Revision 11 as of 2015-06-10 10:02:31

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Campaigns in 2015 :

We had a TB period of about 1 week in February at DESY in a 3 GeV electron beam. The Setup was 5 big layers (Layer 12, 13, 14, 15 and one special layer composed of the 2 new ITEP boards and the SMD Mainz board) in an airstack configuration using the tungsten frames. The goal of this testbeam was to get a MIP Calibration for the outer tiles of theses layers and cross-check few things from CERN PS Testbeam.

In overall, the testbeam was a success. Thanks to it, we can get a light yield measure for the new Mainz board, cross-check results with the ones at CERN and get a better understanding of the electronics. One change was operated on the Layer 13. As we observed that the gain for that layer was too low at CERN, we decided to change the pre-amplifier values to lower values.


DESY Feb 2015




275fF -> 250fF





Daily runs of LED and Pedestal were made to check stability.

Remark : The reconstruction software from October/November CERN TB still works just the database paths and the processor Ahc2Calibrate needs to be modified!!! The source file is available here : Ahc2CalibrateProcessor

A list of remarks, comments and runs is available here.


Another week of Testbeam at DESY. The setup was composed of 5 Layers in the tungstene frames, everything in the Airstack. The Layer disposition was the following : Module 12, Module 13, Module 14, Modules ITEP (10 and 11 in a single slab in the top part of the frame!) and Module Mainz (also in the top part of the frame in the right corner). The goal was to calibrate further the board (specially ITEP and Mainz with new voltage settings), another goal was to understand further the stuck TDCs especially in the Module 14 and test the very first version of the quasi-online monitor. In overall, this was a success especially running with the EUDAQ, except for stuck TDCs. Concerning calibration, stability with the gain is now achieved and the Ketek Module are now at the right settings.

As usual, a list of remarks is available on the online elog.[here