Minutes of the forward endcap EMC eZuce SRN meeting, 28th of August 2017, 14:00-14:45


  • Basel: Werner
  • Bochum: Cathrina, Claudius, Malte, Matthias, Miriam, Tobias, Tom
  • Bonn: Christoph, Merlin
  • Groningen: Myroslav
  • Stockholm: -
  • Uppsala: -
  • Giessen: Markus
  • GSI: -


  • Natalie agreed to look for the preamp gain measurements done in Basel in order to compare with Maltes test measurements on 14 pieces
  • However, Werner pointed out that some measurements may be flawed by bad contacts to the test station. Must be confirmed by checking the measurement results.
  • We therefore foresee to individually measure all preamp gains in a dedicated test stand at Bochum

Cosmics precalibration setup:

  • Merlin presented an estimation of the accuracy of the precalibration measurements in the cosmics test stands which comes out to about 2 %
  • This value presently goes up to 6.5 % if measurements of the same submodule are done in different stations of the test stand
  • Reasons for this increase are currently under investigation

Assignment algorythm software:

  • Matthias stressed that the sorting software from Bonn that assigns crystals to photo tubes and preamps should by made accessible to the collaboration by putting it to the PANDA GitLab
  • As soon as we have detailed preamp gain data the assignment has to be redone
  • There should also be the possibility to consider ready crystal-VPTT-preamp units (the ones already built) in the process

Irradiation of THMP and Light Pulser Units:

  • Myroslav sent back the irradiated parts and they obviously still work as proper as at the end of the irradiation beam time
  • Further studies on any deterioration of components go on

APD Irradiation:

  • Giessen expects new APD grids from PSL/GSI for irradiation this week
  • Andreas demand for strip chart monitoring of the APD dark currents not understandable against the background of agreement on irradiation of APDs with no bias supplied to
-- ThomasHeld - 28 Aug 2017
Topic revision: r2 - 29 Aug 2017, WernerErni
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding PANDA Wiki? Send feedback
Imprint (in German)
Privacy Policy (in German)