1 SOFIA Science Instrument Trimesterly Review T1 ‘09 (Incremental Review) Harvey Moseley, Dominic Benford, Johannes Staguhn, George Voellmer NASA / GSFC Principal Investigator: Dr. S. Harvey Moseley Partners:Cornell, NIST, UBC Instrument Type: Far-IR Direct Spectrometer

2 Instrument Highlights: T q Full team in place: q Systems Engineer (Voellmer) q Setup Detector Characterization (Jethava (postdoc); Chuss, part time) q Optical Design (Pasquale, part time) q Mechanical Design (Steigner, full time; Jackson, part time) q Completed first detailed optical design q Completed first flight detector package design q Detector characterization cryostat components tested or in fab q SAFIRE Science Team Meeting held 4/15/09

3 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

4 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

5 SAFIRE Status Summary Category TechnicalCostSchedule Comment 1. Cryostat Building up array characterization system; flight cryostat draft design in good shape. 2. Detectors: BUGs Detector packaging underway 3. Optics Completed trade study & design 4. Electronics UBC readout for larger formats underway 5. Software IRC support for superconducting detectors in good shape! 6. Airworthiness Waiting until certification process solidifies. 7. ICPn/a Will be determined later.

6 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

7 Quick Look at Details – need to update Progress on prototype “GISMO” 4 Camera with 8x16 BUG arrays fielded – successful October observing run! 4 Processing software improving! Mechanical: 4 Begun concept work on mechanisms. Detectors: 4 Making progress on 32x40 arrays Optics: 4 First detailed optical design completed. Electronics: 4 Upgrading UBC MultiChannel Electronics for 32x40 arrays with improved bias selectability Software / DCS / Pipeline: 4 Going well. Incorporating simulated MCE data Airworthiness: 4 Possible change in certification process will help SAFIRE. Budget: 4 Has been healthy; FY09 funds partially received.

8 Recent Accomplishments Test Dewar Received 2 PTC’s from Cryomech. Completed performance testing and rotation testing. Completed acceptance testing of 2 Test Dewar ADR’s from HPD. Delivery XX/09 Test cryostat design complete, 2 units in fab at Precision Cryogenics Expect first Test Dewar cold test XX/09

9 Recent Accomplishments Flight Instrument Instrument science trades complete- go with a 2 grating design Preliminary designs complete: –Optics –Cryostat / Thermal Preliminary designs started: –Structure –Detector –Detector Packaging –Grating Mechanism –Fixed Optical elements –Exchangeable optical elements

10 Current Status: Optics

11 SAFIRE Optical Layout (I) April 15, 2009SAFIRE Science Team Meeting Systems - 11

12 SAFIRE Optical Layout (II) April 15, 2009SAFIRE Science Team Meeting Systems - 12

13 SAFIRE IFOV / EE Ensquared Energy: 88% - 91% April 15, 2009Optics - 13SAFIRE Science Team Meeting

14 SAFIRE Diffraction Spots Strehl range calculated across full field Lowest Waveband is not Diffraction Limited Central Wavelength Strehl Min Strehl Max Spot Size (mm) April 15, 2009Optics - 14SAFIRE Science Team Meeting

15 SOFIA Instrument Complement

16 SAFIRE Wavelength & Resolution April 15, 2009SAFIRE Science Team Meeting Astrophysics - 16 “Required” Δv and λ

17 Far-IR Spectrometer Sensitivity April 15, 2009Astrophysics - 17 SAFIRE Science Team Meeting

18 Current Status: Cryostat

19 SAFIRE Instrument Model (VI) April 15, 2009SAFIRE Science Team Meeting Systems - 19

20 Current Status: Thermal

21 Current Status: Structure

22 SAFIRE Instrument Model (I) April 15, 2009SAFIRE Science Team Meeting Systems - 22

23 SAFIRE Instrument Model (II) April 15, 2009SAFIRE Science Team Meeting Systems - 23

24 SAFIRE Instrument Model (III) April 15, 2009SAFIRE Science Team Meeting Systems - 24

25 SAFIRE Instrument Model (IV) April 15, 2009SAFIRE Science Team Meeting Systems - 25

26 SAFIRE Instrument Model (V) April 15, 2009SAFIRE Science Team Meeting Systems - 26

27 Current Status: Detector

28 Large Format Array Technologies for SAFIRE: Bump Bonds, cross-wafer vias, BUG bolometers Detector: Superconducting Bolometer Array April 15, 2009SAFIRE Science Team Meeting Systems - 28

