez (COMISION NACIONAL DE ENERGIA ATOMICA)

9/9/26, 2:40 PM

Shielding

Poster Presentation

A new instrument for Prompt Gamma Neutron Activation Analysis (PGNAA) has been installed at the RA-6 (1 MW) research and training reactor located at the Bariloche Atomic Centre (San Carlos de Bariloche, Argentina). This non-destructive elemental analysis technique enables the determination of major components and is particularly useful for quantifying B, Cd, Sm and Gd at trace levels, as well...

41. Collimation system design for the BIAR diffractometer at the IEA-R1 reactor

Luiz Paulo de Oliveira (Reator Multipropósito Brasileiro - CNEN)

9/9/26, 2:50 PM

Instrument design and construction

Poster Presentation

In this work, we present the design of the neutron collimation system for the high-resolution neutron powder diffractometer at IPEN/CNEN, named BÎAR (Brazilian Instrument of Adjustable Resolution). The IEA-R1 reactor is a 5 MW light-water-moderated research reactor located at the Institute for Energy and Nuclear Research (IPEN) in São Paulo, Brazil. The design of the collimation system...

42. Design of a replacement Optical Bench and new Polariser for the Pelican Inelastic Instrument at ANSTO

Scott Olsen (Australian Nuclear Science and Technology Organisation)

9/9/26, 2:50 PM

Mechanical structures

Poster Presentation

The Inelastic Neutron Time of Flight Instrument Pelican began operating in 2014. The instrument has a high intensity and high resolution master fermi chopper. Due to space constraints and shielding designs the time to change between the choppers is over half a day. As a result this change is very rarely undertaken.

A new optical bench design is underway in which a translation system will...

40. The first high-fidelity Monte Carlo model of the Brazilian IEA-R1 nuclear reactor

Alexandre Souza (Instituto de Pesquisas Energéticas e Nucleares)

9/9/26, 2:50 PM

Instrument design and construction

Poster Presentation

Alexandre P.S. Souza1,2, Carlos G.S. Silva1,2, Frederico A. Genezini1,2
1Reator Multipropósito Brasileiro (RMB), Comissão Nacional de Energia Nuclear (CNEN),
São Paulo – Brazil.
2Instituto de Pesquisas Energéticas e Nucleares (IPEN), Comissão Nacional de Energia Nuclear (CNEN), São Paulo – Brazil.
alexandre.s-fpatria@ipen.br
In this work, we present the first high-fidelity Monte Carlo...

48. Multiscale Dot Patterns and a Scalable Calibration Framework for Geometric Distortion Characterization in Neutron Imaging

Peter Zabala Medina (Laboratorio Argentino de Haces de Neutrones (LAHN), Comisión Nacional de Energía Atómica (CNEA))

9/9/26, 3:00 PM

Instrument design and construction

Poster Presentation

Scintillator-camera detector systems are widely used in neutron radiography and tomography, yet geometric distortions and field-dependent effects are seldom characterized within a rigorous metrological framework. Uncorrected distortions can propagate into reconstructed volumes, introducing systematic dimensional bias and spatial non-uniformities that limit quantitative reliability and...

49. NAHUEL: A new time-of-flight instrument installed at the Experimental Reactor RA-6 at Centro Atómico Bariloche

Dr Luis Alberto Rodríguez Palomino (CNEA-CONICET-UTN)

9/9/26, 3:00 PM

Instrument design and construction

Poster Presentation

The NAHUEL instrument (Neutrones para Análisis de Haces en Usos de Espectrometría en Longitud de Onda) is the first time-of-flight (TOF) neutron instrument to operate at an Argentine research reactor. Recently commissioned at the RA-6 reactor at the Bariloche Atomic Centre, Argentina, NAHUEL supports both fundamental and applied research in nuclear engineering and related technologies. In this...

52. Proof-of-Concept Demonstration of a Polychromatic Multiplexed Neutron Stress–Strain Diffractometer at the MIT Reactor

Dr Jay T. Cremer (Adelphi Technology Inc.)

9/9/26, 3:00 PM

Neutron optics

Poster Presentation

Engineering diffractometers at reactor neutron sources typically use monochromatic beams and scan detectors through 2θ to measure selected Bragg reflections. Because the scattering angle varies among reflections, this geometry can produce asymmetric, reflection-dependent gauge volumes. In contrast, time-of-flight engineering diffractometers commonly use detector banks fixed near 90°, providing...

