FPI related schedule & Model Philosophy

1. FPI related schedule &Model Philosophy Based on spica_AIVT_revC, FPI_review_by_SDR_E Mar. 15th, 2010 by H. Matsuhara, N. Takahashi, T. Nakagawa

2. FPI-Related Schedule in Short Term : Review process in Japan as well as International Level FPI REVIEW BY SDR

3. SPICA Focal Plane 2300 mm MIRACLE-Short FPC-S FPC-G SCI MIRACLE-long

4. Review process of Japanese-lead instruments • Japanese-lead instruments: • MIRACLE, MIRMES, MIRHES, SCI • Instrument Proposals (including conceptual design report ) shall be submitted by the end of April, 2010. • Review by a Japanese Board (Selection committee) • prioritize each proposal by July 2010. • prioritize the instrument specifications (not instrument as a whole) in each FPI, judging by their scientific values and the technical readiness, etc. • The Details of Review & Decision process will be discussed in the Task Force Meeting on 29th March, 2010

5. Issues to be addressed in the review • Consistency with the scientific targets described in the Mission Requirement Document • Technical Feasibility • Maturity of results from the concept study • Consistency with the ICS-FPI (ICS-SAFARI, etc.) • Identification of technical development risks, clear description of prescription against risks • Propriety in the development plan, cost, & team organization

6. International Review of FPI • Review in Japan • 30th Apr. 2010 : due of Japanese-led instrument • May-July: Review by a Japanese board • ESA-JAXA Review • Q2-Q3 FY2010: review for the focal plane instrument under an international Board / committee • details need to be discussed / agreed • “SAFARI Phase-A final study report” need to be reviewed also by ESA & JAXA, well before SDR • Other Instruments • US-lead instrument: review & selection process under discussion with NASA • Korean-based instrument (FPC) also need to be reviewed (schedule under discussion)

7. “FPI Review process”Issues to be agreed • Definition of ‘international (review) board/committee’ for the final FPI decision • Authority, place in the project structure • Policy of membership • Review Policy – need to be agreed • Judgment should be based on the achievement in the “Issues to be addressed” (see page 4) • For Japanese-lead instrument, JAXA proposes to make selection based on the function/coverage of the instrument within SPICA and not on the individual instrument.

8. Necessary Models for the System Level Tests of the FPI Assembly FPIA MODEL PHILOSOPHY & TEST SCHEDULE

9. Key issues for FPI AIV&T • FPI’s system-level test plan should take account of the critical issues as below: • (a) FPI is cooled to <5K with J-T coolers under extremely careful Spacecraft thermal design. • (b) disturbance and interference from J-T coolers and AOCS (such as RW, gyro) • To assure high-sensitivity (low-noise) in orbit • (c) Co-operation with FPC-G to establish the pointing stability • Interferences? Alignment? • (d) Co-focus among FPIs (especially MIR’s) • Since STA 2ry cannot be adjusted so frequently in orbit

10. FPI Model philosophy • Cold FPIs • Minimum number of Models required for the system level test (in the previous page) is: • FM (Flight Model) (& its spare) • STM : structure thermal model • CQM : cold qualification model • Warm Electronics • Similar as above, except for the terminology (CQM  PM (proto-model) • A concern about SAFARI Warm Electronics STM : can the requested heat dissipation be simulated by a heater? • Spacecraft DHS simulator(SpaceWire I/F) will be developed, and distributed hopefully before 2014 ( under discussion)

11. STM (Structure Thermal Model) for FPIs • Purposes • Evaluate their mechanical (at ambient temp.) & thermal compliances at cold, in the system level (PLM or Spacecraft) • Evaluate transfer function of mechanical disturbances originated from FPIs • Required Function • Same mechanical I/F specifications to FM • Same thermal I/F specifications to FM • Equipped with thermometers, acceleration sensors for measurement of I/F environmental condition • Simulate mechanical disturbance according to the system operation modes • Proposed Delivery • Oct. 2012 : before starting of assembly of PLM(STM) for the system Mechanical & Thermal Test

12. CQM (Cold Qualification Model) for FPIs • Purposes • Evaluate thermal compliance at cold with J-T(PM) cooler • Evaluate susceptibility to mechanical disturbances from J-T (disturbance simulator) and AOCS simulator • Evaluate electrical interferences among FPIs, J-T, AOCS • Required Function • Same thermal, mechanical, electrical I/F specifications to FM • Equipped with detectors operable at low-temperature, with the same noise performance as that of FM • Simulate heat-dissipation (load to J-Ts), mechanical disturbance according to the system operation modes • Equipped with a optical image, to check the co-focus among FPIs • Proposed Delivery • Apr. 2015 : when the PLM(FM) is available for us to test the items in page 2. • Earlier delivery enables us to feedback for the design of FM

13. FM (Flight Model) for FPIs • Purposes • For on-orbit observations; for our scientific objectives, of course! • After delivery and assembly to FPIA, FM will go to the “evaluation at cold” in the dedicated chamber for evaluation of interferences, co focus among FPIs • Required Function • Science Grade optical, noise, and sensitivity performances! • Note that after the test called “FPI evaluation at cold”, long-wavelength channel detectors cannot be operated (even may not be switched on??) - so how to verify its health during the long waiting time before launch/cooling in orbit? • Delivery date of FM: June 2016 (August 2016 at worst) in the proposed scenario.

14. SPICA AIV&T timeline (tentative) Consistency need to be checked with Industries’ estimates !!

15. FPI: ＳＰＩＣＡ system test plan • With STM: • Mechanical Environmental test & thermal test at cold at the PLM level • Mechanical Environmental test & Thermal balance test at Spacecraft level • Measure disturbance at FPI from J-T cooler/AOCS • With CQM: • Cooling compliance test with J-T (PM) most important • Evaluate susceptibility to mechanical disturbances from J-T (disturbance simulator) and AOCS simulator, • Co-focus is also checked to some level at cold (tbd) • Evaluate electrical interferences among FPIs, J-T, AOCS in the 1st whole FM V&T in 2016 if FM is not available yet • With FM • FPI evaluation at cold (optical & electrical) • STA optical performance test at cold • Thermal test at cold at PLM level

16. PLM Thermal Test at cold(STM and FM) • Purpose • Evaluation of PLM cooling system performances • Alignment measurement between STA and FPIA with FPC? • Date & Duration • STM: April 2013 • FM: Dec. 2017, ~2months • Method • Additional shields in the existing 13m space chamber in Tsukuba • Shields are externally lifted by mechanical coolers

17. FPI(CQM or FM) test config. in the 1st Whole FM V&T • 1Q-2Q FY2016, checkout with FM Bus Module Electronics before assembly/integration of FM Bus System IOB FPI FPI LHe Mech. Cooler (commercial)

18. Summary • Short-term schedule, esp. review process by SDR • ESA – JAXA review in Q2-Q3 FY2010 should be discussed / agreed • “SAFARI Phase-A final study report” need to be reviewed also by ESA & JAXA, well before SDR • “The Review policy” need to be agreed • FPI Model Philosophy • Two models (STM, CQM) besides FM are proposed • Proposed Delivery : • Oct. 2012 for STM • Apr. 2015 for CQM • June 2016 for FM – does this meet the SAFARI schedule? • Earlier Delivery of CQM benefits to the mature design of FM