Difference between revisions of "Checklist maintenance (HCO) Expert"

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(Checklist maintenance)
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necessary to pull the reset (green) switch forward that is accessed through the hole on the side of the chiller closest to the front.
 
necessary to pull the reset (green) switch forward that is accessed through the hole on the side of the chiller closest to the front.
  
==LED Runs for BCAL Checklist==
 
 
===LED Data Runs===
 
 
Up to now, the DAQ runs are taken independently using the local master trigger interface (TI) for north and south, but should be consolidated by feeding the LED triggers to the trigger supervisor (TS).
 
* The checklist entries for the 2015 spring commissioning run are recorded in Log Entries [https://logbooks.jlab.org/entry/3322823 3322823] and [https://logbooks.jlab.org/entry/3322905 3322905].
 
* The checklist entry for the fall 2014 commissioning run is recorded in Log Entry [https://logbooks.jlab.org/entry/3297440 3297440].
 
 
Data were first taken with all LEDs on so that the timing could be checked. Once offsets were adjusted, data were taken using Orlando's script (BCAL_test.py) to pulse the LED.  (More information can be found at [https://halldweb.jlab.org/wiki/index.php/Barrel_Calorimeter BCAL DAQ Instructions]). The following procedure was followed.
 
# Make sure that SiPM and LED voltages are off
 
#* Turn off SiPM bias voltage
 
#* Turn off LED bias voltage
 
#* Make sure no triggers are enabled or running.
 
# Start [[Data Acquisition Shift | DAQ system]].
 
#* Complete prestart/start sequence, leaving system ready and waiting for triggers
 
# Open a terminal and login to hdops@gluon02-05
 
#* cd $DAQ_HOME/tools/bcal_pulse_sequence
 
#* BCAL_test.py -s U -q 2,3 -n 10 -b 7    // Run the south side, upstream LED pulser, quadrants 2 and 3, 10 pulses per setting and (large) bias of 7 V.
 
#* BCAL_test.py -s D -q 1,4 -n 10 -b 7      // Same for north side, downstream LED pulser, quadrants 1 and 4, 10 pulses per setting and (large) bias of 7 V.
 
#* BCAL_test.py –h                                    // Help option
 
# The script with the above arguments should loop through a total of 320 triggers (10 pulses x 4 voltages x 4 columns x 2 quadrants).
 
#* End run
 
 
===Status Occupancy Plots===
 
 
After the raw data were taken, the following procedure was used to generate root files starting from the /gluex/Subsystems/BCAL/data/ directory:
 
 
# generate root file to dump wave forms
 
#* hd_root -PPLUGINS=DAQTree /gluonraid2/rawdata/active/RunPeriod-2015-01/rawdata/Run002514/hd_rawdata_002514_000.evio -o /gluex/Subsystems/BCAL/rootfiles/hd_rawdata_002514_000.root
 
#* display waveforms
 
#* root [0] .L /gluex/Subsystems/BCAL/scripts/dump_tree_waveform_dalton.C+
 
#* root [0] dump_tree_waveform_dalton("/gluex/Subsystems/BCAL/rootfiles/hd_rawdata_002514_000.root");
 
# generate root file to create occupancy plots
 
#* hd_root -PPLUGINS=DAQTreeBCAL /gluonraid2/rawdata/active/RunPeriod-2015-01/rawdata/Run002514/hd_rawdata_002514_000.evio -o /gluex/Subsystems/BCAL/rootfiles/hd_rawdata_002514_000_status.root
 
#* create occupancy plot for FADCs
 
#* root [0] .L /gluex/Subsystems/BCAL/scripts/SiPM_Test_fADC.C+
 
#* root [0] SiPM_Test_fADC("/gluex/Subsystems/BCAL/rootfiles/hd_rawdata_002514_000_status.root");
 
#* root [0] c1->SaveAs("/gluex/Subsystems/BCAL/plots/LED_status/hd_bcal_n-led_up_mode8-ADC_R2514.pdf");
 
# create occupancy plot for TDCs
 
#* root [0] .L /gluex/Subsystems/BCAL/scripts/SiPM_Test_TDC.C+
 
#* root [0] SiPM_Test_TDC("/gluex/Subsystems/BCAL/rootfiles/hd_rawdata_002514_000_status.root");
 
#* root [0] c1->SaveAs("/gluex/Subsystems/BCAL/plots/LED_status/hd_bcal_n-led_up_mode8-TDC_R2514.pdf");
 
 
== Remote Control PDU ==
 
 
[[Image:PDU_web_interface.png | thumb | 400px | Fig. 2.  Screen shot of the PDU web interface.]]
 