56. Optimisation of the Neutron Beam Slit Aperture Assembly for an Ultra Narrow Design

Scott Olsen (Australian Nuclear Science and Technology Organisation)

9/9/26, 3:10 PM

Instrument design and construction

Poster Presentation

This submission presents the process and outcome for the development of an optimised neutron beam slit aperture assembly. The Australian Centre for Neutron Scattering (ACNS) utilises slit assemblies to limit and shape neutron flow along the beamlines in the facility. Minimising the linear footprint and simplifying the operation of these assemblies allows additional equipment and/or...

63. SANS-MB: intrumentación para la dispersión de neutrones a bajo ángulo del LAHN

Fernando Pschunder (LAHN-CNEA)

9/9/26, 3:10 PM

Instrument design and construction

Poster Presentation

El Laboratorio Argentino de Haces de Neutrones (LAHN) constituye un centro nacional de referencia para la caracterización de materiales mediante técnicas neutrónicas de última generación. Sus instrumentos aprovecharán las fuentes térmica y fría del reactor RA-10, actualmente en fase final de construcción en el Centro Atómico Ezeiza (Buenos Aires, Argentina). Las facilidades experimentales...

53. Two Stage Gamma-Neutron Source Classification in Water Cherenkov Detectors: Energy Threshold Screening and Machine Learning Pulse Analysis

Alejandro Said Núñez Selin (CNEA)

9/9/26, 3:10 PM

Detectors

Poster Presentation

Water Cherenkov detectors (WCDs) offer a robust and economical solution for real time radiation monitoring by detecting Cherenkov light from charged particles moving faster than light in water. This work presents a novel two stage classification framework for gamma-neutron discrimination: an initial physics based energy threshold filters unambiguous low energy gamma sources, followed by a...

65. Experimental testing to define the sliding floor specifications for the ANDES Instrument

Mr Emanuel Adrián (CNEA)

9/9/26, 3:20 PM

Mechanical structures

Poster Presentation

The Laboratorio Argentino de Haces de Neutrones (LAHN) is currently developing the ANDES (Advanced Diffractometer for Engineering and Science) neutron instrument for the Reactor RA-10. The instrument requires the highly accurate positioning and displacement of its subsystems over a specially designed sliding floor. These operational requirements impose stringent design specifications on the...

68. Neutron Guide Performance Evaluation for the LAHN High-Resolution Powder Diffractometer Using a KDS-Based Neutron Source

Diego G. Franco (CNEA-CONICET)

9/9/26, 3:20 PM

Instrument design and construction

Poster Presentation

We are currently developing a high-resolution powder diffractometer for the GT1 beamline of the RA-10 multipurpose research reactor at the Argentine Laboratory for Neutron Beams (LAHN). The optimization of the instrument neutron optics requires realistic simulations capable of reproducing the spatial, angular, and chromatic distributions of the incident neutron beam.
In this work, we present...

67. Stakeholder Management and Planning–Execution Alignment in Scientific Megaprojects with In‑Kind Contributions

Tamires Gallo (European Spallation Source)

9/9/26, 3:20 PM

Project management

Poster Presentation

This study presents preliminary findings from an applied mixed‑methods investigation into how stakeholder management practices influence the alignment between planning and execution in international scientific megaprojects developed through In‑Kind Contributions (IKC). IKC‑based projects operate within distributed governance structures, multi‑institutional interfaces, and heterogeneous...

66. Thermal analysis and design optimization of the ANDES sample chamber using FEA

Lucas Mariano Montenegro (Centro de Investigación Laboratorio Argentino de Haces de Neutrones (LAHN), Comisión Nacional de Energía Atómica (CNEA), Buenos Aires, Argentina)

9/9/26, 3:20 PM

Mechanical structures

Poster Presentation

The design of highly controlled sample environments is a critical engineering challenge for the successful operation of modern neutron scattering facilities. The Argentine Neutron Beam Laboratory (LAHN), currently under construction, will host the Advanced Neutron Diffractometer for Engineering and Science (ANDES). This instrument is designed to characterize the crystallographic structures of...