Scientific-technical infrastructure for the research with neutrons - - PowerPoint PPT Presentation

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Scientific-technical infrastructure for the research with neutrons - - PowerPoint PPT Presentation

Mar 17, 2023 13 likes •226 views

Scientific-technical infrastructure for the research with neutrons and prominent projects at Helmholtz-Zentrum Berlin Axel Rupp Helmholtz-Zentrum Berlin fr Materialien und Energie Outline HZB Facility Overview Large Scale Facilities

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Scientific-technical infrastructure for the research with neutrons and prominent projects at Helmholtz-Zentrum Berlin

Axel Rupp

Helmholtz-Zentrum Berlin für Materialien und Energie

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 2

Outline

  • HZB Facility Overview

– Large Scale Facilities – Neutron Instruments

  • Organisational Structure
  • Scientific-Technical Capabilities

– User Service – Central Services

  • Recent and ongoing Projects

– New Cold Source Moderator Cell – Neutron Guide Upgrade ⁞

  • Project Management
  • Summary
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 3

Large Scale Facilities at HZB

HZB operates two large scale facilities for the investigation of matter which complement each other:

Research reactor BER II Electron storage ring BESSY II

 Neutrons  Photons (synchrotron radiation) 0.9Å <  < 30Å (cold source) 10pm (hard x-ray) <  < 1mm (THz) pulse lenghts 100fs; 2ps; 50ps Use: ○ Mainly neutron scattering resoIution 100pm ○ Chemical analysis 50 beamlines

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 4

Research reactor BER II

Commissioning (5 MW) 1973 Upgrade (10 MW) 1985 – 1991 Swimming pool reactor light water moderated 2 pools, each 3.5m  11m 1014 neutrons cm-2 s-1 (core) Cold Source  long wavelengths for ○ e.g. soft matter ○ SANS, TOF, …. 9 beam holes (thermal) 9 neutron guides (cold) 18 neutron instruments

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 5

Neutron Instruments

Instrumentation

7 Diffractometers 1 Triple-axis Spectrometer 2 Reflectometers 3 SANS instruments 2 Instruments for stress studies 3 Tomographie / Radiographie instruments 3 Instruments under construction

Neutron Guide Hall II

cold neutrons

Neutron Guide Hall I

cold neutrons

Experimental Hall

thermal neutrons

NEAT- Building

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 6

Organisation Chart

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 7

Scientific-Technical Infrastructure

User Platform

Operation Reactor Accelerator BESSY Surveyor Networks & Storage

  • Exper. Data Processing

Development Exp. Syst. User Service CARESS Electronics Electronics Development Electronics Workshop Technical User Support Instrument Electronics Instrument M echanics Technical Design M anufacturing Sample Environment

Research with Spallation Neutrons

Detector Laboratory Neutron Optics Group

User Service Central Services

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 8

Capabilities User Service

Instrument Mechanics at BER II

10 technicians All mechanical work to operate neutron instruments

  • Maintenance of neutron instruments
  • Technical user support
  • Technical advice to scientists

Sample Environment

8 (10) persons Operating a broad range of equipment to provide different sample environments

  • Temperature T = 30 mK – 2000 K
  • Magnetic field up to B = 17 T
  • Pressure up to p = 1.5 GPa
  • Mutually compatible

Lab for Magnetic Measurements

Options: heat capacity, heat conduction, magneto-caloric effect, magnetisation, resistivity, further under construction

DEGAS

Combines neutron scattering with in-situ- gas adsorption measurements

Instrument Electronics at BER II

2 engineers, 1 electrical mechanic Servicing all electronic systems to

  • perate neutron instruments
  • Maintenance of instrument electronics
  • Technical user support
  • Development of instrument electronics
  • Technical advice to scientists
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 9

Capabilities Central Services (I)

Technical Design

5 designers, 3 draughtsmen, 1 planning engineer, students Design of sophistcated (sub)units for experimental setups

  • Complete engineering data
  • Documentation
  • Monitoring of manufacturing
  • Support of commissioning
  • Support of the user service

Software: ● Solid Works (CAD-software)

  • COMSOL-Multiphysics (FE)

External processing of orders Purchase of materials Education of students

Manufacturing

26 mechanics, up to 20 apprentices Manufacturing and assembly of complex scientific apparatus Service and component manufacture for radiation protection areas Technologies:

  • CNC machining
  • Welding: (stainless) steel, aluminum
  • Laser welding
  • Laser cutting
  • Water jet cutting
  • Vacuum brazing
  • Vacuum testing
  • Ultrasonic cleaning
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 10

Capabilities Central Services (II)

Electronics

3 development engineers, 5 electronic technicians Development of analog and digital boards Manufacture of electronic devices Installation and service of process control systems

Detector Laboratory

5 scientists and engineers Detector development

BF3 detectors, MSGC (157GD/CsI converter)

Setup and commissioning of complete detection systems

  • Primary detectors
  • Frontend electronics (amplifiers,

discriminators)

  • Interfaces for data aquisition
  • Software: DeLiDAQ, Q-MesyDAQ

User support for a faultless

  • peration

Advice to instrument scientists, simulation calculations

Experiment Data Processing

5 (15) persons + students Development experiment systems Development and servicing CARESS Development and implementation of motor control systems

