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FPU Struts, Filter Wheel, Calibration Source

FPU Struts, Filter Wheel, Calibration Source. D.Kampf, Dr. Roland Graue Kayser-Threde GmbH. FPU Suspension. Mechanical/thermal Decoupling : Isostatic Suspension with 6 Struts X-Translation, Rotation about Z : 3 Struts Z/Y - Translation and Rotation : 1 Strut/2 Struts Dimensions:

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FPU Struts, Filter Wheel, Calibration Source

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  1. FPUStruts, Filter Wheel, Calibration Source D.Kampf, Dr. Roland Graue Kayser-Threde GmbH FPU Struts, Filter Wheel, Calibration Source

  2. FPU Suspension • Mechanical/thermal Decoupling : Isostatic Suspension with 6 Struts • X-Translation, Rotation about Z : 3 Struts • Z/Y - Translation and Rotation : 1 Strut/2 Struts • Dimensions: • Cross Section/Length Ratio : 50 mm2/70 mm • Material (Baseline) : Stainless Steel for Struts and Fittings • Mass (w/o contingency) : 1.5 kg FPU Struts, Filter Wheel, Calibration Source

  3. Photoconductor Detector Suspension • Mechanical/Thermal Decoupling: Isostatic Suspension with 6 Rods • X-Translation, Rotation about X : 3 Struts • Z/Y - Translation and Rotation : 2 Struts/1 Strut • Dimensions: • Cross Section : 13 x 2 mm2 • Length : approx. 40 mm excl. Fittings • Material (baseline) : UD Kevlar 49 (0o -Orientation) : Epoxi Matrix : Ti 6 Al - 4V Fittings • Mass (w/o Contingency) : 0.42 kg FPU Struts, Filter Wheel, Calibration Source

  4. Filter Wheel Assembly Design • Unlimited Angle of Rotation • 2 Preloaded, Dry, Gold coated Bearings (GRW) • Rotor for 2 (optional 4) filters • Cryotorquer Drive • Total Mass: 0.580 kg • Rotor Inertia: 0.11 gm2 • Dynamic Straylight Baffle FPU Struts, Filter Wheel, Calibration Source

  5. Filter Wheel Cryotorquer Drive • Brushless Motor with Magnets Positioned at the Rotor • Cryotorquer Drive Design: • 12 Poles • 24 Magnets (Samarium-Cobalt) • 2 Phases (Each Redundant) • 12 x 180 Cu-Coil Windings • Stator with 4 Hall - Sensors, Two for Each of the Coil Package FPU Struts, Filter Wheel, Calibration Source

  6. FW Assembly FPU Struts, Filter Wheel, Calibration Source

  7. FW Bearing / Housing FPU Struts, Filter Wheel, Calibration Source

  8. Cross section of the motor FPU Struts, Filter Wheel, Calibration Source

  9. FPU Struts, Filter Wheel, Calibration Source

  10. Part-winding 1 (Phase 1) Part-winding 2 (Phase 2) Arrangement of the coils FPU Struts, Filter Wheel, Calibration Source

  11. Principle of driving FPU Struts, Filter Wheel, Calibration Source

  12. Technical description FPU Struts, Filter Wheel, Calibration Source

  13. Filter Wheel Cryotorquer Drive - Cont‘d • Temperature Range (op.): 3 - 313 K • Rotor Positioning by One Hall Sensor (Red.) and One Magnet at Each Stop (Powerless Dormitory Mode During Measurement Time) FPU Struts, Filter Wheel, Calibration Source

  14. Cryotorquer Breadboard FPU Struts, Filter Wheel, Calibration Source

  15. Filter Wheel Torquer Status • Breadboard Tested at LHe-Temperatures • Torquer Constant: 0.3 Nm/A (Per Stator Package) • Operational Current: 0.25 A (Per Phase and Stator Package) • Power Dissipation: <10 mWs (per Position Change) : 25 mW (max) FPU Struts, Filter Wheel, Calibration Source

  16. Filter Wheel Assembly Mass: • Stator : 75 g • Rotor : 265 g • Bearings : 20 g • Filter Wheel : 100 g • Mechanical Support : 120 g _________________________________________________________ Total (w/o Contigency) : 580 g FPU Struts, Filter Wheel, Calibration Source

  17. Flow diagram for Q-tests cryomotor FPU Struts, Filter Wheel, Calibration Source

  18. Calibration Sources • Outer Diameter : 50 mm • Aperture Diameter : 12 mm • Temperature : 90 - 115 K • Long Term Stability : 25 mK (13 bit Resolution) • Mass (w/o contingency) : 0.14 kg (2) FPU Struts, Filter Wheel, Calibration Source

  19. Assembly FPU Struts, Filter Wheel, Calibration Source

  20. Baffle FPU Struts, Filter Wheel, Calibration Source

  21. PT500/1000 Suspension FPU Struts, Filter Wheel, Calibration Source

  22. Calibration Source Design • Redundant Heat Source and Temperature Sensor (PT 100/ PT 500 tbc), 4 wire method • Aluminum Semispheres Coated with Highly Reflective Surface (Ni, Gold) • Highly Reflective Scatter Plate (Ni, Gold) with 200 µm rms Surface Roughness • Collimating Source Mirrors to Increase the Flux Homogeneity FPU Struts, Filter Wheel, Calibration Source

  23. ICD Status FPU Struts, Filter Wheel, Calibration Source

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