Index TableOfContents(2)

PACS bolometer operation from the commanding point of view

T. Mueller, D. Cesarsky; 08-Nov-2006

1. Short functional tests

1.1. SFT Warm: Sorption Cooler and Bolometer detector chain

• PACS_Phot_SFT_Cooler_Warm_OBS, calling PACS_Phot_SFT_Cooler_Warm

• PACS_Phot_DPU_DMC_Setup_OBS, calling PACS_Phot_DPU_DMC_Setup

• PACS_Phot_Switchon_OBS, calling PACS_Phot_Switchon

• PACS_Phot_Sequencer_Setup_OBS, calling PACS_Phot_Sequencer_Setup

• PACS_Phot_SPU_Setup_OBS, calling PACS_Phot_SPU_Setup

• PACS_Phot_Warm_Startinputsignal_OBS, calling PACS_Phot_Warm_Startinputsignal (Duration: 637 sec)

• PACS_Phot_SPU_Reset_OBS, calling PACS_Phot_SPU_Reset

• PACS_Phot_Switchoff_OBS, calling PACS_Phot_Switchoff

Note: No specific autonomy functions are involved here (except AF#6 to check for the communication between DMC and BOLC)

1.2. SFT at HeI: Sorption Cooler and Bolometer detector chain

• PACS_Phot_SFT_Cooler_OBS, calling PACS_Phot_SFT_Cooler

• PACS_Phot_DPU_DMC_Setup_OBS, calling PACS_Phot_DPU_DMC_Setup

• PACS_Phot_Switchon_OBS, calling PACS_Phot_Switchon

• PACS_Phot_Sequencer_Setup_OBS, calling PACS_Phot_Sequencer_Setup

• PACS_Phot_SPU_Setup_OBS, calling PACS_Phot_SPU_Setup

• PACS_Phot_Cold_Startinputsignal_OBS, calling PACS_Phot_Cold_Startinputsignal (Duration: 637 sec)

• PACS_Phot_SPU_Reset_OBS, calling PACS_Phot_SPU_Reset

• PACS_Phot_Switchoff_OBS, calling PACS_Phot_Switchoff

Note: No specific autonomy functions are involved here (except AF#6 to check for the communication between DMC and BOLC)

1.3. SFT at HeII (cooler not recycled): Sorption Cooler and Bolometer detector chain

• PACS_Phot_SFT_Cooler_OBS, calling PACS_Phot_SFT_Cooler

• PACS_Phot_DPU_DMC_Setup_OBS, calling PACS_Phot_DPU_DMC_Setup

• PACS_Phot_Switchon_OBS, calling PACS_Phot_Switchon

• PACS_Phot_Sequencer_Setup_OBS, calling PACS_Phot_Sequencer_Setup

• PACS_Phot_SPU_Setup_OBS, calling PACS_Phot_SPU_Setup

• PACS_Phot_Cold_Startinputsignal_OBS, calling PACS_Phot_Cold_Startinputsignal (Duration: 637 sec)BR

• PACS_Phot_SPU_Reset_OBS, calling PACS_Phot_SPU_Reset

• PACS_Phot_Switchoff_OBS, calling PACS_Phot_Switchoff

Note: No specific autonomy functions are involved here (except AF#6 to check for the communication between DMC and BOLC)

2. Nominal operations

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

• currently done with tcl-script PACS_Switch_On.tcl (maintained by FGB)

• after execution: PACS is in SAFE mode, the bolometer groups are off, but the temperature sensors are on

Note: Autonomy function #6 is enabled to check for the communication between DMC and BOLC

2.2. Cooler recycling (only at HeII temperatures)

• starting out of SAFE mode (groups off, temperature sensors on)

• mode BOLO_cooler_OBS calling the CUS procedure BOLO_cool_recycle:

  • no sub-procedures are called, the groups and temperature sensors are not touched
  • HK_list is set to PHOT_HK and reset to "NON-PRIME" in the end
  • autonomy function 14 is enabled, Duration: 7928 sec
• ending up in SAFE mode (groups are off, temperature sensors on, HSP heater current at 1.18 mA)

Note: At the end of the recycling the autonomy function 14 is enabled. It checks for TEMP_EV, TEMP_FPU1, TEMP_FPU2: --> HK DEC SOFT is generated if one or more are out of the range [260,320] mK; --> GO SAFE is generated if one or more are above 400 mK

2.3. General Setup for Photometer Operation (after cooler recycling)

• starting out of SAFE mode (groups off, temperature sensors on)

