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 might change! (**) the gain setting can be 'high' or 'low'
- 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: At the end of the PHOT_setup 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]
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
Logic chooses and issues a pointing mode out of:BR
- WriteOBSIDBR - PacsPhotSlewCalBR
- 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