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SPIRE Consortium Meeting La Palma, Oct. 1 – 2 2008

SPIRE Consortium Meeting La Palma, Oct. 1 – 2 2008 System-level testing: results, plans up to launch Bruce Swinyard RAL. What we were supposed to do. What we’ve done. . . . . . . . . . . In riveting detail. February – Warm functional test

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SPIRE Consortium Meeting La Palma, Oct. 1 – 2 2008

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  1. SPIRE Consortium MeetingLa Palma, Oct. 1 – 2 2008 System-level testing: results, plans up to launch Bruce Swinyard RAL System Level Testing Bruce Swinyard 1

  2. What we were supposed to do System Level Testing Bruce Swinyard 2

  3. What we’ve done           System Level Testing Bruce Swinyard 3

  4. In riveting detail • February – Warm functional test • March – Cold Functional Test • May – SMEC tests (pre vibe) • June – JFET switch on check (post Vibe) • July – more SMEC tests (post Vibe) – uVibration test • July – S/C EMC RE test • August – SPT – feat. EMC RS and uVibe test on detectors • September – RMS/SOVT1 System Level Testing Bruce Swinyard 4

  5. Functional tests all o.k. Everything survived vibe SMEC has some issues Results System Level Testing Bruce Swinyard 5

  6. Sticky SMEC in May Drive current Encoder signal LVDT signal System Level Testing Bruce Swinyard 6

  7. In case you missed the point….. LVDT signal Drive current Encoder signal System Level Testing Bruce Swinyard 7

  8. In July we unlatched again Encoder signal1 Encoder signal2 LVDT signal System Level Testing Bruce Swinyard 8

  9. Now it scans….. System Level Testing Bruce Swinyard 9

  10. Microphonics – reaction wheels System Level Testing Bruce Swinyard 10

  11. Velocity stability vs PFM4 PFM4 IST? IST –wheel System Level Testing Bruce Swinyard 11

  12. Velocity stability during wheel ramp System Level Testing Bruce Swinyard 12

  13. The cooler recycled (eventually!) Base temp~297 mK – hold time ~21 hours Wrong temperatures in cryostatWrong angle System Level Testing Bruce Swinyard 13

  14. Photometer – Temperatures ~310 mK PLW System Level Testing Bruce Swinyard 14

  15. Photometer – Temperatures ~320-325 mK PMW System Level Testing Bruce Swinyard 15

  16. Photometer – Temperatures ~315-320 mK PSW System Level Testing Bruce Swinyard 16

  17. Photometer – pixel operability PLW A6 – offset problem? System Level Testing Bruce Swinyard 17

  18. Photometer – pixel operability PMW A13 – v slow T2 - dead System Level Testing Bruce Swinyard 18

  19. Photometer – pixel operability PSW 1/2 A13 – v slow C12 - dead A11 – v slow D15 – wrong way round System Level Testing Bruce Swinyard 19

  20. Photometer – pixel operability PSW 2/2 G8 - dead System Level Testing Bruce Swinyard 20

  21. Power distribution System Level Testing Bruce Swinyard 21

  22. Temperature – compare PCAL to PFM4 System Level Testing Bruce Swinyard 22

  23. Cryocover mirror (SPIRE side): Toric (=biconic in the model) with RoCs and position & orientation along chief ray set as per HP-2-ASED-TN-0076 Issue 2 (17/10/03) section 2.3 PCAL – optical model PCAL: 1mmx1mm emitter feeding CM4 hole (~3mm diameter) via ~20mm long light pipe, based on SPIRE DDD & PCal ICD & Applied Optics 44-16 (2005); initially on-axis then sequentially tilted to represent prime and redundant Telescope focal surface: Virtual surface shared by all instruments SPIRE Photometer: ASAP optical model from design prescription BOLPHOT155 OPTICAL MODEL System Level Testing Bruce Swinyard 23

  24. Comparison Prime/Redundant (without cryo-cover) Gradient along Z ~x2 but max gradient (~x3) in a diagonal + different orientation prime / redundant Prime or redundant PSW sampling PLW sampling 3D view The other one System Level Testing Bruce Swinyard 24

  25. Comparison Prime/Redundant (with cryo-cover) Dominated by return path from cryo-cover + only slight differences between prime & redundantc Prime or redundant PSW sampling PLW sampling Detailed The other one System Level Testing Bruce Swinyard 25

  26. Photometer Noise System Level Testing Bruce Swinyard 26

  27. Spectometer Operability System Level Testing Bruce Swinyard 27

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