TableOfContents(2)

PACS bolometer operation from the commanding point of view

T. Mueller, D. Cesarsky; 19-May-2006

1. Instrument switch-on and connection of the warm electronic boxes

- currently done with tcl-script PACS_Switch_On.tcl (maintained by FGB)BR - after execution: PACS is in SAFE mode

2. Cooler recycling (only at HeII temperatures)

- starting out of SAFE modeBR - CUS script: BOLO_cool_recycle (no sub-procedures are called)BR - ending up in SAFE modeBR

3. General Setup for Photometer Operation (at warm, HeI, HeII temperatures and after cooler recycling)

- starting out of SAFE modeBR - CUS script:BR

• block PHOT_setup calling the following CUS procedures (will be renamed to PHOT_orbit_prologue):

  • - procedure PHOT_dpu_dmc_setupBR - procedure PHOT_dmc_setupBR

    • - procedure PHOT_fltw_conf (*)BR - procedure CONF_chopper (*)BR - procedure CONF_cs (*)BR

    - procedure PHOT_set_bias (*)BR - procedure PHOT_seq_setupBR - procedure PHOT_change_data_modeBR - procedure PHOT_change_seq_modeBR - procedure PHOT_set_gainBR - procedure PHOT_spu_setupBR

• (*) certain parameter values depend on the temperature environment!BR

• - ending up in PHOTOMETRY mode, but SPU processing has not yet startedBR - Note: filter is in position "A", chopper at position "0"BR - calibration sources are set to default values, but need 30-40 min stabilisation time!!!BR

4. Operation of the bolometers (starting out of PHOTOMETRY mode)

4.1. start/stop of bolometer data flow

• CUS scripts:BR

  • - procedure PHOT_spu_setup ---> bolometer data flow running BR - procedure PHOT_spu_reset BR

4.2. Change of the bolometer data/sequence mode and gain

• CUS scripts:BR

  • - procedure PHOT_change_data_modeBR - procedure PHOT_change_seq_modeBR - procedure PHOT_set_gainBR

4.3. Take data with manual chopper & filter movements

• CUS scripts:BR

  • - procedure PHOT_spu_setup ---> bolometer data flow runningBR

    • - procedure PHOT_fltw_moveBR - command Pacs_DMC_MOVE_CHOP_ABSBR - command Pacs_DMC_MOVE_CHOP_RELBR

    - procedure PHOT_spu_resetBR

4.4. Take data with pre-defined OBCPs

• CUS scripts:BR

  • - procedure PHOT_spu_setup ---> bolometer data flow runningBR

    • - block OBCP_chopped_photometryBR - block OBCP_chopped_photometry_ditherBR - block OBCP_phot_freezeframeBR - block OBCP_phot_cal_IBR - block OBCP_phot_cal_IIBR - block OBCP_phot_cal_IIIBR - block OBCP_phot_staringBR - block OBCP_phot_chopper_scanBR

    • - block PHOT_all_aots_OBSBR

    - procedure PHOT_spu_resetBR

4.5. Execute AOT observations

• CUS scripts (to be finalised):BR

  • PHOT_AOTBR

    • - PacsPhotDefaultsBR - PacsPhotEstimatorOBCPnBR

      • - PacsDureeOBCP5BR

        • - DMC_phot_2_3_chopBR

        - PacsDureeOBCP7BR

        • - DMC_staring_photBR

      Logic chooses and issues a pointing mode out of:BR

      • - composite_noddingBR - repeated_raster_with_holdBR - line_scan_with_holdBR

      - WriteOBSIDBR - PacsPhotSlewCalBR

      • - PHOT_aot_prologueBR

        • - PHOT_spu_setupBR

        - PHOT_fltw_moveBR - OBCP_chopped_photometryBR

      - PacsPhotCommandOBCP7BR

      • - OBCP_staring_photometryBR

      - PacsPhotCommandOBCP5BR

      • - OBCP_chopped_photometry_ditherBR

      - PHOT_aot_epilogueBR - WriteEndIDBR - PacsPhotNoiseRMSBR - PacsMessageCenterBR

5. Reset after photometer operation

• - PACS is in PHOTOMETRY or any other modeBR - going into SAFE mode:BR

  • CUS scripts:BR

    • - block OBCP_SAFEBR

  - after execution: PACS is in SAFE modeBR

6. Instrument switch-off

• - currently done with the tcl-script PACS_Switch_Off.tcl (maintained by FGB)BR - after execution: PACS is switched offBR

7. NOTES

• - there are more CUS scripts related to the SFT warm, HeI and HeII which are not mentioned here (see PACS-ME-TP-007)BR - some specific photometer tests, like the thermal behaviour

  • measurements, start directly out of SAFE mode, while most

    of the tests will be executed after the PHOT_setup

  - the above mentioned CUS scripts (with a few exceptions) have been
  • tested and are available in the CUS database and from the

    CVS libraryBR

  - the AOT related CUS-scripts are still under testing