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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

FPUStruts, Filter Wheel, Calibration Source

D.Kampf, Dr. Roland Graue

Kayser-Threde GmbH

FPU Struts, Filter Wheel, Calibration Source

fpu suspension
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

photoconductor detector suspension
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

filter wheel assembly design
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

filter wheel cryotorquer drive
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

fw assembly
FW Assembly

FPU Struts, Filter Wheel, Calibration Source

fw bearing housing
FW Bearing / Housing

FPU Struts, Filter Wheel, Calibration Source

cross section of the motor
Cross section of the motor

FPU Struts, Filter Wheel, Calibration Source

slide10

Part-winding 1

(Phase 1)

Part-winding 2

(Phase 2)

Arrangement of the coils

FPU Struts, Filter Wheel, Calibration Source

slide11

Principle of driving

FPU Struts, Filter Wheel, Calibration Source

slide12

Technical description

FPU Struts, Filter Wheel, Calibration Source

filter wheel cryotorquer drive cont d
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

cryotorquer breadboard
Cryotorquer Breadboard

FPU Struts, Filter Wheel, Calibration Source

filter wheel torquer status
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

filter wheel assembly
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

flow diagram for q tests cryomotor
Flow diagram for Q-tests cryomotor

FPU Struts, Filter Wheel, Calibration Source

calibration sources
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

assembly
Assembly

FPU Struts, Filter Wheel, Calibration Source

baffle
Baffle

FPU Struts, Filter Wheel, Calibration Source

pt500 1000 suspension
PT500/1000 Suspension

FPU Struts, Filter Wheel, Calibration Source

calibration source design
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

icd status
ICD Status

FPU Struts, Filter Wheel, Calibration Source