PACS IBDR 27/28 Feb 2002 PACS FPU FPU R. Graue, D. Kampf Kayser-Threde

PACS IBDR 27/28 Feb 2002 PACS FPU Primary Structure Photometer housing Bolometer housing Red Spectrometer Connector Panel Collimator housing Top Optics housing Spectrometer housing Chopper Cover FPU foot 1 axis FPU foot 2 axis Blue Spectrometer Connector Panel 2 K Feed Thru Alignment Cube Entrance to FPU Field Mirror for Spectrometer 4 K Thermal Strap

PACS IBDR 27/28 Feb 2002 PACS FPU Primary Structure (continued) Collimator housing FPU foot 3 axis 4 K Thermal Strap Grating Connector Panel Grating Cover (external mounting of grating) Blue Spectrometer Connector Panel 2 K Feed Thru Photometer housing Bolometer housing Alignment Cube Top Optics housingChopper Cover Field Mirror External Mirror Fixation Peri 1 External Mirror Fixation B_Mirror_2 External Mirror Fixation

PACS IBDR 27/28 Feb 2002 PACS FPU Primary Structure (continued) Bolometer housing Collimator housing Spectrometer Cover Blue Spectrometer Connector Panel Red Spectrometer Connector Panel FPU foot 1 axis FPU foot 3 axis Photometer housing Grating Connector Panel Grating Cover (external mounting of grating) FPU foot 2 axis

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Suspension

PACS IBDR 27/28 Feb 2002 PACS FPU Detector Struts Side/Iso View Fibre: T300 Resin:Ciba Geigy Araldit LY-3505 Hardener XP 3403

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Entrance Baffle

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Bottom view of TOP OPTICS Baffle are shown in brown 1st field stop Aperture Stop (complete closure of entrance compartment) Lyot stop for telescope secondary mirror edge Chopper: 2nd aperture stop Lyot stop for aperture stop (2nd Lyot stop) Closure of Entrance Optics (quasi 2nd field stop) Mirror FOLD 5

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Photometer housing seen from Top Optics Mirror FOLD 5 from Top Optics scetched 2nd Field Stop Focus Mirror (to Spectrometer ) Entrance to Photometer Focal planes of photometer Entrance to Slicer / Spectrometer

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Bottom view of Photometer housing (interface to bolometer) 4th aperture stop at conic baffle to thedetector arrays not shown Separation wall between red and blue compartment contains Dichroic beamsplitter (near 3rd aperture, not accessible) 3rd field stop (blue photometer) 3rd field stop (red photometer)

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Collimator housing Grating drive Grating

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Slicer seen from Photometer Focus Mirror scetched Entrance to slicer / spectrometer

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Slicer seen from collimator Area blocked by housing Beam to collimator Beam to spectrometer, exit from collimator

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Slicer internal view Focus mirror inside photometer To collimator To spectrometer

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Spectrometer seen from bottom Filter wheel Blue spectrometer detector Red spectrometer detector From slicer / collimator

PACS IBDR 27/28 Feb 2002 PACS FPU FPU Structure, Baffles and Straylight Spectrometer seen from bottom Filter wheel Blue spectrometer detector Red spectrometer detector

PACS IBDR 27/28 Feb 2002 PACS FPU 2K - Feed Through Design A: Outside sleeve B: Inside sleeve C: Cold finger D/E: Retainer ring 1/2 F: Muff G: Ring Fixation to housing aluminum CFRP Tubes CFRP Copper old Finger

PACS IBDR 27/28 Feb 2002 PACS FPU IR Coating Trade Off selection of baseline coating Material: Suede 3101 with glas beads (deep black, rough surface) Thickness (average):430µm Test verification BRDF and specular measurements (Delft University) liquid nitrogen test contamination test Outgasing tests (CVCM, TML) to be performed Problem: (particulates drop off) Solution: Update of procedure (brushing, intermediate drying, materials of layers)

PACS IBDR 27/28 Feb 2002 PACS FPU IR Coating - BRDF       

PACS IBDR 27/28 Feb 2002 PACS FPU IR Coating - Specular reflection 

PACS IBDR 27/28 Feb 2002 PACS FPU Design Envelope

PACS IBDR 27/28 Feb 2002 PACS FPU Optical Bench Interface

PACS IBDR 27/28 Feb 2002 PACS FPU Optical Beam Stay Out Envelope

PACS IBDR 27/28 Feb 2002 PACS FPU Design and MAIV Status of Structural Items Top Optics & Slicer manufacturing drawings completed Top Optics manufacturing in progress Collimator detailed design completed Bolometer & Spectrometer detailed design in progress CFRP Struts (Breadboard) under manufacturing Cleanroom set up in progress