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 11

New Cold Source Moderator Cell

Exchange of the conical beamtube planning phase 2006 - 2009 training 2009 – 2010 Improved moderator cell design „hot“ phase 2010 - 2012 MCNP optimized parameters:

  • cell-core distance
  • length of cylinder
  • moderator thickness

50-60 % brilliance gain

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 12

Neutron Guide Upgrade

Period: 2009 – March 2012

  • 6 instead of 5 guides in NGH I
  • Twice the total cross section
  • m=3 coating instead of 58 Ni (m=1.2)

 Overall gain factor: 2 - 5  Total radiation increase by factor 20  Sandwich-type shielding (bPE + Fe)

  • Tight-fitting enclosure
  • Higher radiation attenuation
  • Enhanced flexibility
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012

Upgraded Cold TAS FLEXX

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Period: 2009 – Oct. 2012 (2013) Velocity selector Vertical guide changer (polariser or straight guide) Elliptical tapered guide section Virtual source Collimator ex- change system Double-focussing PG monochromator

  • Own neutron guide, end position

 Neutron optics tailored to particular instrument needs +

  • Increased neutron flux

 Increased wavelength range  Larger wavevector + energy transfer

Improved NRSE option

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 14

NEAT Upgrade Project

Period: 2010 – 2015

  • Novel Materials
  • Mapping of excitations in single

crystals

  • Chemical activity in biomolecules
  • Complex sample environments

Upgrade of neutron guide: x 5 Larger detection angle coverage x 8

Position sensitive detectors with BF3. Successful first tests Non-magnetic detector chamber New building New chopper system

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 15

High Field Magnet

Period: 2007 – 2014

Hybrid magnet + infrastructure

Central Field > 25 T (> 30) T Bore 50 mm horizontal Opening Angle Conical ends, 30° Power Resistive Insert 4 MW (8 MW) Field Homogeneity < 0.5% (20 mm x 20 mm Vol.) Operating Current 20 kA Magnetic Field of Resistive Insert 13 T – 19 T (4 MW / 8 MW) Magnetic Field of

  • Supercond. Coil

13 T Height ~ 5 m Total Weight ~ 30 t Cold Mass (4.5 K) ~ 9 t

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 16

High field magnet

Period: 2007 – 2014

Challenges

Design and Construction Series-Connected System:

  • SC coil (Cable-in-Conduit)
  • Resistive Bitter coil

Operation

  • 20 kA DC power supply
  • Helium refrigerator
  • High pressure cooling water
  • 4 / 8 MW cooling power
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 17

ESS-Design-Update-Phase

Period: 2010 – 2013

Testbeamline

Specific beamline to mimic the time structure of the ESS neutron pulses Aim: Study components and instrument concepts under real conditions Counter rotating chopper system 840rpm and 2520rpm + additional chopper systems Variable distances! Further activities:

157Gd-CsI MSGC Detectors

with high spatial resolution

  • Pos. resol. <0.5 mm

TOF resol. ~10 ns Specific ASICs and ADC boards

Simulation Code Development Concepts for Reflectometry, Neutron Radiography/Tomography, Extreme Sample Environment

1-3 µm

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 18

Project management

Conventional mangament tools Project coordinator

  • Definition project structure

▪ Support of the project leader

  • Project schedule

▪ Coordination ⁞ ▪ Controlling

Central document management system

Goals: More efficiency due to Avoidance of errors by

  • Easier search

▪ Centralisation

  • Worldwide access

▪ Marking

  • Automatical communcation

▪ Traceability …of information …of documents

Tested and applied at the High Field Magnet project

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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 19

Summary

Large Scale Facilities

  • HZB operates two large scale facilities for the investigation of matter:

research reactor BER II + electron storage ring BESSY II

  • BER II provides 18 instruments in the user service with neutrons

Organisational Structure

  • The scientific-technical infrastructure is largely centralised in the User

Platform

Scientific-Technical Capabilities

  • User service: Instrument Service Groups, CARESS User Service, SE,

Detector Laboratory

  • Central: Technical Design, Manufacturing, Electronics, SE, Detector Lab,

Experiment Data Processing, Network & Storage, Neutron Optics, Survey

Recent and ongoing Projects

  • New Cold Source, NG Upgrade, FLEXX, NEAT, HFM, ESS-Design
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012 20

Acknowledgements

Thanks to all colleagues from Service group Instrument Mechanics Service group Instrument Electronics Sample Environment dept. Experiment Data Processing dept. Technical Design dept. Manufacturing dept. Electronics group Detector Laboratory Neutron Optics group Operation Reactor dept. Neutron Guide Upgrade project team FLEXX-Upgrade project team NEAT-Upgrade project team High Field Magnet project team ESS Design-Update-Phase teams ⁞ Thanks for providing with information:

  • K. Kiefer (SE)
  • L. Drescher (Technical Design)
  • Th. Wilpert (Detectors)

O.P. Sauer (Experiment Data Processing)

  • St. Welzel (Reactor)
  • Th. Krist (Neutron Guide Upgrade)
  • K. Habicht (FLEXX, ESS Design-Update)
  • M. Russina (NEAT)
  • P. Smeibidl (High Field Magnet)
  • H. Ehmler (Document Management Syst.)
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Axel Rupp, Design and Engineering of Neutron Instruments Workshop, Rutherford Appleton Laboratory, Didcot, UK – 17-19 September 2012