FPU
This presentation is the property of its rightful owner.
Sponsored Links
1 / 72

FPU PowerPoint PPT Presentation


  • 118 Views
  • Uploaded on
  • Presentation posted in: General

FPU. R. Graue, D. Kampf Kayser-Threde. Primary Structure. Field Mirror for Spectrometer. Collimator housing. Photometer housing. Chopper Cover. Alignment Cube. Blue Spectrometer Connector Panel. Top Optics housing. 4 K Thermal Strap. Entrance to FPU. Bolometer housing. 2 K

Download Presentation

FPU

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Fpu

FPU

R. Graue, D. Kampf

Kayser-Threde

PACS FPU


Primary structure

Primary Structure

Field Mirror for

Spectrometer

Collimator housing

Photometer housing

Chopper Cover

Alignment Cube

Blue Spectrometer

Connector Panel

Top Optics housing

4 K Thermal Strap

Entrance to

FPU

Bolometer

housing

2 K

Feed Thru

FPU foot

2 axis

Red Spectrometer

Connector Panel

Spectrometer housing

FPU foot

1 axis

PACS FPU


Primary structure continued

Primary Structure (continued)

Alignment Cube

Top Optics housing

Chopper Cover

Field Mirror

External Mirror Fixation

Peri 1

External Mirror Fixation

Collimator housing

B_Mirror_2

External Mirror Fixation

Photometer housing

2 K

Feed Thru

4 K Thermal Strap

Grating

Connector Panel

Bolometer

housing

Blue Spectrometer

Connector Panel

FPU foot

3 axis

Grating Cover

(external mounting of grating)

PACS FPU


Primary structure continued1

Primary Structure (continued)

FPU foot

1 axis

Red Spectrometer

Connector Panel

Spectrometer Cover

FPU foot 2 axis

Bolometer

housing

Blue Spectrometer

Connector Panel

Collimator housing

FPU foot

3 axis

Grating

Connector Panel

Photometer housing

Grating Cover

(external mounting of grating)

PACS FPU


Fpu suspension

FPU Suspension

PACS FPU


Detector struts side iso view

Detector Struts Side/Iso View

Fibre: T300

Resin:Ciba Geigy

Araldit LY-3505

Hardener XP 3403

PACS FPU


Fpu structure baffles and straylight

FPU Structure, Baffles and Straylight

Entrance Baffle

PACS FPU


Fpu structure baffles and straylight1

FPU Structure, Baffles and Straylight

Bottom view of TOP OPTICS

1st field stop

Aperture Stop

(complete closure of

entrance compartment)

Lyot stop for telescope secondary mirror edge

Baffle are shown in brown

Chopper: 2nd aperture stop

Lyot stop for aperture stop

(2nd Lyot stop)

Mirror FOLD 5

Closure of Entrance Optics

(quasi 2nd field stop)

PACS FPU


Fpu structure baffles and straylight2

FPU Structure, Baffles and Straylight

Photometer housing seen from Top Optics

Entrance to Slicer / Spectrometer

Focus Mirror

(to Spectrometer)

2nd Field Stop

Mirror FOLD 5 from Top Optics scetched

Entrance to Photometer

Focal planes of photometer

PACS FPU


Fpu structure baffles and straylight3

FPU Structure, Baffles and Straylight

Bottom view of Photometer housing (interface to bolometer)

4th aperture stop at conic baffle to thedetector arrays not shown

3rd field stop (blue photometer)

Separation wall between red and blue compartment

contains Dichroic beamsplitter

(near 3rd aperture, not accessible)

3rd field stop (red photometer)

