1. PACS bolometer operation from the commanding point of view


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

Index TableOfContents(2)


2. Short functional tests (PhFPU related)


2.1. SFT Warm: Sorption Cooler and Bolometer detector chain

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

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

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

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

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


3. Nominal operations


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

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

3.2. Cooler recycling (only at HeII temperatures)

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

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

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.

3.4. Operation of the bolometers (starting out of '''Photometry mode''')

3.4.1. start/stop of bolometer data flow

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

3.4.3. Take data with manual chopper & filter movements

Note: PACS_fltw_move_OBS can be called via a specific tcl-script where the filter has to be specified.

3.4.4. Take data with pre-defined OBCPs

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

3.4.5. Execute AOT observations

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

3.5. Reset after photometer operation

3.6. Instrument switch-off


4. NOTES