Welcome to the NP04/protoDUNE-SP Slow Controls TWiki Home page

Useful links


To access the slow controls, you will need to ensure you are members of this (these) e-group(s):

Group Purpose E-Group
NP04 DCS Operator e-group np04-dcs-operator
NP04 DCS Expert e-group* np04-dcs-experts

*Shifters need not join the expert e-group. Join only if you know you are an expert.

For a full description of the e-groups, please go here.

Slow Controls Computer

Which one?

Because the slow controls are isolated from the outside world, they are only accessible from one particular computer in the control room. The designated slow controls computer is the one second from the left (3rd and 4th monitors on the tables), as you are facing the monitors on the wall. This is labelled as CWO-NP04-CR1 on the monitors.

By default, the computer should be on, logged in and have the DCS application open. If not, follow the steps bellow.

Computer not logged in?

If you find that the computer is not logged in, you can find the password and username conveniently located on a post-it note below the monitors. Please do not lose this.

Are the slow controls not open, or did it crash?

If you find that the slow controls crash, or are simply not open upon login, you can remedy this by clicking on the 'smiley face' icon on the far left of the desktop. This should be labelled as NP04 DCS. You can choose a single or double interface depending on how many items need to be looked at.

When you (re)open the slow controls interface, you will need to login also. To do this select the key highlighted below.

Using the Slow Controls

Main Window

When you start the slow controls, you will be presented with the main overview of the detector. It should be kept open at all times.


1. Refresh button. If the page appears to be frozen or is not loading properly, click on this to refresh the page.
2. Home button. This will return to the main overview, which should always be visible.
3. Navigation menu.
4. Snapshot button. This allows you take a snapshot of the panel currently displayed. You can chose to save locally or send the snapshot by email. You must be logged in for the email option to work.
5. Log in / log out window. Clicking on the key icon allows you to log in with your CERN account. You must be part of the operator e-group and/or the expert e-group. Right-click on the key icon and select log out once you are done with your shift or done with any operation that required control permissions.
6.Trend tree menu.

All alarms are visible from this main panel. The alarms will flash red on the corresponding system until the operator acknowledges them (implementation in progress). They are also shown on the top part of the display.

  • Cryogenic system
In this frame you can see the LAr level read from our 2 levelmeters: capacitive levelmeter read in mm and differential pressure levelmeter, read in % of the total height of the cryostat (7.88m).

  • Beam line info (in construction)
Current beam energy and counts are displayed here.

  • Beam plug
Under construction.

  • Power control
See power control section.

  • Purity monitor
The last electron lifetime measurement is displayed for each of the 3 purity monitors. Click on the image to see more details.

  • Dynamic and Static temperature gradients
The average of the temperatures at 3 different heights is shows. For the full list of temperature readings, click on the corresponding tgrad image.

  • TPC
The TPC has been divided into top ground planes + temperature sensors, TPC barrel (on which each APA can be individually selected) + cathode HV, and bottom ground plane current monitors + floor/pipes temperature sensors. For the top, and average of all temperature sensors is shown. For the bottom (under construction)

Navigation Panel

The navigation panel allows you to open up the interfaces that are not directly accessible through the main overview, in particular the expert panels which allow you to change the settings and configurations of the different systems. To open the navigation panel, click the 'parrot/sailboat' icon on the top navigation bar:

Once you have clicked on the 'parrot' the window shown below, should open up somewhere on screen. The image below also highlights key detector systems that you will most likely be interested in monitoring. These systems are detailed in their respective sections found below.
OM_Navigation.png Test test blabla

Detector Power Control

If you select 'Detector Power Control' from the navigation panel, you will be presented with a new window:

The image of the detector is interactive, with the clickable areas are highlighted below. Clicking on each of these areas will bring up the control options for that respective APA (as indicated by the DaS/RaS - DS/MS/US labels). Let us select the DaS - DS APA.

Once you have selected the APA, you will be presented with various controls to the right of the detector image.

