SciFi Tracker Test Beam 2014

Contact: Mark Tobin (GSM: 161858)

Aim of the test beam

  • Measure light yield and attenuation length of 2.5 m long, 13. cm wide fibre mats.
  • Read out with new Hamamatsu and Ketek devices.
  • Resolution.
  • Hit efficiency with 5 and 6 layer fibre mats. [optional]

Devices to test

  • 2 x 7 cm x 3 m modules from Aachen
  • 1 x 13 cm x 2.5 m module from Heidelberg
  • 1 x 13 cm x 1 m module from Heidelberg (removed 09/10 at 14.50)
  • 1 x 13 cm x 2.5 m 6 layer coverlay mat from CERN


  • EPFL:
    new hamamatsu devices mounted on flex. in production
    new ketek devices mounted on flex status unknown
  • Aachen:
    old hamamatsu devices on 128 channel hybrid.
  • Data acquisition: usbBoard, SPIROC, VATA.
Guido will send the completed EPFL electronics to Roman.


To be provided by Aachen. There is a comprehensive description of the proposed set up available in Roman Greim's presentation at the test beam kick-off meeting .

Linear table and mechanics

  1. Simple mechanical tables on rails, non-motorised. Allows for transverse displacement of arbitrary length. Rails to be mounted on concrete blocks. Tables can also be adjusted in height. Simple construction with limited precision. Contact person: Michael Jaeckel.
  2. So-called DESY tables. Allow for vertical and horizontal displacement by +/- 0.5 m. Motorised and remote-controlled. 1 table available for H8. Contact person: Michael Jaeckel.
  3. A 5 m long, relatively heavy, motorised rail with additional (optional) small xy-movement system. Could be easily shortened to 2.5 or 3 m. Rail is in PH storage and wasn't used for a long 3me. Status unknown. Would require some effort to make it operational, but could be a good longer term investment. Contact person Raphael Dumps.
  4. A 2 m long, less heavy, motorised rail. Contact person Iouri Guz.
There are some pictures of the different options here.

The "Rolls Royce" solution is option 3.


  • Order panels. done
  • Pray they arrive and can be made into modules.
  • Send packaged detectors from EPFL to Aachen. End of first week of September
  • Ship all equipment to CERN. Last week of September

Measurement plan

  1. Time alignment of telescope+DUTs to the beam (~ 1--2 days).
  2. Attenuation length scan 12(24) points, (10)5k+ events each in (20)10 cm steps along Y. Time: (4)8 hours
  3. Resolution: 500k+ events at 6 points along 40cm steps in Y. Time: 8 hours
  4. Vertical Scan: 500k events at 5 points along X in 2cm steps: Time: 7 hours
  5. (2nd week of test beam) Bias Voltage Scan: 500k events at 1 point, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 Volts over breakdown. Time: 8 hours

Running the data acquisition and beam control

  • HOWTO: How-to for online data taking
  • LOGBOOK: Copy and paste from the text based logbook.

Good beam profiles

Analog wire chambers profile Delay wire chambers profile
CESAR_GUI_0.20.1_09-Oct-14_21-54-05.png CESAR_GUI_0.20.1_09-Oct-14_21-52-57.png

Analysis software

The analysis software is in a git repository. Ask Roman for access.

Instructions for installing the software are available here.


The shift list can be found here.

Backing up the data to EOS

More information on EOS can be found on and

XROOTD must be installed on a local machine with OPENSSL and KERBEROS5 to move it there from EOS.

1. Copy the files from the server to the client machine (to /home/scifi_testbeam14/backup/testbeam_data/).

2. Open a terminal on the "scifionline" client machine. In the /backup/testbeam_data directory on the client where the files have been copied:

$ ls *.root > filelist.txt
$ xrootd -c xrootconfig.cfg # this starts the xroot server daemon. ctrl-c after to close it or add & to put in background.

3. Open a terminal on

$ eos ls -l /eos/lhcb/testbeam/scifi                    #lhcb-scifi-tracker-testbeam has write permission, lhcb has read
$ xrdcp root:// filelist.txt

4. On lxplus, create the following bash script '':

while read -r line
    xrdcp root://$name root://$name
    echo "copying $name to root://"
done < "$filename" 

5. Then run it there:

$ chmod a+x
$ ./ filelist.txt # it will not transfer or overwrite pre-existing files
$ eos ls -l /eos/lhcb/testbeam/scifi
Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng CESAR_GUI_0.20.1_09-Oct-14_21-52-57.png r1 manage 145.5 K 2014-10-09 - 22:15 MarkTobin Good beam profile with delay wire chambers
PNGpng CESAR_GUI_0.20.1_09-Oct-14_21-54-05.png r1 manage 107.8 K 2014-10-09 - 22:15 MarkTobin Good beam profile with analog wire chambers
How Toext HOWTO r2 r1 manage 2.1 K 2014-10-07 - 22:32 BlakeLeverington How-to for online data taking
PDFpdf LHCbSciFiTestBeamManual.pdf r1 manage 47.7 K 2014-10-07 - 20:27 BlakeLeverington Beam area and beam control instructions
PDFpdf Table_Options_2014.pdf r1 manage 1923.2 K 2014-08-12 - 16:03 MarkTobin Linear tables
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Topic revision: r13 - 2015-05-25 - BlakeLeverington
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