Instrument Development Test Station at HFIR CG1 Lowell Crow, May 15, 2009

2Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Instrument Team Lee Robertson, Lowell Crow, Wai-Tung Hal Lee, Xin Tong, Mike Fleenor, Hassina Bilheux, Ducu Stoica, Akber Ismaili, Instrument Development Group, Neutron Facilities Development Division Engineering Support: Barton Bailey, Warren Sharp, Ken Chipley, Steve Rogers, Dave Conner Project Support/Installation/Neutronics: Doug Selby, Gary Lynn, Franz Gallmeier, HFIR Instrument Support, etc. Potential Users: Developers of neutron instruments and neutron instrument components

3Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Why do we need development beams? We need moderators, guides, filters, shutters, choppers, monochromators, analyzers, focusing devices, sample environments, detectors, shielding, etc. All need testing Can’t we use existing instruments? We do! Just a few examples from memory Detectors: HB-3, CG2, HB-2DS at HFIR; BL3, BL4B at SNS, QUIP at IPNS, Cf Sources Optics: ORELA, BL3, LENS Polarizers: HB-3A, BL4A, LENS Monochromators: HB1A, HB3, Missouri Sample Alignment: HB1A This is difficult to schedule on busy, oversubscribed user instruments

4Managed by UT-Battelle for the U.S. Department of Energy Presentation_name This has been going on a long time First Prototype Neutron Diffractometer -- Wollan and Shull 1946 From C. G. Shull, Rev. Mod. Phys. Vol. 67, No. 4, 1995 Operational Powder Diffractometer at Graphite Reactor 1949

5Managed by UT-Battelle for the U.S. Department of Energy Presentation_name What do we need for development now? Variable time-of-flight beam for wavelength-dependent measurements and component timing tests Variable wavelength monochromatic beam for optics tests, material measurements, and imaging tests A thermal beam for aligning samples and preparing monochromators and analyzers A cold beam for development of polarization measurement techniques Having any of these available for development could help us

6Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Where could we put a Development Station at HFIR? HB-2D – 2004 MIRROR reflectometer detector test station CG-4A and CG-4B Fixed takeoff angles CG-4D Imagine “Future Development” Locations CG-1 Large area end station

7Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Where could we put a Development Station at SNS? – similar number of locations, higher cost

8Managed by UT-Battelle for the U.S. Department of Energy Presentation_name A closer look at CG1 CG1 guide on the HFIR Cold Source: large area (25 mm wide × 150 mm tall) high flux (4.2 × 10 9 n/cm 2 s) cutoff of about 1.6 Å. Guide Calculations by Ralph Moon (2001)

9Managed by UT-Battelle for the U.S. Department of Energy Presentation_name The Plan – divide the beam 4 beams for neutron instrument and component development: CG1A – SERGIS (Spin Echo – Resolved Grazing Incidence Scattering) prototype development CG1B – Utility Diffractometer, for sample alignment and monochromator development CG1C – Double Crystal Monochromatic beam for neutron imaging and component development CG1D – Chopper Time-of-Flight beam for component development

10Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Disk Chopper CG1A SERGIS Development CG1B Utility Diffractometer Monochromatic Imaging & Development Neutron Optics / Imaging Time-of-Flight CG1 Main Beam Monochromator / Chopper Shielding Enclosure

11Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Drawing showing monochromators and chopper in enclosure Upper 60 mm – graphite monochromators for SERGIS and Utility Diffractometer Lower 90 mm – double bounce plastically deformed Si (111) crystals for variable monochromatic beam Chopper (formerly used at GPPD at IPNS) for cold time-of-flight beam

12Managed by UT-Battelle for the U.S. Department of Energy Presentation_name CG1B Utility CG1 HFIR Cold Guide Hall CG1C Monochromatic Imaging/Development CG1D Time-of-Flight CG1 Floor Plan

13Managed by UT-Battelle for the U.S. Department of Energy Presentation_name CG1A: SERGIS Beamline: 4.22 Å, > 10 6 n/cm 2 s Hal Lee, Tony Tong Development of the SERGIS (Spin Echo Resolved Grazing Incidence Scattering) technique – use spin echo to measure scattering angles; already demonstrated at several labs -- with this flexible beamline, learn more about components and overall arrangement, possibly try SESANS or other SESAME techniques Collaborative experiments (Roger Pynn, Indiana, Wei-Ren Chen, ORNL)

14Managed by UT-Battelle for the U.S. Department of Energy Presentation_name CG1B: Utility Diffractometer 2.35 Å beam, ~10 7 n/cm 2 s Work with Triple Axis Group to develop a 2-axis diffractometer Sample alignment ( now takes time on busy inelastic instruments) Monochromator/analyzer crystal development Neutron camera development

15Managed by UT-Battelle for the U.S. Department of Energy Presentation_name CG1C: Monochromatic Development Beamline ( Å) Neutron component and technique development: Neutron imaging development Hassina Bilheux – effort to build components, experience, and community for VENUS development Focusing neutron optics: mirrors, capillary, magnetic Guide development and optimization of guides. Materials science study of component lifetime. 3 He polarization development. Detector development

16Managed by UT-Battelle for the U.S. Department of Energy Presentation_name CG1D: TOF/White Beam Development Beamline Development for pulsed source Energy-dependent techniques Focusing and beam transport. 3 He polarization development. Imaging development Low energy cross-section measurements Shielding development HB4 Cold Source characterization. Detector development

17Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Some 2-month old assembly pictures Inner box in the polarization lab (now moved to HFIR)

18Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Outer box delivery March 2009

19Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Outer box delivery March 2009

20Managed by UT-Battelle for the U.S. Department of Energy Presentation_name Status Today Instrument shutter – mounted, tested (mechanically and radiologically) Outer shield box – walls filled with lead, aligned and mounted in place Inner shield box – monochromator stages installed Secondary shutters – in fabrication Planning for installation of all parts needed to open C/D beams by start of HFIR cycle 422 (June 24)