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Instrument Development Test Station at HFIR CG1

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

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Instrument Development Test Station at HFIR CG1

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

  2. Instrument Team Lee Robertson, Lowell Crow, Wai-Tung Hal Lee, Xin Tong, Mike Fleenor, HassinaBilheux, DucuStoica, AkberIsmaili, 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

  3. 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

  4. 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

  5. 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

  6. Where could we put a Development Station at HFIR? “Future Development” Locations CG-1 Large area end station HB-2D – 2004 MIRROR reflectometer detector test station CG-4D Imagine CG-4A and CG-4B Fixed takeoff angles

  7. Where could we put a Development Station at SNS? – similar number of locations, higher cost

  8. A closer look at CG1 CG1 guide on the HFIR Cold Source: large area (25 mm wide × 150 mm tall) high flux (4.2 × 109 n/cm2 s) cutoff of about 1.6 Å. Guide Calculations by Ralph Moon (2001)

  9. 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

  10. CG1A SERGIS Development CG1B Utility Diffractometer Monochromatic Imaging & Development CG1 MainBeam Neutron Optics / Imaging Time-of-Flight Disk Chopper Monochromator / Chopper Shielding Enclosure

  11. 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

  12. CG1 Floor Plan HFIR Cold Guide Hall CG1B Utility CG1C Monochromatic Imaging/Development CG1A SERGIS CG1D Time-of-Flight CG1

  13. CG1A: SERGIS Beamline: 4.22 Å, > 106 n/cm2 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)

  14. CG1B: Utility Diffractometer 2.35 Å beam, ~107 n/cm2 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

  15. CG1C: Monochromatic Development Beamline (1.8-6.2Å) Neutron component and technique development: Neutron imaging development HassinaBilheux – 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. 3He polarization development. Detector development

  16. CG1D: TOF/White Beam Development Beamline Development for pulsed source Energy-dependent techniques Focusing and beam transport. 3He polarization development. Imaging development Low energy cross-section measurements Shielding development HB4 Cold Source characterization. Detector development

  17. Some 2-month old assembly pictures Inner box in the polarization lab (now moved to HFIR)

  18. Outer box delivery March 2009

  19. Outer box delivery March 2009

  20. 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)

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