 
 
The bias (ISEG) and low voltage (MPOD) supplies providing power to the SiPMs are plugged into remotely controllable power distribution units (PDUs). This allows us to recycle the power to the crates via a web interface. Each of the four ISEG/MPOD crates is plugged into its own PDU. At the present time, only the first output of the distribution strip is used. The following PDUs are being used, given by the name of the rack followed by -pdu.
 
* n1-1-pdu
 
* n1-6-pdu
 
* s1-1-pdu
 
* s1-6-pdu
 
The remote access to the crate is via a web browser in the Counting House pointing to the name of the PDU (e.g. type s1-1-pdu into browser and confirm with user/pass=admin/admin). See the screen shot of the web interface. To cycle the power
 
* Click on the Actions, then Loads button.
 
* Highlight the first line (Load 1). The On/Off/Cycle buttons should become enabled
 
* Click on the Off and confirm preference. It will take about half a minute to complete the command (patience!). After "Output Current Changed" message appears under Alarm Status, the status should turn from 'On' to 'Off', then message disappears.
 
* Repeat reverse action to turn PDU input back on.
 
 
== External Cosmic-Ray Trigger ==
 
The external cosmic-ray trigger was setup using some scintillation counters located above and below the magnet yoke to signal the passing of cosmic rays through the central detectors.
 
[https://logbooks.jlab.org/entry/3275972 Log Entry 3275972] and [https://logbooks.jlab.org/entry/3285969 Log Entry 3285969] contain detailed information about the setup.
 
To control the high voltage using the CAEN power supply use the following procedure starting from a terminal on the local network:
 
* telnet u1-9-top 1527
 
* login: user/user
 
* Use 'tab' to move from one column menu heading to another.
 
* Use keypad 'up' and 'down' arrows to select submenus under the header. Select Main/Channels to view voltages.
 
* Use 'tab' to move back to Main menu, 'down' key to 'Log Out' and exit
 
  
 
== Expert personnel ==
 
== Expert personnel ==
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  {| border=1  
 
  {| border=1  
|+ Table:  Expert personnel for the BCAL system
+
|+ Table:  Expert personnel for the HCO system
 
|- bgcolor=#DFDFDF   
 
|- bgcolor=#DFDFDF   
 
! width=200px | Name    !!  width=100px | Extension !! Date of qualification  
 
! width=200px | Name    !!  width=100px | Extension !! Date of qualification  
 
|-
 
|-
| Elton Smith    ||  align=center | 269-7625  ||  align=center | May 20, 2014
+
| Elton Smith    ||  align=center | 269-7625  ||  align=center | January, 2015
 +
| Ryan Slominski ||  align=center | 269-7625  ||  align=center |
 +
| Theo Larrieu ||  align=center | 269-7625  ||  align=center |
 
  |}
 
  |}

Revision as of 13:11, 21 December 2015

Checklist maintenance

Hall D is using the accelerator-developed system of checklists, commonly referred to as the hot checkout (HCO). The system is driven by a web-based interface with many features that can be discovered interactively. However, there are a few infrequent actions that require specific instructions. Note that some of these require special permissions, not generally granted.

Routine operation

Instructions for shift personnel are available in the Barrel Calorimeter instructions for shift personnel.

Saving and Comparing Save/Restore Files

Specific voltage settings can be saved (from electronics to file) or restored (from file to electronics). This is done via the "Save/Restore" button on the top right of the GUI. The files are automatically saved with the date/time to /gluex/data/burt/voltages/BCAL_BIAS/. We have renamed the files incorporating the date/time temperature and 10 times the overvoltage (to avoid an additional "." in the name). A soft link is created in that directory to point to the nominal file for the current run. The voltages from different files can be compared using the script compare_snap_voltages.C which is located in /gluex/Subsystems/BCAL/scripts.

Chiller Operation

The chiller temperature should be set to 2 degC less than the desired SiPM temperature. The chillers are normally in 'remote' mode. (You can still change the temperature manually). To change the 'set' temperature, use the up/down arrows on the front key pad to the desired temperature. The values are in deg F. Wait for the 'readback' temperature to settle to the 'set' value, as it may overshoot at first. At startup it may be necessary to pull the reset (green) switch forward that is accessed through the hole on the side of the chiller closest to the front.


Expert personnel

The individuals responsible for checking that the BCAL is ready to take data and setting its operating parameters are shown in following table. Problems with normal operation of the BCAL should be referred to those individuals and any changes to their settings must be approved by them. Additional experts may be trained by the system owner and their name and date added to this table.

Table: Expert personnel for the HCO system
Name Extension Date of qualification
Elton Smith 269-7625 January, 2015 Ryan Slominski 269-7625 Theo Larrieu 269-7625