29 Current Status: Detector Packaging

30 8x16 BUG detector in GISMO April 15, 2009SAFIRE Science Team Meeting Systems - 30

31 Current Status: Grating Mechanism

32 Current Status: Optical Elements

33 Current Status:

34 UBC Multi Channel Electronics SAFIRE to use MCE readout electronics demonstrated by SCUBA-2 et al. April 15, 2009Systems - 34SAFIRE Science Team Meeting

35 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

36 Budget Status - FY08 Closeout Budget Status, FY08: –SAFIRE baseline $1044K; first year of major funding! –Funding Received, fully committed* –Costing slower than expected due to a single contract; expecting to solve soon. *as per GSFC definition

37 FY09 Budget Status $411K received to date (4/23/2009) $390K committed to date $ 40K of bills will arrive by next week… $300K (next portion of FY09 funds) supposed to arrive soon!

38 Budget (II) Identify alternate funding sources if any: SPIRE funded detector development for; FY SR&T grant for bolometer development; FY ROSS grant for array and Fabry-Perot development; FY DDF grant for TES bilayer research; FY01/02 1 DDF grant for monochromatic photometry calibrator; FY01/02 Software funded through SOMO program up to FY03 1 ROSS grant for improved quantum efficiency; FY02/03 1 DDF grant for mechanism sensors; FY02 1 R&TD for SAFIRE support; FY02 1 DDF grant for bolometers w/polarizers; FY03 Internal R&D funding for detector test system; FY03 IR&D funding for SAFIRE support; FY04 R&TD funding for optical mechanisms granted; FY05 IR&D funding to enable multiplexing granted; FY05 NSF ACT project funding 1x32 detectors; FY ROSS/APRA proposal for further detector developments granted; FY05-07 NSF Proposal awarded to support GISMO observing! ROSES/APRA grant to support large array fabrication! ROSES/APRA grant to support ultralow-NEP detectors Balloon-borne experiment to use detectors as in SAFIRE ROSES/APRA for new instrument technology development Past Ongoing New Submitted

39 Budget (III) Work plan for FY07-13 with commissioning flight in ~late CY12 still on track. Plan: building SAFIRE in FY08/09/10, complete in FY11, and fly in ~December Flight work (optical design, cryogenic system, mechanisms, detectors/electr.) making excellent progress Reduction in FY09 budget required layoff of staff and putting some work (Detector array fabrication) on low level We remain committed to delivering SAFIRE as planned, and will work with SOFIA to enable this in the present adverse environment.

40 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

41 Until Aug 2009 SITRCompletedCritical Path LinkageComment/Mitigation Commission FPA Char. Syst.Yes Optical Mechanism DesignNo Optical AnalysesNo Cryostat DesignNo Prototype 2 nd Gen MuxYesAt NIST MultiChannel Electronics in fab YesAt UBC SAFIRE Sliding Trimesterly+ Schedule Since Dec 2008 SITRCompletedCritical Path LinkageComment/Mitigation Refine optical designYesComplete Detector wrap-around-via demoYesDone; working reliability Prototype 32x40 packageNoDesign baselined Detector bump bondingYesSlowdown Begin 2 nd Gen MuxNoOngoing at NIST Test FPA characterization system NoMajor components completed & tested. Begin UBC electronics buildup NoRedesign commenced.

42 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

43 FY09 Plan Considerations: –Staff in place to make rapid progress –Detector development co-funded by ROSES/APRA Plan of Work: 1.Characterize prototype low-NEP detectors  slowed 2.Conduct optical layout trades 3.Mech/System Design  PDR (scheduled for June 17) 4.Complete testing of GISMO 5.Start production of flight detector parts 6.Protoflight electronics from UBC

44 SAFIRE Review Outline Items: 1. Fever Chart on Subsystems 2. Technical Progress 3. Budget Status 4. Schedule ±4 Months, Overall 5. FY09 Scope of Work 6. Risk Assessment

45 QA Issues and Mitigations Need to keep an eye on QA during detailed design phase

46 Overview Risk Assessment Technological: in good shape! –Risk: will flow from design work FY09 –Mitigation: keep focused & continue testing everything! Airworthiness: –Team for design work has begun, will do PDR first –(note: as per advice from Scott Horner, deferring airworthiness) Programmatic: –Had to accommodate reduction in funds in FY09 –Slowed detector fabrication; let characterization come up Major char. Sys. Components complete & tested Postdoc (Nikhil Jethava) arrived April 1