Shifter Instructions

Starting the DCS Monitor

  • (Re)Start the monitor by double-clicking the "OPICSS" icon in the bottom right screen of
  • Wait until the "DCS Start-up and Configuration" page opens, this could take up to 30 seconds.
  • Execute step 1 ("START/Check DCS") and make sure that the indicator turns green. If it does not, there is a problem.
  • If you are instructed to turn on the cooling, you can execute step 2.
  • Make sure the indicator in step 2 is green regardless of whether you started the cooling. If it is not, there is a problem.
  • Step 3 will then take you to the APD Temperature Monitor Overview.

The APD Temperature Monitor

If any of the individual APDs on the NDOS overview turn red, there is a problem. You can get more detail by clicking on a DCM to get to the DCM overview, which gives the APD temperature, TEC drive current, and FEB temperature for each FEB.

Note that the monitor is currently not able to properly monitor all FEBs during a DSO scan and when the detector is initially being cooled (within the first two minutes). In other words, when you run the cooling script, give the FEBs two minutes to come within range. If there are still FEBs in alarm after that, there is a problem.

Monitoring Power Supplies

The ACNET system monitors a many different variables, which can be viewed anywhere using the synoptic page. Synoptic is a client-server system for graphical data representation.
It is similar to ACNET Lex SA and EPICS EDM applications.
The displays can run either within a Java application, or in a conventional web browser as "live" SVG images. In a web page mode internet browser generates .svg images of the displays, so you will not be able to
get access to the displays with the control/set capabilities. Live web pages are intended for the quick review of the detector status.
Gaining control/set capabilities requires Java Runtime Environment.

Below is the list of pages, from which you can access the synoptic displays for NDOS, Near and Far Detectors.

The synoptic pages are always running in the control room, and a DCS expert as well as the shifter should be familiar with the synoptic pages and what is displayed on them.
The ACNET server computers are novadcs-far-readout-0X where X is 1, 2, 3, or 4. There is also a data logger for viewing historical data (DocDB # 8900 or the Sensor-log Analysis expert's page here).

If for some reason these pages are not running in the control room or you need to recover after a crash:

1. Go to * address from the web browser (for NDOS and Near Detector only).
2. Click Launch Viewer from the left panel. This will prompt to start a java application.
3. Start the Java application.
4. Hit 'Cancel' if prompted to open displays. Hit the "Download & Open" button in the main Synoptic viewer window.
5. Select appropriate folder: Nova_NDOS or Nova_Near in the browser.
6. Select NDOSIndex (for NDOS) or Displays (for Near Detector).
7. Open all windows by clicking the links.

For the Far Detector DCS monitor recovery:
1. Go to * address from the web browser (for FAR Detector only).
Repeat ALL the steps from 2-7 above.

Shifter instructions with screenshots for NOVA power supply controls through DCS can be found in Shifter_instructions_PS_control.pdf (DocDB # 8209 by Athans).
From the main summary display you can pick the PS view you need: LV, HV, by Di-Block, by Channel. To be able to reset power or make any changes to LV or HV, the first thing to do is to "Enable" controls. This is done by clicking the "Enable" button at the lower right corner of the window . Select the time span you need to make changes (10 min, 1 hour etc.). Make sure to "Turn off" the controls once you are done to prevent any accidental changes from the window.

Below are the screenshot images from document DocDB # 8209 showing how to (Re)Start Synoptic displays and enable controls.

Each LV and HV channel is monitored by 18 parameters. The first 12 parameters are just status monitors: Green is 'ON' and Red is 'OFF' four ON/OFF status button. For the rest of the parameters Green means Normal and RED means an 'ALARM'.
Parameters 13-18 have set values that are shown in corresponding boxes. The 'ON/OFF' control buttons are used to recycle the power on a particular channel. For LV the power can be recycled either by 'ON/OFF' control buttons for a single channel or by 'ON/OFF' crate master switch control buttons. Crate switches should be used with Expert's supervision.
This will recycle both 3.5 V and 24 V power on all channels supported by the crate.

Few things you need to know regarding the power supply displays.

1. The figure below shows the definitions of acronyms in the alarm tree display for Muon Catcher. The acronyms are the same for all alarm tree displays for NDOS, Near and Far Detectors.

2. In a single channel view displays you can also see the graphical view of each variable. The 0. s mark on the time axis represents the moment the display was originated. Negative times correspond to the history in the past.
If the channel is turned off properly without problem, than the corresponding values of the variables in the graphs will be 0. On the other hand, if the channel is turned off automatically due to an ALARM, the graphs will retain the very last value of the variable that channel had right before it went into ALARM. It is done intentionally for troubleshooting purposes. What this means is that you will see that the channel is OFF and yet the graphs will show some non zero value for Voltage, Current etc.

3. Sometimes it is necessary to turn the power supplies completely OFF for safety reasons in order to do maintenance or repair work after leaks. This automatically will set ALL voltages to zero.
If you need to restore the power to a diblock or the entire Detector make sure to check the 'Voltage Set' values (pink column). The system is set up in such away that it will automatically restore the set values for the LV (3.5V and 24V ), but it will not restore the HV (425V). High voltage set values have to be restored manually.

4. Shifter is NOT allowed to DISABLE any of the alarms without expert supervision.

Known Problems

Please take a look at our Issue Page for the currently known problems and feel free to add requests for features or report bugs.