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F o C al h igh granularity R&D

F o C al h igh granularity R&D. E lena r occo N i khef – Utrecht university C ern – alice week, march 2014. CERN test beams 2014 with focal prototype ( low+HIGH layer granularity). We asked for 2 test beam periods: PS: 2 weeks at T9 (mixed beams: e-, π) in September;

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F o C al h igh granularity R&D

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  1. FoCalhighgranularityR&D Elenarocco Nikhef– Utrecht university Cern–alice week, march 2014

  2. CERN test beams 2014 with focal prototype (low+HIGH layer granularity) • We asked for 2 test beam periods: • PS: 2 weeks at T9 (mixed beams: e-, π) in September; • SPS: 1 week at H6 (high energy electron beam; mixed beams) in December. • PS-SPS schedule (preliminary) • https://sps-schedule.web.cern.ch/sps-schedule/ E. Rocco - FoCal meeting- ALICE week CERN

  3. Focal presentation & publications 2014 • Incoming conferences (up to now): • Quark Matter: poster accepted • TIPP2014: accepted contribution (speaker: T. Chujo) • ICHEP 2014: contribution to be submitted (spekear E. Rocco) • …. • Past conferences: • - ICTR-PHE 2014: poster (authors: D. Aadnevik, E. Rocco)(proton therapy) E. Rocco - FoCal meeting- ALICE week CERN

  4. High granularity prototype E. Rocco - FoCal meeting- ALICE week CERN

  5. Utrecht current activities • 1.Data analysis and simulations ongoing on the previous data set (2012 PS &SPS data) -> problems on chips calibration • calibration using clustersize for pion tracks • charge diffusion implementation E. Rocco - FoCal meeting- ALICE week CERN

  6. Utrecht activities: simulation data ER= 6,2% ER= 5,2% A factor of 2 of difference E. Rocco - FoCal meeting- ALICE week CERN

  7. Utrecht activities: • 2. Continuously data taking with cosmic data: • - noise calibration (done!) • - noise time stability • - complementing the info of the prototype for different threshold settings to Cosmic data after“calibration” Cosmic data before “calibration” E. Rocco - FoCal meeting- ALICE week CERN

  8. Utrecht activities: Uniformity within the layer, missing channels E. Rocco - FoCal meeting- ALICE week CERN

  9. Utrecht activities: What about the cluster size for tracks? E. Rocco - FoCal meeting- ALICE week CERN

  10. Utrecht activities: Before alignment • 3. Alignment is important to properly estimate the shower shape (lateral) After alignment ~40 μm spatial resolution, but it is just first iteration E. Rocco - FoCal meeting- ALICE week CERN

  11. Test beam at DESY – February 2014 • Parasitic beam users, nevertheless in 1 week of data taking (mostly night shifts) we collected enough statistics for the following energies: • 2, 3, 4, 5(just few runs) and 5,4 GeV • At 2 GeV 3 different threshold settings (low, standard, high) • Participants: • Bergen group: S. Yang, D. Joshi, D. Aadnevik • Utrecht group: G-J Nooren , T. Van Brink, M. Reicher, C. Zhang, H. Wand, M. Dietze, M. Mohammadi, E. Rocco. E. Rocco - FoCal meeting- ALICE week CERN

  12. some shower examples at 5.4 GeV Front view E. Rocco - FoCal meeting- ALICE week CERN

  13. some shower examples at 5.4 GeV Side view E. Rocco - FoCal meeting- ALICE week CERN

  14. Hits distribution scan in energy E. Rocco - FoCal meeting- ALICE week CERN

  15. Longitudinal profile (2 vs 5.4 GeV) Layer 5 (missing channels) Still problems with missing channels/chips E. Rocco - FoCal meeting- ALICE week CERN

  16. Very close look to the shower E. Rocco - FoCal meeting- ALICE week CERN

  17. Conclusions • FoCal prototype willbe tested at CERN at PS and SPS. • Current activities on the digital prototype: • The digital prototype has been tested at DESY with new chip settings and preliminary results show improved performance (ongoing analysis). • Analyses of the previous data: ongoing • Chip software alignment procedure: ongoing • Simulations studies: ongoing • Future activity: • Test beam at CERN at the SPS • Presentation of the FoCal performance at several conferences E. Rocco - FoCal meeting- ALICE week CERN

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