PACS IIDR 01/02 Mar 2001 Instrument Interfaces1 PACS FPU Opto-mechanical Design Overview and...

Instrument Interfaces 1

PACS IIDR 01/02 Mar 2001

PACS FPU Opto-mechanical DesignPACS FPU Opto-mechanical DesignOverview and InterfacesOverview and Interfaces

J. SchubertMPE



Summary

• Overview on FPU- Technical Status– Optics– FPU Structure

• FPU- Interface Documentation and Design Status– Overview– Cryo Mechanics– s-Ge:Ga Detector Assemblies– Bolometer Unit



Overview - FPU Technical Status OPTICS

Design completed (local optimizations only)

Stray light analysis of critical

components performed (top optics)

Preliminary alignment plan established

Open Point

Telescope interface not frozen

Diffraction analysis continued



Overview - FPU Technical Status

FPU Structures

• Detailed design of:

Housing compartments and substructure Easily accessable subunits (chopper, grating,

bolometer…) Exchange of full compartments possible Excellent stray light suppression

FPU suspension (iso-static mounting)

Mirrors and mounts /procurement

Distribution boards, cabling configuration /procurement

Interfaces to subunits

• Detailed planning of manufacturing phase



Overview - FPU Technical Status

FPU Structures (cont.)

Points to be worked on

• Structural Analysis FPU Values for resonance amplification

• FPU Mass Budget Weight to be reduced

• Cannon ITT Connectors Connectors needs to be light tight



Overview: Status FPU Interfaces

All FPU interfaces are defined

Detailed interface requirements are worked out and documented in the Subunit Specifications

Detailed design of the interfaces is in good progress and its status is almost completely documented in the subunit ICDs

Points to be worked on Final vibration loads for the subunits needed Documentation status has to be adapted to the current

development status



Interfaces Cryo Mechanics

FPUOPTICS

GHe Level 1 (4.2K)

FPU Structure

MPA

MPE

CSL

KT

optical

nechanical

thermal

electricalMEC

Chopper

GratingF

ilte

r

Temperature S

Filter Wheel

Calibration S.Dis

trib

uti

on

Bo

ard



FPU - Cryo Mechanics Interface Status (I)

• Filter WheelDocuments: PACS-ME-RS-003

Black Body and Filter Wheel Requ. Spec. PACS-KT-ID-006

PACS FPU Filter Wheel ICD elect.

optical

control

cabling

Status I/F Design

Documents: PACS-ME-ID-003

Temperature Sensors ICD

elect.control

cabling

Status I/F Design

• Temperature Sensors



FPU - Cryo Mechanics Interface Status (II)

• Calibration SourcesDocuments: PACS-ME-RS-003

Black Body and Filter Wheel Requ.Spec. PACS-KT-ID-007

PACS FPU Calibration Sources ICD

opticalcablingcontrol

Status I/F Design

Documents: PACS-ME-RS-009

PACS Grating Assembly Requ. Spec. PACS-CL-ID-001

ICD Grating assembly – FPU PACS-CL-ID-002 Grating to DEC ICD

• Grating

elect.

Status I/F Designopticalmechan.cablingcontrol

elect.



FPU - Cryo Mechanics Interface Status (III)

• Chopper


Chopper Specification PACS-KT-ID-003

Chopper Interface Control Document PACS-MA-ID-001

PACS Chopper Electrical ICD

opticalcablingcontrol

Status I/F Design

Documents: PACS-ME-ID-004

Filters and Dichroics ICD

• Filters/Dichroics

elect.

Status I/F Designopticalmechan.

mechan.



Interfaces s-Ge:Ga Detector Assemblies

Red/BlueDEC

LHe Tank (1,7K)

CRE

FPUOPTICS

Dis

trib

utio

nB

oard

Photoconductor Housing

GHe Level 1 (4.2K)

FPU Structure

Detector Modules

IMEC

ANTEC

MPE

CSL

KT

optical

nechanical

thermal

electrical

Filt

er



s-Ge:Ga Detector Assemblies Interface Status


Spec. for the PACS CRE

PACS-NT-DS-004 PACS Detector Array Design Spec.

PACS-KT-ID-002 Ge-Detectors ICD(mech)

PACS-MA-ID-002

PACS Ge Detector Electrical ICD

optical

Status I/F Design

elect.

CREStress ModulesHousing

CREStress Modules/Housing

mechan.

therm.

CRE



Interfaces Bolometer Unit

BOL A

LHe Tank (1,7K)

Bolometers

FPUOPTICS

GHe Level 1 (4.2K)

FPU Structure

Bolometer Unit

CEA

MPE

CSL

KT

optical

nechanical

thermal

electrical

BOL C

MEC

Cooler

Dis

trib

uti

on

Bo

ard

Fil

ter



Bolometer Unit Interface Status


PACS Instrument Requirements Document Bolometer Specification Document will be finished after the IIDR

PACS-KT-ID-005 PACS FPU Bolometer Assembly ICD

Sap-PACS-CCa-25-00 BOLC/BOLA Subsystem Specification

Sap-PACS-CCa-24-00BOLC Electrical Interface Control Document

optical

Status I/F Design

elect.

4K HousingFilters

2K Cooler/Bolometer

mechan.

therm.

PACS IIDR 01/02 Mar 2001 Instrument Interfaces1 PACS FPU Opto-mechanical Design Overview and...

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