PACS FPU


Fpu structure baffles and straylight4

FPU Structure, Baffles and Straylight

Collimator housing

Grating drive

Grating

PACS FPU


Fpu structure baffles and straylight5

FPU Structure, Baffles and Straylight

Slicer seen from Photometer

Entrance to slicer / spectrometer

Focus Mirror scetched

PACS FPU


Fpu structure baffles and straylight6

FPU Structure, Baffles and Straylight

Slicer seen from collimator

Area blocked by housing

Beam to collimator

Beam to spectrometer, exit from collimator

PACS FPU


Fpu structure baffles and straylight7

FPU Structure, Baffles and Straylight

Slicer internal view

Focus mirror inside photometer

To collimator

To spectrometer

PACS FPU


Fpu structure baffles and straylight8

FPU Structure, Baffles and Straylight

Spectrometer seen from bottom

Filter wheel

Red spectrometer detector

Blue spectrometer detector

From slicer / collimator

PACS FPU


Fpu structure baffles and straylight9

FPU Structure, Baffles and Straylight

Spectrometer seen from bottom

Blue spectrometer detector

Red spectrometer detector

Filter wheel

PACS FPU


2k feed through design

2K - Feed Through Design

Fixation to housing

aluminum

CFRP Tubes

CFRP

A: Outside sleeve

B: Inside sleeve

C: Cold finger

D/E: Retainer ring 1/2

F: Muff

G: Ring

Copper old Finger

PACS FPU


Ir coating

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 FPU


Ir coating brdf

IR Coating - BRDF

PACS FPU


Ir coating specular reflection

IR Coating - Specular reflection

PACS FPU


Design envelope

Design Envelope

PACS FPU


Optical bench interface

Optical Bench Interface

PACS FPU


Optical beam stay out envelope

Optical Beam Stay Out Envelope

PACS FPU


Design and maiv status of structural items

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 FPU


Documents status

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 FPU


Pa activities

PA Activities

  • Documents

    • PMP

    • CIDL

    • PA Plan

    • MIP/KIP plan

    • Inputs to FMECA

  • Approval of procurement/manufacturing documentation/drawings

  • Configuration Control

PACS FPU


Mip kip list

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 FPU


Schedule

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 FPU


Optical mirrors

Optical Mirrors

PACS FPU


Fpu

PACS FPU


Fpu

PACS FPU


Fpu

PACS FPU


Fpu

PACS FPU


Status of optical mirrors

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 FPU


Alignment plan

Alignment Plan

PACS FPU


Alignment tasks

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 FPU


Alignment plan akf at centre of the telescope secondary mirror

Alignment PlanAKF at centre of the telescope secondary mirror

PACS FPU


Alignment plan akf and laser assembly with top optics

Alignment PlanAKF and Laser assembly with top optics

AKF centered at

nominal position of telescope secondary mirror

(real aperture)

Internal aperture stop

Top Optics

side view

Chopper

Intermediate focal plane

splitting between spectrometer

and photometer section

PACS FPU


Alignment plan centering alignment of bolometer

Alignment PlanCentering alignment of bolometer

Intermediate focal plane

splitting between spectrometer

and photometer section

Field Mirror

Peri 1

B_Mirror_2

PACS FPU


Alignment plan bolometer alignment

Alignment PlanBolometer alignment

B_Mirror_1

B_Mirror_2

Filter Wheel

Bolometer

Blue Bolometer focal plane

PACS FPU


Alignment plan slicer optics alignment

Alignment PlanSlicer Optics alignment

Focus Mirror at

intermidate focal plane

PACS FPU


Alignment plan setup for slicer element alignment

Alignment PlanSetup for slicer element alignment

PACS FPU


Alignment plan collimator alignment

Alignment PlanCollimator Alignment

PACS FPU


Alignment plan red and blue spectrometer channel alignment

Alignment PlanRed and Blue spectrometer channel alignment

PACS FPU


Alignment status

Alignment Status

  • Updated Alignment plan issued

  • Alignment procedure engineering in progress

  • Preliminary OGSE procurement plan

  • CVSE procurement in progress (cryostat)

PACS FPU


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 FPU


Structural and thermal analysis

Structural and Thermal Analysis

PACS FPU


Filter wheels and calibration sources

Filter Wheels and Calibration Sources

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)

3-300 K

< 0.1 K (filter wheel assembly requirement, only)

1 per 30 min.

