07-1 MIRI Optical System CDR, 6th & 7th December 2006

Mid InfraRedInstrument

Optical SystemCritical Design Review (CDR)

TIPS Presentation:Margaret Meixner

07-2 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

MIRI CDR Process

Hybrid ESA/NASA CDR:- Oral presentations for panel Dec 6&7 (NASA style)- Main focus is on month long review of MIRI data packet by expert panels

who write and collect RIDs - Anyone can submit a RID for MIRI (yes that means you) by giving it to one of

the panel or board members; Peter Stockman is on the board.

RIDs collected and sorted in January. Disposition of RIDS presented to the board in February This presentation provides a status of MIRI at the time of CDR.

07-3 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-4 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-5 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-6 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-7 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

Imager - Optical Requirements (Wright)

Requirements: > 2 square arcmin field of

view, with a 0.11 arcsecond pixel scale

Image Quality- > 58% of light within first

dark ring of model telescope PSF

- Strehl ratio > 85 % longward of 5.6 m

Coronagraphy in 4 filter bands (see Design Doc. for details)

R=100 Spectroscopy

Simulated NIR JWST field (Myungshin Im 1998)

1.3 arcmin

1.7 arcminDesign:

07-8 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-9 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-10 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-11 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-12 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-13 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

Medium Resolution Spectrometer - Format (Wright)

10 arcseconds

Channel 1(4.9 - 7.7 m)

Channel 2(7.4 - 11.8 m)

Channel 3(11.4 - 18.2 m)

Channel 4(17.5 - 28.8 m) Wavelength/Velocity

Each channel’s field of view is sliced, dispersed and detected.

REQUIREMENT - Integral Field Spectroscopy with > 3 arcsec field of view from 5 to 28.5 µm.

07-14 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

The MRS concept (Wells)

-4

-3

-2

-1

0

1

2

3

4

-4 -2 0 2 4Field of view across slices (arcsec)

IFU 1AIFU 1BIFU 2AIFU 2B

IFU 1B

IFU 1A

IFU 2A

IFU 2B

Collimator

Collimator

Collimator

Collimator

Camera 1

Camera 2

FPA 1

FPA 2

Grating

Grating

Grating

Grating

LW dichroic

centredichroic

SW dichroic

07-15 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

500

1000

1500

2000

2500

3000

3500

4000

4 6 8 10 12 14 16 18 20 22 24 26 28 30

RequirementChannel 1AChannel 1BChannel 1CChannel 2AChannel 2BChannel 2CChannel 3AChannel 3BChannel 3CChannel 4AChannel 4BChannel 4C

MIRI MRS - Spectral Coverage (Glasse)

Wavelength [m]

Spec

tral

Res

olvi

ng P

ower

The MRS covers the 5 to 28 micron range in 12 sub-spectra

FRD 2.5.1.2How the spectra will

appear on the MRS’s two detectors

07-16 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

MIRI MRS

FOV Name

-range microns)

FOV () sub-band name range

microns)

IFU1A

4.867.74

3.7 3.7 Short

Medium

Long

4.875.82

5.626.73

6.497.76IFU1B

7.4311.84

4.5 4.7 Short

Medium

Long

7.458.90

8.6110.28

9.9411.87

IFU2A

11.4418.20

6.1 6.2 Short

Medium

Long

11.4713.67

13.2515.80

15.3018.24

IFU2B

17.5328.75

7.7 7.7 Short

Medium

Long

17.5421.10

20.4424.72

23.8428.82

Target Acquisition required for some cases

Selection of:•Grating wheel position: 1 of 3 sub-bands•Detector readout •Exposure time•Dithering/Mapping

07-17 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-18 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-19 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-20 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-21 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-22 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-23 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-24 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-25 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

MIRI Optical System Modes

Consistent with JWSTState

Consistent with JWST/ISIM State

Consistent with JWST/ISIM State

Consistent with JWSTState

MIRI FSW/ICDH RegisterISIM powers on ICE, FPE, CCEFPGAs set-up I/Os @ Boxes a) 1553 BC/RT b) Spacewire I/F init w ICDH I/O driverSet default Power-On State (POR) - Initialize MIRI - Proceed to Eng. Mode

OFF

Safe

Operating orObservation

Standby/Engineering

Test Annealing ContaminationControl

PhotometricImaging Coronagraphy Medium Resolution

SpectroscopyLow Resolution

SpectroscopyDark CurrentCalibration

OFF

MIRI Mode

Sub-mode/State

Configuration

Health-CheckMemory Dump, etc.

Specific State of Contingency Stop exposure, Reset FPE, FPE remains (minimum functionality (PDU on, SpaceWire board on, no SCEs) All Mechanisms are stopped, POM heater Off, Calibration Sources Off, Position Sensors, Cover status Unchanged

Special cases: [FPE in low power & CCE on]

........

TransitionalState

Survival

Initialize

MIRI may be turned off from any of itsoperational modes

Nominal Power Off

07-26 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-27 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-28 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-29 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page

07-30 MIRI Optical System CDR, 6th & 7th December 2006This document contains proprietary information as stated on the cover page