PACS IBDR 27/28 Feb 2002 PACS FPU Documents Status –ICDs Chopper, FW, Calibration Source, Filters/Dichroics, Ga:Ga Detector, Grating: approved Bolometer, Distribution Boards: several open points under evaluation Cryogenic harness : approved External interface drawing: to be approved –Procurement specifications (structures, mirror, coating, screws/helicoils, Si -lens, emitter for CS, etc.) issued –AIV and functional/environmental test plan issued

PACS IBDR 27/28 Feb 2002 PACS FPU PA Activities Documents –PMP –CIDL –PA Plan –MIP/KIP plan –Inputs to FMECA Approval of procurement/manufacturing documentation/drawings Configuration Control

PACS IBDR 27/28 Feb 2002 PACS FPU MIP / KIP List Inspection of FW assembly (CQM/PFM) after functional and environmental verification testing at TTL Inspection of calibration source (CQM/PFM) after environmental and functional testing at MPE Inspection of coated mirrors (CQM/PFM) at KT (tbc) Substructure fit check inspection after manufacturing and coating of aluminium structure (STM/CQM/PFM) at KT Inspection of all distribution boards and harness after manufacturing and functional testing (CQM/PFM) at KT Functional performance verification after FPU alignment (CQM/PFM) at KT FPU performance inspection after vibration tests (CQM/PFM) at MPE

PACS IBDR 27/28 Feb 2002 PACS FPU SCHEDULE Manufacturing –STM/CQM primary/secondary structures thermal treatment /manufacturing /IR coating sequentially to be completed until 7/02 –CQM/PFM optical components to be completed until 6/02 –STM/CQM/PFM CFRP struts and 2 K feed through material test program in progress, manufacturing to be completed until 5/02 –Filter Wheel BB completed, CQMs hardware partly manufactured, tests completed until 8/02 –Calibration source BB component tests in progress, CQMs hardware delivery until 7/02 (tbc) –Distribution board manufacturing to be completed 12/02 (tbc - CPP delivery on critical path) AIV –STM in 7/02 –CQM from 7/02 to 4/03

PACS IBDR 27/28 Feb 2002 PACS FPU Optical Mirrors

PACS IBDR 27/28 Feb 2002 PACS FPU

PACS IBDR 27/28 Feb 2002 PACS FPU

PACS IBDR 27/28 Feb 2002 PACS FPU

PACS IBDR 27/28 Feb 2002 PACS FPU

PACS IBDR 27/28 Feb 2002 PACS FPU Status of Optical Mirrors Manufacturing drawings completed (incl. Alignment mirrors) Coarse manufacturing of CQM/PFM completed Thermal treatment completed Optical surface finish in progress Cryogenic pretests (thermo-optical behavior) of mirror samples completed

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Tasks Optical axis of telescope to FPU (alignment cubes/mirrors) Top Optics with Calibration Sources and Chopper Slicer optics Spectrometer/Collimator optics with Grating Assembly Dummy, Dichroic, FW1, Ge:Ga Detectors Bolometer optics with Dichroic, FW2 Integration of bolometer assembly (CEA)

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan AKF at centre of the telescope secondary mirror

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan AKF and Laser assembly with top optics AKF centered at nominal position of telescope secondary mirror (real aperture) Top Optics side view Chopper Intermediate focal plane splitting between spectrometer and photometer section Internal aperture stop

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan Centering alignment of bolometer Intermediate focal plane splitting between spectrometer and photometer section Field Mirror Peri 1 B_Mirror_2

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan Bolometer alignment B_Mirror_2 B_Mirror_1 Blue Bolometer focal plane Filter Wheel Bolometer

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan Slicer Optics alignment Focus Mirror at intermidate focal plane

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan Setup for slicer element alignment

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan Collimator Alignment

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Plan Red and Blue spectrometer channel alignment

PACS IBDR 27/28 Feb 2002 PACS FPU Alignment Status Updated Alignment plan issued Alignment procedure engineering in progress Preliminary OGSE procurement plan CVSE procurement in progress (cryostat)

PACS IBDR 27/28 Feb 2002 PACS FPU OGSE Autocollimation telescope Optical mounts 4 x CCD array with optics PC with framegrabber 2 x alignment telescope 4 x HeNe Laser (laser diode) Set of pinholes from nickel with LED's (point sources) Support structure for pinholes Masks for mirrors (plexiglas with 3 point orientation to the front surface) Scatter-plates Lateral translation stages 2 x Rotary table Alignment mirrors during alignment (temporary) Alignment mirrors for FPFPU alignment