CE Low Voltage:

Photon Detectors:

Calibration Modules:

Wire Bias:

Field Cage:

Selecting the RaS - US and the DaS - US APAs will provide an extra control system.

Impedance Monitor


Beam Plug



Purity Monitor

There are 3 purity monitors in the detector. They should be used every ~6 hours.

Trend Tree





There are a number of webpages that also display information regarding the detector that you find useful. The webpages are:
  • *


Because the DCS computer does not have access to the outside world, you cannot simply take a normal screenshot and email it to yourself or post it directly to the elog.

1. Use the built-in snapshot options and chose send by e-mail. You must be logged in with your CERN account for this to work.

2. Use the import command from a console. This allows you to select any section of the screen to include as many panels as you want.

import PATH/TO/FILE/myfile.png
Draw a rectangle on the screen with the mouse around the area you want to take a screenshot of. As soon as you release the mouse the image will be created. It is preferable to save the file in the following path (to make sure you can retrieve it later)

To retrieve the file, use secure copy from your preferred location.

scp mycernusername@lxplus.cern.ch:/PATH/TO/FILE/myfile.png /LOCAL/PATH/myfile.png
If you get the message 'Permission denied', use the np04dcs account instead of your own account (password located by the DCS computer).

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Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng BeamPlug.png r1 manage 132.7 K 2018-08-20 - 09:11 JamesBryanEdgarPillow  
PNGpng DPC1.png r1 manage 285.3 K 2018-08-20 - 08:45 JamesBryanEdgarPillow  
PNGpng DPC1Arrows.png r1 manage 335.5 K 2018-08-20 - 08:45 JamesBryanEdgarPillow  
PNGpng DPC2Arrows.png r1 manage 486.1 K 2018-08-23 - 09:51 JamesBryanEdgarPillow  
PNGpng DPC3Arrows.png r1 manage 496.8 K 2018-08-23 - 09:51 JamesBryanEdgarPillow  
PNGpng MainWindow.png r1 manage 628.0 K 2018-08-17 - 10:39 JamesBryanEdgarPillow  
PDFpdf NP04_DCS_Power_Cut_Procedure_07082019.pdf r1 manage 1821.9 K 2019-08-12 - 12:11 RolandSipos NP04 DCS power-cut recovery procedure
PNGpng OM_MainOverview.png r1 manage 284.0 K 2018-09-27 - 16:11 FlorDeMariaBlaszczyk  
PNGpng OM_Navigation.png r1 manage 6.9 K 2018-10-04 - 11:51 FlorDeMariaBlaszczyk  
PNGpng Screenshot_2018-08-16_16-44-35.png r1 manage 637.2 K 2018-08-17 - 09:03 JamesBryanEdgarPillow  
PNGpng navPanelColours.png r1 manage 32.3 K 2018-08-17 - 10:31 JamesBryanEdgarPillow  
PNGpng purityMonitor.png r1 manage 110.2 K 2018-08-20 - 09:11 JamesBryanEdgarPillow  
PNGpng topBarHome.png r1 manage 48.2 K 2018-08-17 - 10:39 JamesBryanEdgarPillow  
PNGpng topBarLogin.png r1 manage 44.8 K 2018-08-23 - 10:10 JamesBryanEdgarPillow  
PNGpng topBarNav.png r1 manage 47.3 K 2018-08-17 - 10:39 JamesBryanEdgarPillow  
PNGpng topBarTrend.png r1 manage 50.1 K 2018-08-17 - 10:39 JamesBryanEdgarPillow  
PNGpng trendTree.png r1 manage 19.4 K 2018-08-17 - 10:31 JamesBryanEdgarPillow  
PNGpng wienerArrow.png r1 manage 105.1 K 2018-08-20 - 08:45 JamesBryanEdgarPillow  
PNGpng zMonitor.png r1 manage 15.2 K 2018-08-20 - 08:45 JamesBryanEdgarPillow  
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