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Gas sTOF, or gastof

Luc Bonnet , Tomek Pierzcha ł a , Krzysztof Piotrzkowski , Pierre Rodeghiero Université Catholique de Louvain. Gas sTOF, or gastof. Status: prototypes tests Next steps and plans. Recent developments Received two fastest PMTs on the market:.

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Gas sTOF, or gastof

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  1. Luc Bonnet, Tomek Pierzchała, Krzysztof Piotrzkowski, Pierre Rodeghiero Université Catholique de Louvain Gas sTOF, or gastof Status: prototypes tests Next steps and plans

  2. Recent developments • Received two fastest PMTs on the market: They are very expensive, ~ 20k euro apiece… but within a small collaboration with HPK we received two such MCP-PMTs (with HPK amplifiers) for tests. FP420@Manchester, December'06

  3. Irradiation tests • Hamamatsu is interested in testing radiation hardness, so we will characterize PMTs before and after neutron irradiation at Louvain • First low irradiation done, next planned around January • For PMT we have started with low doses at 1011n/cm2 level, and will increase it – URGENTLY needs input from simulations on doses around pockets • We irradiated one mirror at 1014 n/cm2 FP420@Manchester, December'06

  4. Irradiation tests cont’d • PMT kept at HV during irradiation (< 1h), and coupled to Sci bars so rate monitored on-line • For precise characterization before/after irradiation need a dedicated setup  • We should use this opportunity to tests other components – we will irradiate UV mirrors, and measure their reflectivity before/after; what about Burle and quartz bars?? FP420@Manchester, December'06

  5. EIG1000D with PIL063SM (fiber coupler and fiber) • PiLas Digital Control Unit (EIG1000D) • Optical Heads (PILxxx) for 375 nm – 1550 nm) • Laser stand • Borrowed picosecond laser driver (PiLas) and bought UV laser head PIL040 - 408 nm, 32 ps pulse FWHM and < 3 ps jitter! Crucial also for design and development of electronics as amplifiers, CFDs and DAQ! Good for simulating LHC high event rates – runs up to 1 MHz repetition rate. FP420@Manchester, December'06

  6. FP420@Manchester, December'06

  7. Laser pulse is large (~108 photons)- needs strong attenuation and monitoring/calibration: • PIN photodiode • monitoring is • running: • Then assembled optical box allowing for setting intensity of photon pulse in large range, for example N = 0.1-1000 photons per pulse FP420@Manchester, December'06

  8. FP420@Manchester, December'06

  9. Before irradiation FP420@Manchester, December'06

  10. After No sign of degradation… FP420@Manchester, December'06

  11. Electronics: • First CFD prototype in production; started to design a NIM multi-channel board with possibility of remote control (directly from LabView using RS232) • Acquired new VERY fast (14 GHz BW) amplifiers from Mini-Circuits: FP420@Manchester, December'06

  12. At the moment we work on a modular system for Gastof: Single channel amplifiers (HPK/MC) + CFDs (4/8 channel NIM module) + TDC (??) Later go for integrated design? FP420@Manchester, December'06

  13. Next Fermilab tests: • Revamp two old Gastofs with 10 mm Burle tubes and new mirrors; will use also single anode readout – expect to reach ~ 40 ps resolution • Produce new two prototypes with Hamamatsu PMTs and spherical mirrors and reflective detector thin wall (pocket side) – expect < 20 ps resolution • High resolution DAQ – will contact SPC-134 system producers (< 5 ps resolution) to evaluate possible use for FP420 – consider for summer’07 FP420 tests… FP420@Manchester, December'06

  14. FP420@Manchester, December'06

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