PACS IBDR 27/28 Feb 2002 PACS FPU Structural and Thermal Analysis

PACS IBDR 27/28 Feb 2002 PACS FPU Filter Wheels and Calibration Sources

PACS IBDR 27/28 Feb 2002 PACS FPU FW Design Flip angle Precision of end stop Power dissipation per position change Transition time Operating temperature Warming of parts within view of detector Duty cycle Life time 0° > 180° > 360° (Optionally 90° & 270°) 30 arcmin < 50 mWs  5 sec (average) K < 0.1 K (filter wheel assembly requirement, only) 1 per 30 min.  cycles

PACS IBDR 27/28 Feb 2002 PACS FPU Filter Wheel Assembly

PACS IBDR 27/28 Feb 2002 PACS FPU Filter Wheel Assembly (side view)

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source - Surface with Exit Aperture

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source – homogeneity integrated over aperture –5 mK temperature stability –50 K K thermal range –power dissipation at 100 K < 1.5 mW

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source - Scatter Mirror and Source Calibration Source Sphere 4 K, high scatter surface with high reflectivity Scatter Plate 4 K Emitter at 100 K 2 x PT500 Emitter fixation Si Lens Aperture

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source with Scatter Plate

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source Baseline Design –Emitter : 2 x PT500 resistor for heating and emission with 4 wire setup (measurement current used for heating) –Emitter size: Volume :6.4mm x 5.2 mm x 6 mm Weight:550 mg Surface:205 mm² (tbc) Heat capacity:0.45 J/K (tbc)

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source - Feet Design 4 Feet 24 mm x 0.25 mm x 0.25 mm 16 layers of GFRP Interglas Style 106 (quasiistropic) Coating 2 x Ti, 200 nm thickness reduction of feet emission increase of thermal conductance electrical connection to emitter increase of resistance 3 x stiffening rings to prevent buckling (not shown) 0.4 mW feet conductance 1 mW emitter radiance

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source Previous emitter size

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source - Specular Reflection SCATTERSURFACE GOLD COATED Reflectivity > 0.992

PACS IBDR 27/28 Feb 2002 PACS FPU Calibration Source - BRDF Measurements SCATTERSURFACE GOLD COATED Reflectivity > 0.992

PACS IBDR 27/28 Feb 2002 PACS FPU Distribution Boards and FPU Harness Concept

PACS IBDR 27/28 Feb 2002 PACS FPU

PACS IBDR 27/28 Feb 2002 PACS FPU Harness layout due to equal length of all detector modules

PACS IBDR 27/28 Feb 2002 PACS FPU Rigid-flex boards Material –PCB: FR4 –Flexible Harness: Polyimide Layout shall be designed according to CNES QFT/SP.0019 Connectors: Cannon MDM B.... FR139 Capacitors: WIMA MKS 6,8 micro Farad, 50 VDC, 30 VAC Resistors: RNC 55 according to ESA SCC (TBC) Distribution Board - Design

PACS IBDR 27/28 Feb 2002 PACS FPU Circuit diagram completed, except some open points ICD update in preparation for release Capacitors are ordered, delivery time: (tbc) Connectors will be delivered on , except later ordered connectors Test board is manufactured Cryogenic test of test board planned in cw 8 Distribution Board - Status

PACS IBDR 27/28 Feb 2002 PACS FPU Grounding of distribution board to housing (tbd by MPE) Characteristic data of some resistance Release of circuit diagram Distribution Board - Open Points

PACS IBDR 27/28 Feb 2002 PACS FPU PCB layout test against Gerber data (inspection protocol) Incoming inspection according to inhouse procedures Pin to pin continuity Insulation Visual inspection (components, bonding points) Distribution Board - Verification

PACS IBDR 27/28 Feb 2002 PACS FPU -Thermal cycling (tbc) of the boards -Microscopic tests (e.g. cracks) -Cross talk ohmic resistance test -Use of ESA qualified capacitors and resistors -Functional test with full detectors chain (i.e. detectors, read out electronic, etc.) at MPE Distribution Board - Verification

PACS IBDR 27/28 Feb 2002 PACS FPU

PACS IBDR 27/28 Feb 2002 PACS FPU Harness - Design Cable – shielded, jacketed multicore cable; Gore SPL 41-28, 4 cores –Conductor: silver plated copper –Insulation: polyimide Connectors: Cannon MDM connectors B

PACS IBDR 27/28 Feb 2002 PACS FPU Cable ordered delivery time: end of February Manufacturing of harness at Cannon delivery time: about 12 weeks Harness - Procurement Status

PACS IBDR 27/28 Feb 2002 PACS FPU Heater wire –Type not yet defined –planned 4 core brass cable AWG 38 with stainless steel shield according to GSC 6769 –Request for Quotation submitted to Cannon –No confirmation from Cannon concerning the use of AWG 38 cable Harness - Open Points