PACS spectrometer operation from the commanding point of view

T. Mueller, D. Cesarsky; 10-Nov-2006

Index

1. Short Functional Tests (Ge:Ga-detector related)

1.1. SFT Warm: Heater, flasher and Ge:Ga detector chain

• see PACS-ME-TP-007

1.2. SFT at HeI: Heater, flasher and Ge:Ga detector chain

• see PACS-ME-TP-007

1.3. SFT at HeII: Heater, flasher and Ge:Ga detector chain

• see PACS-ME-TP-007

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

2.2. General Setup for Spectrometer Operation

• starting out of SAFE mode

• mode SPEC_setup_OBS calling the block SPEC_setup, calling the following CUS procedures:

  • procedure SPEC_dpu_dmc_setup (hk-list, rec_opt, fpga)
  • procedure SPEC_init_det_setup (initial detector setup, including switch-on of the SPECs and the correct selection of the CREs)
  • procedure SPEC_CRE_setup
  • procedure SPEC_dmc_setup
    • procedure SPEC_fltw_conf
    • procedure SPEC_fltw_move
    • procedure CONF_chopper
    • procedure CHOP_on_off
    • procedure CONF_cs
    • procedure CS_on_off
    • procedure CS_temp
    • procedure CONF_grating
  • procedure SPEC_spu_setup
  • AF5 enabled

• ending up in Spectroscopy mode, but SPU processing has not yet started

• default SPU mode: slope fitting for 64 readouts per ramp, no sub-ramps, default compression mode
• filter is in position "A",
• chopper enabled and at position "0"
• grating is homed (with 1deg/sec, neg. direction) and enabled for nominal operations with a speed of 4deg/sec and positioned at 500000
• calibration sources are set to default values (takes about 40-50 min stabilisation time)
• blue detector heater is switched on and a current of 1.5 mA is applied (takes about 20 min stablisation time)
• Autonomy function 5 "COUNTER_SPEC" is enabled

2.3. Operation of the spectrometers (starting out of '''Spectroscopy mode''')

2.3.1. start/stop of bolometer data flow

• mode SPEC_spu_setup_OBS calling procedure SPEC_spu_setup ---> spectrometer data flow running

• mode SPEC_spu_reset_OBS calling procedure SPEC_spu_reset ---> spectrometer data flow stopped

• for modified SPU settings: SPEC_spu_setup_OBS.tcl <parameters>

2.3.2. Take data with manual chopper, grating & filter movements

• mode SPEC_spu_setup_OBS calling procedure SPEC_spu_setup ---> spectrometer data flow running

  • mode PACS_fltw_move_OBS calling procedure SPEC_fltw_move (or PHOT_fltw_move)

  • or command Pacs_DMC_MOVE_CHOP_ABS

  • or command Pacs_DMC_MOVE_CHOP_REL

  • or command Pacs_DMC_MOVE_GRAT_ABS

  • or command Pacs_DMC_MOVE_GRAT_REL

• mode SPEC_spu_reset_OBS calling procedure SPEC_spu_reset ---> spectrometer data flow stopped

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

2.3.3. Take data with pre-defined OBCPs

• mode OBCP_chop_scan_spec_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • procedure SPEC_fltw_move

  • block OBCP_chop_scan_spec

  • procedure SPEC_fltw_move

  • block OBCP_chop_scan_spec

  • procedure SPEC_fltw_move

  • procedure SPEC_spu_reset

• mode OBCP_grat_scan_nochop_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • block OBCP_grat_scan_nochop

  • procedure SPEC_spu_reset

• mode OBCP_spec_2_3_chop_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • block OBCP_spec_2_3_chop

  • procedure SPEC_spu_reset

• mode OBCP_grat_line_scan_chop_2_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • block OBCP_grat_line_scan_chop_2

  • procedure SPEC_spu_reset

• mode OBCP_gra_scan_chop2_fast_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • block OBCP_gra_scan_chop2_fast

  • procedure SPEC_spu_reset

• mode OBCP_spec_freq_switch_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • block OBCP_spec_freq_switch

  • procedure SPEC_spu_reset

• mode OBCP_chop_grat_scan_cal_OBS calling blocks/procedures:

  • procedure SPEC_spu_setup

  • block OBCP_chop_grat_scan_cal

  • procedure SPEC_spu_reset

• mode SPEC_all_aots_OBS calling the following blocks/procedures:

  • procedure SPEC_spu_setup

  • procedure SPEC_fltw_move

  • block OBCP_spec_2_3_chop

  • block OBCP_spec_2_3_chop_dither

  • block OBCP_grat_line_scan_chop_2

  • block OBCP_grat_scan_chop2_fast

  • block OBCP_grat_scan_nochop

  • block OBCP_spec_2_3_chop

  • block OBCP_chop_grat_scan_cal

  • block OBCP_chop_scan_spec

  • block OBCP_spec_freq_switch

  • procedure SPEC_fltw_move

  • block OBCP_spec_2_3_chop

  • block OBCP_spec_2_3_chop_dither

  • block OBCP_grat_line_scan_chop_2

  • block OBCP_grat_scan_chop2_fast

  • block OBCP_grat_scan_nochop

  • block OBCP_spec_2_3_chop

  • block OBCP_chop_grat_scan_cal

  • block OBCP_chop_scan_spec

  • block OBCP_spec_freq_switch

  • procedure SPEC_fltw_move

  • procedure SPEC_spu_reset

Note: all these modes 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

2.3.4. Execute AOT observations

• CUS scripts (to be finalised):
  

2.4. Reset after spectrometer operation

• PACS is in SPECTROSCOPY

• execute mode SAFE mode

2.5. Instrument switch-off

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

• after execution: PACS is switched off

3. Specific Spectrometer Tests

3.1. Thermal Behaviour Test

• starting out of SAFE mode

• mode SPEC_thermal_OBS calling the following blocks/procedures:

  • procedure SPEC_dpu_dmc_setup

  • procedure SPEC_init_det_setup

  • procedure SPEC_CRE_setup

  • procedure SPEC_heater_setup

  • procedure SPEC_fltw_conf

  • procedure SPEC_fltw_move

  • procedure CONF_chopper

  • procedure CHOP_on_off

  • procedure CONF_grating

  • block OBCP_spec_2_3_chop (3x)

  • procedure CONF_cs

  • procedure CS_on_off

  • procedure CS_temp

  • individual commands to switch-off SPECs and DECs in a time-delayed way

  • procedure OBCP_SAFE

• ending up in SAFE mode

3.2. SPU Modes & Detector Selection Tests

3.3. Other Tests

4. NOTES

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

• some specific spectrometer tests, like the thermal behaviour measurement, start directly out of SAFE mode, while most of the tests will be executed after the SPEC_setup_OBS when the instrument is in Spectroscoy mode

• 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