 20000 cycles

FW Design

PACS FPU


Filter wheel assembly

Filter Wheel Assembly

PACS FPU


Filter wheel assembly side view

Filter Wheel Assembly (side view)

PACS FPU


Calibration source surface with exit aperture

Calibration Source - Surface with Exit Aperture

PACS FPU


Calibration source

Calibration Source

  • 0.0005 homogeneity integrated over aperture

  • 5 mK temperature stability

  • 50 K - 100 K thermal range

  • power dissipation at 100 K < 1.5 mW

PACS FPU


Calibration source scatter mirror and source

Calibration Source - Scatter Mirror and Source

Si Lens

Aperture

Calibration Source Sphere

4 K, high scatter surface with high reflectivity

Scatter Plate

4 K

Emitter at 100 K

2 x PT500

Emitter fixation

PACS FPU


Calibration source with scatter plate

Calibration Source with Scatter Plate

PACS FPU


Calibration source1

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 mmWeight:550 mgSurface:205 mm² (tbc)Heat capacity:0.45 J/K (tbc)

PACS FPU


Calibration source feet design

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 FPU


Calibration source2

Calibration Source

Previous emitter size

PACS FPU


Calibration source specular reflection

Calibration Source - Specular Reflection

SCATTERSURFACE GOLD COATED

Reflectivity > 0.992

PACS FPU


Calibration source brdf measurements

Calibration Source - BRDF Measurements

SCATTERSURFACE GOLD COATED

Reflectivity > 0.992

PACS FPU


Distribution boards and fpu harness concept

Distribution Boards and FPU Harness Concept

PACS FPU


Fpu

PACS FPU


Fpu

Harness layout due to equal length of all detector modules

PACS FPU


Distribution board design

Distribution Board - Design

  • Rigid-flex boards

  • Material

    • PCB: FR4

    • Flexible Harness: Polyimide

  • Layout shall be designed according to CNES QFT/SP.0019

  • Connectors: Cannon MDM 3401029 01B .... FR139

  • Capacitors: WIMA MKS 6,8 micro Farad, 50 VDC, 30 VAC

  • Resistors: RNC 55 according to ESA SCC 40001 001 (TBC)

PACS FPU


Distribution board status

Distribution Board - Status

  • Circuit diagram completed, except some open points

  • ICD update in preparation for release

  • Capacitors are ordered, delivery time: 31.10.02 (tbc)

  • Connectors will be delivered on 30.03.02, except later ordered connectors

  • Test board is manufactured

  • Cryogenic test of test board planned in cw 8

PACS FPU


Distribution board open points

Distribution Board - Open Points

  • Grounding of distribution board to housing (tbd by MPE)

  • Characteristic data of some resistance

  • Release of circuit diagram

PACS FPU


Distribution board verification

Distribution Board - Verification

  • PCB layout test against Gerber data (inspection protocol)

  • Incoming inspection according to inhouse procedures

  • Pin to pin continuity

  • Insulation

  • Visual inspection (components, bonding points)

PACS FPU


Distribution board verification1

Distribution Board - Verification

  • 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

PACS FPU


Fpu

PACS FPU


Harness design

Harness - Design

  • Cable

    • shielded, jacketed multicore cable; Gore SPL 41-28, 4 cores

    • Conductor: silver plated copper

    • Insulation: polyimide

  • Connectors: Cannon MDM connectors 3401029 01B

PACS FPU


Harness procurement status

Harness - Procurement Status

  • Cable ordered

  • delivery time: end of February

  • Manufacturing of harness at Cannon

  • delivery time: about 12 weeks

PACS FPU


Harness open points

Harness - Open Points

  • 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

PACS FPU


  • Login