SNS INSTRUMENTS OVERVIEW

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SNS INSTRUMENTS OVERVIEW
HYSPEC IDT Meeting

• R. K. Crawford
• Instrument Systems Senior Team Leader

September 10, 2004
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The Spallation Neutron Source

• The SNS will begin operation in 2006
• At 1.4 MW it will be 8x ISIS, the worlds
  leading pulsed spallation source
• The peak neutron flux will be 20100x ILL
• SNS will be the worlds leading facility for
  neutron scattering
• It will be a short drive from HFIR, a reactor
  source with a flux comparable to the ILL

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Target Region Within Core Vessel
Target Module with jumpers
Outer Reflector Plug
Target
Moderators
Core Vessel water cooled shielding
Core Vessel Multi-channel flange
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Instrument Layout
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Instrument Status

• Final design review for 5 SNS Project instruments
  Sept 28-Oct 1
• Installation has started
• Evacuated scattering tank for backscattering
  spectrometer
• Core vessel inserts
• First 3 ready for commissioning April 2006
• CNCS and ARCS progress review held in August
  both scheduled for completion by end of FY2006
• SNAP and SEQUOIA preliminary design review held
  in May both currently undergoing baseline
  review and scheduled for completion in 2008
• Other instruments in various stages of design

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Instrument Installation has begun!
13th March
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Installation
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Core Vessel Inserts
Core vessel inserts in various stages of
fabrication and assembly
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SNS Component Development/Support

• Data Acquisition System
• Detectors
• Neutron Choppers
• Sample Environment
• Analysis Software

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Data Acquisition

• Basic hardware and software components for data
  acquisition all exist in prototype form. System
  design is standard to all instruments.
• Integrated system demonstrated provided at April
  EFAC meeting

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Detector Selections
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Neutron Choppers

• Fabrication and assembly of T0 chopper for powder
  diffractometer underway.

BW Choppers for Backscattering Spect.

• Five 60-Hz bandwidth choppers have been delivered
  by Astrium, and have completed testing in the
  chopper lab at Argonne.

• Second procurement for 60-Hz bandwidth choppers
  has been awarded to Revolve. These will be
  magnetic bearing choppers.

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Sample Environment Activities

• Standards
• Documented standards for sample environment
  mechanical interfaces to instruments
• Communication protocols developed and
  standardized
• Functioning communication system tested
• Prototype development
• Procuring several equipment items to develop
  sample holders, cryostat tails, etc
• SBIR/STTR with Containerless Research, Inc to
  develop automated sample changing at low and high
  temperatures
• Developing rapid-change refrigerator in
  collaboration with Penn State

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Sample Environment Activities contd

• Basic suite of general sample environment
  equipment will be procured in FY06-FY07 using
  operating budget
• Inventory will be adequate to meet all needs for
  standard sample environments
• Operating staff adequate to support needs for all
  operating instruments will be ramped up beginning
  in FY2005
• Working with user groups to identify needs and
  pursue development of equipment for specialized
  sample environments
• White paper and draft policy on magnetic field
  interference issues
• Self-compensated high-field magnets

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Analysis Software

• SNS is assuming an active role in the development
  of data analysis software
• The NESSI workshop to document requirements for
  such software was held at SNS October 13-15, 2003
• Draft requirements document prepared
• SNS team leader for scientific computation (Steve
  Miller) on board
• Preliminary implementation plan prepared
• Extensive international collaboration
• Part of team is already at work

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Present Experimental Facilities Organization
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Summary

• 16 instruments in various stages of design,
  procurement, and installation (5 of them in SING
  Project)
• Common components infrastructure development is
  active data acquisition, detectors, choppers,
  sample environment, analysis software
• Starting to change staffing mix to support
  installation and operation
• First instruments begin commissioning in 2006