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NICMOS Status Update

NICMOS Status Update. NCS/NCC restart: Goals: Avoid a condition where mostiure can migrate into the Circulator Pump and freeze out (causing current limit violations) Avoid a condition where the TurboAlternator operates near its lowrr thrust bearing speed limit for an extended period of time

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NICMOS Status Update

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  1. NICMOS Status Update Anton Koekemoer NICMOS Status Update • NCS/NCC restart: • Goals: • Avoid a condition where mostiure can migrate into the Circulator Pump and freeze out (causing current limit violations) • Avoid a condition where the TurboAlternator operates near its lowrr thrust bearing speed limit for an extended period of time • Reproduce as closely as possible the conditions of the successful March 2002 cooldown • Restart criteria: Temperatures within 275 - 278 K for > 12 hours for: • TurboAlternator inlet • Circulator housing • heat rejection interface274 • Temperatures of TA inlet were 274.6 K as of this morning • Aiming for a restart sometime early Friday morning • NICMOS SMOV plan remains ready to execute • NICMOS reprocessing: • All pre-NCS data reprocessed, in HLA • Next step is to continue post-NCS reprocessing

  2. NICMOS Status Update Anton Koekemoer Recent NCS restart attempts • With circulator problems: • 2008 Sep 11: Safed on Circulator speed limit 1396 rps after approximately 6 hours of operation. Circulator Housing Temp ~ 94 K. (NCC Only) • 2008 Sep 15: Circulator Housing Temp ~ 169 K. Safed at start-up on Circulator current limit of 130 mA. (NCC only) • 2008 Sep 16 (1): Circulator Current Limit raised to 150 mA. Safed at start-up on Circulator speed limit of 1396 rps. (NCC only) • 2008 Sep 16 (2): Circulator Upper Speed Limit was disabled. Circulator Housing Temp ~ 187.5 K. Safed shortly after start-up (~25 minutes) on Circulator current limit of 150 mA. (NCC only) • 2008 Nov 19: Circulator Housing temp ~ 274 K. Safed at start-up on Circulator current limit of 150 mA. (NCC Only): • Successful circulator restart, but TA low speed problems: • 2008 Dec 20: Circulator Housing temp ~280 K. TA Inlet temp ~ 209K. Safed on TA Speed low limit of 1650 rps after 65 hours of compressor operations. (NCC Only) • 2009 Jan 15: Circulator Current Limit raised to 200mA. Circulator Housing Temp ~280K. Safed on TA speed low limit of 1650 rps

  3. NICMOS Status Update Anton Koekemoer Other NICMOS News • NICMOS Data Handbook V8.0 released (Thatte, Dahlen et al.) • NICMOS Instrument Handvook v11.0 released (Viana, Wiklind et al.) • Instrument Science Reports: • NICMOS ISR 2009-001 (E. A. Barker & T. Dahlen): "New Bad Pixel Mask Reference Files for the Post-NCS Era" • NICMOS ISR 2009-002 (T. Dahlen et al.): "Temperature Dependent Dark Reference Files: Linear Dark and Amplifier Glow Components" • NICMOS ISR 2009-003 (T. Dahlen, M. Sosey & E. Bergeron): "Updates to Calnica: Using Temperature Dependent Reference Files" • NICMOS ISR 2009-004 (A. C. Viana, R. S. de Jong & A. M. Koekemoer): "NICMOS Photometric Calibration Pipeline" • NICMOS ISR 2009-005 (D. Thatte & T. Dahlen): "NICMOS Temperature Dependent Flat-fields" • NICMOS ISR 2009-006 (N. Pirzkal, R. Bohlin & D. Thatte): "NICMOS Grism Wavelength Calibration" • NICMOS ISR 2009-007 (N. Pirzkal, D. Grumm & E. Bergeron): "CalTempFromBias:Implementation and Testing: • NICMOS ISR 2009-008 (T. Wiklind & D. Thatte): "NICMOS Breathing and Focus Field Variations"

  4. NICMOS Status Update Anton Koekemoer Some NICMOS Reprocessed / HLA images

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