DESY 2017-06 SiW ECAL "10 SLABs"

Test 10 Short SLAB's in flexible frame, at DESY.

This page is a copy of SiWCERN201511. It can be edited by the members of the SiWDESY201706Group .


Responsabilities & Contacts

Contacts admin Vincent Boudry +33 6 7131 0577,

Coordinator: Adrián Irles
Technical Coordinator: Frédéric Magniette

e-group of TB-participants: ( Management link)




Pre-Expedition planning


Materials & Logistics

Talks, proceedings and papers

Articles and Proceedings Repository:



Beam test area


Harwdare status and detector configuration


Information about the slabs is in

For example, if one looks into will see:


FEV11 n°33

SMBV4b n°11

Then, the PCB n° 33, corresponds to the row 5 of the table table, and the wafers Wafers n° 10 13 15 14

There is also an ASU table (PCB+Wafer)


Spill settings: 5Hz, 3.7ms width: 0.9 (start acq) + 0.5 (val evt) + 2.3 ms (real spill) Trigger thresholds: >230 for all chips (set in the commissioning procedure). Choice done chip-wise. Standard acquisition: 30 minutes per point.

Some re-masking of single channels has been done during the calibration. The final xml configuration file is used for all the other runs (showers, angle, magnet) with no further changes.

  • SETUP:

The slab ordering shown above was kept unchanged for all the testbeam except at the end, when the first layer was moved out from the begining of the detector to the other beam area, TB24/2 with the PCMag.

Summary of masked channels: Total # of channels not masked --> 6204 (87%)

Layer 1, Slab 21 → 43.4% (one wafer) Layer 2 – 6 , slabs 16,-20 ~6-8% Layer 7, slab 22, ~ 16% (one chip)

5% are masked manually just before starting the commissioning → same patter in all slabs: Chn 37 in all chips, Chn 41-53, chips 1,9 Chn 5, chips 0 and 8 Chn 3, 9, 10, chip 7 and 15

The trigger threshold were set chip-wise as the maximum of the scurve threshold + 5 sigmas or 225 DAC.

Physics program

The data taking program consisted in the MIP calibration using 3GeV positrons, the shower using different energy positrons and different width of tungnsten between the slabs, a mip run with the detector in an angle of ~45 degrees with respect the beam and a set of runs of single slab (21) inside the magnetic field.

MIP calibration using positrons

Shower Program

Magnetic field tests

MIPs at 45 degress


Check the pageabove for analysis tools and the dedicated BT analysis internal meetings:


-- VincentBoudry - 2017-06

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf poster_v6.pdf r1 manage 10074.8 K 2017-11-04 - 17:00 AdrianIrles  
PNGpng slab_ordering.png r1 manage 40.4 K 2017-07-04 - 17:27 AdrianIrles SETUP
XMLxml testbeam_2017_7slabs_5Hz_3.7ms_planeevents32.xml r1 manage 368.0 K 2017-07-04 - 17:12 AdrianIrles xml configuration file for the detector
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Topic revision: r44 - 2020-05-19 - VincentBoudry
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