• mode PHOT_setup_OBS calling the block PHOT_setup, calling the following CUS procedures:

  • procedure PHOT_dpu_dmc_setup
  • procedure PHOT_dmc_setup
    • procedure PHOT_fltw_conf
    • procedure CONF_chopper
    • procedure CONF_cs
  • procedure PHOT_switchon_groups
  • procedure PHOT_set_bias (*)
  • procedure PHOT_seq_setup
  • procedure PHOT_change_data_mode
  • procedure PHOT_change_seq_mode
  • procedure PHOT_set_gain
  • procedure PHOT_spu_setup
    • (*) the bias tables to be loaded can change!
• ending up in PHOTOMETRY mode, but SPU processing has not yet started
• filter is in position "A", chopper at position "0"
• calibration sources are set to default values, but need 40-50 min stabilisation time!!!

Note 1: At the end of the PHOT_setup_OBS the autonomy function 17 "generate_event_pwr" is enabled. It checks for the HK entries: PC_PWR_ANA_P_#, PC_PWR_ANA_N_# and PC_PWR_DIG_#, with # = [1,2,3,4,5,6,7]

Note 2: PHOT_setup_OBS can be called via the generic tcl-script (with a default bias table) or via a specific tcl-script together with a special bias table.

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

2.4.1. start/stop of bolometer data flow

• mode PHOT_spu_setup_OBS calling procedure PHOT_spu_setup ---> bolometer data flow running

• mode PHOT_spu_reset_OBS calling procedure PHOT_spu_reset ---> bolometer data flow stopped

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

• procedure PHOT_change_data_modeBR

• procedure PHOT_change_seq_modeBR

• procedure PHOT_set_gainBR

• or via MSTK with individual commands

2.4.3. Take data with manual chopper & filter movements

• mode PHOT_spu_setup_OBS calling procedure PHOT_spu_setup ---> bolometer data flow runningBR

  • - block PHOT_fltw_move_OBS calling procedure PHOT_fltw_moveBR - command Pacs_DMC_MOVE_CHOP_ABSBR - command Pacs_DMC_MOVE_CHOP_RELBR

  mode PHOT_spu_reset_OBS calling procedure PHOT_spu_reset ---> bolometer data flow stoppedBR

2.4.4. Take data with pre-defined OBCPs

• mode PHOT_spu_setup_OBS calling procedure PHOT_spu_setup ---> bolometer data flow running BR

  • - block OBCP_chopped_photometry_OBSBR - block OBCP_phot_chopper_scan_OBSBR - block OBCP_fixed_fixed_photo_OBSBR

  mode PHOT_spu_reset_OBS calling procedure PHOT_spu_reset ---> bolometer data flow stopped BR or

  mode PHOT_spu_setup_OBS calling procedure PHOT_spu_setup ---> bolometer data flow running BR

  • - mode PHOT_all_aots_OBS calling the following procedures:BR

    • - procedure OBCP_chopped_photometryBR - procedure OBCP_chopped_photometry_ditherBR - procedure OBCP_phot_freezeframeBR - procedure OBCP_phot_cal_IBR - procedure OBCP_phot_cal_IIBR - procedure OBCP_phot_cal_IIIBR - procedure OBCP_phot_staringBR - procedure OBCP_phot_chopper_scanBR - procedure OBCP_fixed_fixed_photoBR

  mode PHOT_spu_reset_OBS calling procedure PHOT_spu_reset ---> bolometer data flow stopped BR

Note: all OBCPs can be started with default parameters via the generic tcl-script; the key-OBCPs can also be started with freely selectable parameters via specific tcl-scripts

2.4.5. 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

Note: the default OBCP for point-source photometry will probably be the OBCP_fixed_fixed_photo.

2.5. Reset after photometer operation

• PACS is in PHOTOMETRY or any other mode

• execute mode PHOT_switchoff_groups_OBS calling procedure PHOT_switchoff_groups (this will reset the biases sequentially, disable the AF 17, and switch off the groups)

• going into SAFE mode (this will disable the AF 14 for the FPU temperature checks)
• after execution: PACS is in SAFE mode (groups are off, temperature sensors on, AF 6 enabled to check for the communication between DMC and BOLC)

2.6. Instrument switch-off

• currently done with the tcl-script PACS_Switch_Off.tcl (maintained by FGB) (this will disable the AF 6 for the DMC-BOLC communication check)

• after execution: PACS is switched off

3. NOTES

• the SFT tests are described in PACS-ME-TP-007

• 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 library
• the AOT related CUS-scripts are still under testing