Experimental Facilities DivisionOak Ridge SNS INSTRUMENTS OVERVIEW R. K. Crawford Instrument Systems Senior Team Leader September 10, 2004 HYSPEC IDT Meeting

Experimental Facilities DivisionOak Ridge 2 The Spallation Neutron Source The SNS will begin operation in 2006 At 1.4 MW it will be ~8x ISIS, the world’s leading pulsed spallation source The peak neutron flux will be ~20–100x ILL SNS will be the world’s leading facility for neutron scattering It will be a short drive from HFIR, a reactor source with a flux comparable to the ILL

Experimental Facilities DivisionOak Ridge 3 Target Region Within Core Vessel Core Vessel water cooled shielding Core Vessel Multi-channel flange Outer Reflector Plug Target Target Module with jumpers Moderators

Experimental Facilities DivisionOak Ridge 4 Instrument Layout CANADA Unfunded SNS UNIV SING NUC-PH 1B - Disordered Mat’ls Diffractometer – DOE Funded (SING) – Commission Backscattering Spectrometer – SNS Funded – Commission High Pressure Diffractometer – DOE Funded (SING) – Commission A - Magnetism Reflectometer – SNS Funded – Commission B - Liquids Reflectometer – SNS Funded – Commission Cold Neutron Chopper Spectrometer – IDT DOE Funded – Commission Wide Angle Chopper Spectrometer – IDT DOE Funded – Commission High Resolution Chopper Spectrometer – DOE Funded (SING) – Commission Fundamental Physics Beamline – IDT DOE Funded – Commission TBD 11A - Powder Diffractometer – SNS Funded – Commission Single Crystal Diffractometer – DOE Funded (SING) – Commission Engineering Diffractometer – IDT CFI Funded – Commission SANS – SNS Funded – Commission B - Hybrid Spectrometer – DOE Funded (SING) – Commission – Spin Echo

Experimental Facilities DivisionOak Ridge 5 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

Experimental Facilities DivisionOak Ridge 6 Instrument Installation has begun! 13 th March

Experimental Facilities DivisionOak Ridge 7 Installation

Experimental Facilities DivisionOak Ridge 8 Core Vessel Inserts Core vessel inserts in various stages of fabrication and assembly

Experimental Facilities DivisionOak Ridge 9 Data Acquisition System Detectors Neutron Choppers Sample Environment Analysis Software SNS Component Development/Support

Experimental Facilities DivisionOak Ridge 10 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 Preprocessor Cluster Detector Electronics Detectors Control Computer File Server Fire Wall Satellite Computers: Chopper, Sample Environment etc. Chopper Interface Accelerator Interface Real Time Soft Real Time External Interfaces

Experimental Facilities DivisionOak Ridge 11 Detector Selections SEQUOIA Spectrometer –120 cm x 2.5 cm 3 He LPSDs CNCS Spectrometer – 3 He LPSDs SANS –100 cm x 0.8 cm 3 He LPSDs, 1 m x 1 m array Powder Diffractometer and VULCAN –LiF/ZnS scintillator screens coupled with wavelength shifting fibers and phototubes SCD and MANDI –Anger camera scintillation detector SNAP –Anger camera scintillation detector Reflectometers (2) –BNL 20 cm x 20 cm 3 He Area PSDs Backscattering Spectrometer –15 cm x 1.3 cm 3 He LPSDs ARCS Spectrometer –100 cm x 2.5 cm 3 He LPSDs

Experimental Facilities DivisionOak Ridge 12 Neutron Choppers Fabrication and assembly of T0 chopper for powder diffractometer underway. 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. BW Choppers for Backscattering Spect.

Experimental Facilities DivisionOak Ridge 13 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

Experimental Facilities DivisionOak Ridge 14 Sample Environment Activities – cont’d 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

Experimental Facilities DivisionOak Ridge 15 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

Experimental Facilities DivisionOak Ridge Present Experimental Facilities Organization

Experimental Facilities DivisionOak Ridge 17 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