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Scoping study for a future accelerator neutrino complex

Scoping study for a future accelerator neutrino complex Blackett Laboratory - Imperial College - London Discussion meeting 6-7 May 2005 Photo-detectors R&D for Megaton-scale Detectors L. Mosca CEA-Saclay. Envisaged Megaton-scale detectors : Water Cherenkov LiAr TPC Liquid scintillators

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Scoping study for a future accelerator neutrino complex

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  1. Scoping study for a future accelerator neutrino complex Blackett Laboratory - Imperial College - London Discussion meeting 6-7 May 2005 Photo-detectors R&D for Megaton-scale Detectors L. Mosca CEA-Saclay

  2. Envisaged Megaton-scale detectors: Water Cherenkov LiAr TPC Liquid scintillators …………

  3. Tunnel actuel Futur Tunnel de Service Laboratoire actuel • Futur Laboratoire

  4. Photo-detectors R&D for Megaton-scale Detectors (Water Cherenkov, LiAr TPC, Liquid scintillator, …) A) Vacuum photo-tubes : - “standard” (with dynodes) PMTs - “hybrid” (with PIN or APD diodes) HPD - “wall-papers” (Ferenc) B) Gaseous photo-tubes, “wall-papers” shaped : - with CsI photo-cathode (ultra-violet region) - with bi-alcali photo-cathode (visible region)

  5. Bulb shape photodetectors Photocathode Photocathode Photocathode Photocathode Scint PIN APD PMT Electronics Electronics PMT HPMT HPD HAPD Very good SER and TTS (depend of FEE) HV (negative) 10 kV or more Very good SER TTS ? (depend of FEE) HV (negative) 15 to 30 kV Medium SER and TTS (depend of size) HV 2 or 3 kV Good SER and TTS (depend of scint) HV 20 to 30 kV Joël Pouthas IPN Orsay

  6. PMT HPMT HPD HAPD Photocathode Photocathode Photocathode Photocathode Scint PIN APD PMT Bulb shape photodetectors Companies ETL PHOTONIS + Labs (Characterization) R&D HPD CERN R&D PHOTONIS DEP R&D Hamamatsu and Tokyo Univ. Quasar (Russia) R&D VLVvT R&D PHOTONIS (+ IPNO) Joël Pouthas IPN Orsay

  7. 13 inch HAPD prototype (HV = 12 kV) Hamamatsu+Tokyo Univ.

  8. “WALL PAPERS” (FLAT PANELS) with VACUUM Detectors (Ferenc)

  9. “WALL PAPERS” (FLAT PANELS) with GASEOUS Detectors (MICROMEGAS)

  10. Drift electrode Conversion/drift (1kV/cm) (3mm) Amplification (40 kV/cm) micromesh (100 m) strips insulator

  11. MICROMEGAS PHOTODETECTOR • Photon feed back suppressed • Negligible Ionization • Excellent single electron response

  12. Other people/laboratories also potentially interested in this development : Fanourakis gfan@mail.demokritos.gr Busto busto@cppm.in2p3.fr Alexander S.Murphy amurphy@ph.ed.ac.uk Smith.N n.j.t.smith@rl.ac.uk Spooner n.spooner@sheffield.ac. uk Vavra <jjv@slac.stanford.edu>

  13. Conclusion/Outlook To go from a I3-Neutrino scheme to a Design Study proposal, we need to be more ambitious and try to fulfil all the “objectives”, including the detection in the visible range and the optimisation of the prototypes in view of a very massive production.

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