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Pasadena Updates

Pasadena Updates. PFS. Megacam. March 2008 - February 2009. FourStar. MMIRS. Some of the instruments arriving at Magellan in the next year. LDSS focus encoder. Chronic LDSS focus setting errors Focus signal was noisy, causing focus seek errors. Marshall, Estrada, Birk, Uomoto

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Pasadena Updates

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  1. Pasadena Updates PFS Megacam March 2008 - February 2009 FourStar MMIRS Some of the instruments arriving at Magellan in the next year

  2. LDSS focus encoder Chronic LDSS focus setting errors Focus signal was noisy, causing focus seek errors Marshall, Estrada, Birk, Uomoto Navarrette, Merino, Quiroz, Alfaro, Cortes, Jones, Bravo, Cerda Original LDSS focus encoder (voltage SLVC)

  3. LDSS focus encoder New current-loop LVDT encoder installed July 2008 New LDSS focus encoder (current LVDT)

  4. LDSS focus encoder Also installed a new A/D converter with Ethernet inside LDSS Commercial A/D converter

  5. LDSS temperature sensor LDSS focus is sensitive to temperature Using the “dome air” temperature wasn’t quite good enough LDSS focus and temperature sensors

  6. LDSS temperature sensor Added AD592 sensor to LDSS camera Jorge Bravo maintains focus offset data LDSS AD592 temperature sensor

  7. LDSS temperature sensor

  8. F/5 secondary • Mirror arrived LCO September 2009 Felipe Sánchez works on the F/5 secondary

  9. F/5 secondary • Aluminized at the Dupont chamber Povilas Palunas inspects the mirror surface

  10. F/5 secondary Installed on the Clay telescope 1 inch too close to primary On the telescope

  11. F/5 secondary New truss structure delivered to LCO Engineering with Minicam in April 2009 On the telescope

  12. F/5 baffles • February 2009 Pasadena meeting with SAO engineers • Decided to optimize baffles for Megacam as wider field instruments not scheduled • Mounting scheme discussions suggest a re-build of primary mirror shroud

  13. F/5 baffles

  14. F/5 baffles • Smaller Megacam primary baffles can be inserted from the backside of the primary • New shroud extends through hole far past the primary mirror surface to support mid-height baffles

  15. Cleanroom LCO Cleanroom excavation

  16. Cleanroom LCO Cleanroom excavation

  17. Cleanroom LCO Cleanroom excavation

  18. Shipping news • OCIW ships (exports) equipment to Chile from all over the world • Air shipments 2X / month from Pasadena • Chile has recently become a bit more formal on import papers; check with Earl Harris • Instructions at http://shipping.baade-clay.org/ • Layoffs at Schenker have made shipping more difficult; please allow extra lead time

  19. Bibliography

  20. Bibliography • 397 refereed publications as of December 31, 2008 • 74 added since December 31, 2007 • Papers missed in journals not available to OCIW or without searchable databases

  21. Crabtree counts to 2007 By permission, Dennis Crabtree

  22. Bibliography IMACS and MIKE swap places in 2008

  23. Pasadena staffing • Pasadena staffing news • Alan Bagish returned part-time Jan 2009 • Accounting analyst Gillian Tong is permanent OCIW employee • Jorge Estrada received his bachelor’s degree

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