1. Visit to CALICE ECAL testbeam (by Shinshu) at DESY, 16 th – 19 th October 2012 Samir Arfaoui & Erik van der Kraaij 30 th October 2012

2. Setup @ DESY 30th October 2012Erik van der Kraaij, CERN LCD 2 Scintllators: 45x5x2mm strips are used by the japanese they recycled them from a previous prototype tile and had the strips cut from it no clear supplier for their scintillators Read-out: Hammamatsu MPPC (model?) Their layer has 144 tiles (36x4) with 4 HBU and 4 SPIROC2b chips. On top, 3 cards: –DIF (LEMO for Spill signal, TTL signal, and Reset) –Calibration board (LED) –Data-out board with USB connector

3. Setup @ DESY 30th October 2012Erik van der Kraaij, CERN LCD 3 Trigger Self-trigger: when one tile has a hit over threshold, all the tiles on the same HBU (36 total) are read out. Validation mode: a crossed scintillator pair in coincidence for external trigger, upstream of the prototype. If validation signal is sent within clock-cycle of self-trigger, data is flagged as validated –Helpful to get rid of noise self-triggers –Japanese team did not manage to operate in this mode Front-end: SPIROC2b Seems to be a black box… Memory: 16 events and 0.5-1s for read-out Complex configuration (Labview programs by DESY people)  not a good idea for early CERN lab setup… Need expertise (LAL? DESY?) for initial setup/operation –Japanese team lacked it, slowed them down greatly

4. Setup @ DESY 30th October 2012Erik van der Kraaij, CERN LCD 4 Came in this morning from Katsu They managed to perform measurements at various positions in the shower

5. Setup @ CERN 30th October 2012Erik van der Kraaij, CERN LCD 5 Need for CERN lab: at least 3 scintillators: 2 for coincidence trigger to get rid of the noise and the one under test collimated radioactive source SiPM + decoupling circuit => Picoscope Hamamatsu MPPCs from DESY (thank you) –10 of them in Samir’s office (+ a couple of reflective foil sheets) Black box with cooling (or at last temperature monitoring) and shielding Readout options (from Christian) EasiRoc. High level of integration. 128+ channels. ADC, no TDC. Could be made available by Aachen. SPIROC + testboard at OMEGA. Details still to clarify. CAEN VME module (similar to Erika @ DESY). PreAmp, ADC, TDC. How to bias MPPCs? CERN pool? Picoscope. 4 channels. Bias via Keithley. CERN pool?

6. More pictures on the strips 30th October 2012Erik van der Kraaij, CERN LCD 6

7. TeraScale Alliance testbox For single channel 30th October 2012Erik van der Kraaij, CERN LCD 7

8. Decoupling Multi-channel board 30th October 2012Erik van der Kraaij, CERN LCD 8

9. Readout by VME Instead of picoscopes 30th October 2012Erik van der Kraaij, CERN LCD 9

10. Readout by VME … 30th October 2012Erik van der Kraaij, CERN LCD 10