UT Test Beam Datataking

Information for Shifters

Information on DAQ PC (pcsyr01)

The pcsyr01 is running SLC 6.5 Linux OS and has a large (~ 4 TB) local disk to store data files. NOTE! root and the user ( tboperator) passwords are displayed on a label that is put on the machine front panel. During the data taking shifters should use the tboperator account only!

DAQ PC storage layout

The DAQ machine have installed 3 physical hard drives. Two of them are small (~ 250 GB) and should not be used to store data/work/software installation. They contain OS and /home directory. The large disk is divided into three logical volumes (partitions) that are dedicated to software installation and data storage. The partitions names are as follow: /lhcb (~ 800 GB), /data1 (~ 1.5 TB) and /data2 (~ 1.5 TB). All the necessary software packages have been installed at /lhcb (Gaudi + DaVinci, Kepler, alibava). It is strongly recommended that any additional staff should be also installed there. Two remining partitions are dedicated for data files acquires during the data taking runs.

DAQ PC environment configuration

Presently the DAQ PC can run alibava and LHCb software (Gaudi framework, DaVinci v35r0 and the latest Kepler project). It should be kept in mind that a shifter should not mix running alibava gui and LHCb applications. The reason for this is that there may be subtle differences between the local ROOT installation and the one that is used by a particular version installed together with the LHCb stack. It is strongly advised then to start from a fresh terminal in order to use the LHCb software.

Running alibava

When starting a fresh shell a script set-ut-tb.sh will be executed by default. This will move the user to a working folder which contains symbolic links to the storage partitions /data1 and /data2 as well as link to the alibava-gui executable (for details how to run and operate the GUI see 'Starting the AlibavaGUI' below). NOTE that all necessary components needed from the ROOT will be taken from the local standalone installation (check the $ROOTSYS env variable).

Configuring the LHCb software

In order to get access to the local installation of the LHCb software do the following steps:

log on the DAQ machine as the tboperator (password can be found on the front panel of the machine)

Open the terminal. There are scripts in place which should provide you the tools necessary to run everything!

In the case of a problem, open a fresh terminal and execute:

 > cd 

 > source setlhcb 

 > SetupProject DaVinci v35r0 --build-env 

(this will take you to the /lhcb/tboperator/cmtuser/DaVinci_v35r0 folder)

 > SetupProject DaVinci v35r0 

You are ready to go now! (The Kepler project can be set up in the similar way)

Logging Into the Machine

As the setup has the Alibava motherboard and the connected PC inside of the control areai, you will need to ssh into the machine from the control room. Remember the -X or -Y flag. The login info is right next to the keyboard in the control room.

Starting the AlibavaGUI

After logging into the machine, you are ready to use the AlibavaGUI. At the command prompt, type


to start the AlibavaGUI. This should bring up the main controls for Alibava.

Data Format for Alibava files.

Alibava outputs many files, and in order to keep thing straight, the following convention for file type is used

Run-Type_ 6-digit-Run#_Date_Time.ali

So for run 000001 and pedistals, taken July 23 2014 at 11:07 am, the data files would be



Files are stored in a folder for each day, labeled as dd_mm (28_07, for example)

Additionally, for each run, there is a readme file in each of the folders.

This contains all the necessary information about beam conditions, run buffer size, etc.

Setting The Datafile to be Stored

In order to set the data file, click on the "LogData" button


After pressing this button, you will be directed to a user dialogue to change the input file. Please do not put anything on the 250 GB disk , this is only for the operating system. You should go to data1 or data2. At the dialogue, create a run folder, and there, enter the name of the file, following the above conventions.


When you're satisfied, click "Open". You must do this before each run, or you risk overwriting the data!!!

Telescope files directory

The telescope files are stored in the following directory:


After a run

After a run is done, make sure to:

  • Be sure to ask the VELO colleague about their run number, especially if you haven't done it yet!
  • Make sure to change the file for the next run.

Offline analysis

Some information on offline analysis can be found here: TbOfflineAnalysis

Help During a Run

If you absolutely need help, send an e-mail to lhcb-UT-testbeam@cernNOSPAMPLEASE.ch. Someone will be available to help.

There will be a phone to call, should something go wrong, or there is a list of numbers next to the keyboard.

Backups of online run log

This is a list of daily backups of the online run log, in case things go wrong.

-- AdamDavis - 23 Jul 2014

Plots from test beam

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng DUT_telescope_correlation.png r1 manage 59.8 K 2014-07-31 - 14:57 MarcoPetruzzo  
PDFpdf RunNumbersBackup29-7-14.pdf r1 manage 349.4 K 2014-07-29 - 01:33 AdamDavis  
PDFpdf RunNumbersBackup3-8-14.pdf r1 manage 322.2 K 2014-08-03 - 00:05 AdamDavis  
PDFpdf RunNumbersBackup30-7-14.pdf r1 manage 350.8 K 2014-07-30 - 01:31 AdamDavis  
PNGpng SignalPlots.png r1 manage 23.7 K 2014-08-01 - 23:58 StevenBlusk  
PNGpng alibava_gui_log_data.png r1 manage 203.8 K 2014-07-23 - 23:11 AdamDavis  
PNGpng alibava_gui_start_loggin.png r2 r1 manage 305.7 K 2014-07-23 - 23:13 AdamDavis  
PNGpng alibava_startup.png r1 manage 278.8 K 2014-07-23 - 23:04 AdamDavis  
Compressed Zip archivezip testbeam_Oct2014.zip r1 manage 41668.7 K 2014-10-27 - 17:16 PaoloGandini Pictures of October2014 testbeam
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Topic revision: r15 - 2014-10-27 - PaoloGandini
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