NIFS

1
(No Transcript)
2
NIFS Conceptual Design Review
3
Presentation Schedule

• Wednesday, March 15, 2000
• 900 Committee Session
• 920 Introduction
• 940 Performance Predictions
• 1030 Coffee
• 1100 Science Drivers
• 1130 Optical Design
• 1230 Lunch
• 130 Optical Design
• 230 Mechanical Design
• 330 Coffee
• 400 NIRI Duplication
• 430 Control System
• 500 Committee Session
• 530 End of Day

• Thursday, March 16, 2000
• 900 Detector System
• 945 Software Design
• 1030 Coffee
• 1100 Management Plan
• 1130 Costing Discussion
• 1230 Lunch Workshop Tour
• 130 Procurement Discussion
• 200 NIFS Team Discussion
• 230 Coffee
• 300 Committee Convenes
• 430 Committee Comments
• 530 End of Day

4
Introduction
5
NIFS CoDR Review Team
Simon Morris (Chair) HIA/NRC John Rayner IfA,
UH Jeffrey Douglass IfA, UH Mark
Hunten IGPO Corrine Boyer IGPO Jim
Oschmann IGPO Doug Simons IGPO
6
Gemini Near-infrared Integral Field Spectrograph
Key personnel
Peter McGregor Project Scientist Jan van
Harmelen Project Manager John Hart Project
Engineer Peter Conroy Mechanical Design Gabe
Bloxham Optical Manufacture Mark
Downing Detector Systems Martin Mulligan
Control System Peter Young Software Design Kim
Sebo Software Design Mark Jarnyk Software Design
7
Fast-Tracked Schedule
Filling the Gap meeting 17 March 1999 CoDR
Work Scope signed 24 August 1999 Draft Initial
OCDD 14 October 1999 Draft Initial FPRD 14
October 1999 Design Study Outline 01 December
1999 Revised Initial OCDD 14 February
2000 Revised Initial FPRD 14 February
2000 Design Study Documentation 01 March
2000 Conceptual Design Review 15 March
2000 Order Detector 02 May 2000 Critical Design
Review 08 December 2000 Ship to Hawaii 20 June
2002 Project Close-out 20 September 2002
8
Expected Strehl Width
9
Near Diffraction-Limit Imaging Spectroscopy
10
NGC 7469 CFHT AOB, K band
10 ?
0.13? FWHM
0.7? FWHM
NIFS
11
Reflective Staircase IFU
12
Rockwell 2048?2048 HAWAII-2
13
Duplicate NIRI Cryostat
14
Duplicate NIRI OIWFS
15
Duplicate NIRI Control System
16
Goals

• Near-infrared, integral-field spectrograph.
• 3.0??3.0? field-of-view.
• R 5300 in J, H, and K photometric bands.
• HAWAII-2 2048?2048 HgCdTe detector.
• Use with ALTAIR AO system.
• Largely fixed-format design.
• Fast-track design and construction.

• Re-use NIRI design
• Cryostat.
• OIWFS.
• Mechanism control system.
• Thermal control system.
• EPICS software.

• CoDR to review new aspects of the instrument.

17
Baseline Specification

• Wavelength range 0.94-2.5 ?m.

• Spatial pixel size 0.04??0.10?.

• Spectral resolving power 5300 (two pixels)..

• Focal plane occulting masks 0.1?, 0.2?, 0.5?
  circular.

• Order blocking filters J1, J2, H, K, (J, HK).

• Gratings J1, J2, H, K, (J, HK).

• Detector Rockwell 2048?2048 HAWAII-2
  HgCdTe/PACE.

• Near-infrared OIWFS
• Wavelength range 0.95-2.5 ?m.
• Steerable over 180 ? FOV (120? with ALTAIR).
• Image scale 0.170?/pixel.
• Filters J, H, K.
• Instantaneous FOV lt 10?.

18
NIFS Science is ALTAIR Science
19

LGS

• Conjugation 6.5 km
• Latitude 30
• Zenith Angle 0
• Wind median X-wind

20

LGS

• Conjugation 6.5 km
• Latitude 30
• Zenith Angle 0
• Wind median X-wind

21
RSAA CoDR Issues

• Detector performance vs science capability?

• Confidence in performance predictions?

• Breadth of science capability?

• Availability of AO guide stars?

• Which grating selection is preferred?

• Can the IFU be made to work?

• Can scattered light be controlled?

• Can all mirrors be diamond turned?

• Which optical design is preferred?

• Can we dispense with focus mechanisms?

• Is NIRI performing well enough to duplicate the
  design?

• Can we afford UH NIRI duplication effort?

• Can we dispense with PDR?

• What purchases can be fast-tracked?

22
Risk Summary