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Status of the Calorimeter prototype

Status of the Calorimeter prototype. J.A. Scarpaci. Within the EXL/R3B colaboration 3 prototypes will be built (USC, LUND, IPNO) APDs or PMTs leading to different shapes. 12 CsI crystals. … CsI crystals. 18 CsI crystals. 4 cm. 1 cm. Status of the Calorimeter prototype. Rectangular

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Status of the Calorimeter prototype

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  1. Status of the Calorimeter prototype J.A. Scarpaci • Within the EXL/R3B colaboration • 3 prototypes will be built (USC, LUND, IPNO) • APDs or PMTs leading to different shapes 12 CsI crystals … CsI crystals 18 CsI crystals 4 cm 1 cm

  2. Status of the Calorimeter prototype Rectangular Crystals 1 cm 2 cm 110 Square PMT (1 per 2 crystals)

  3. Calorimeter Design of the Prototype 18 crystals [CsI(Tl)] with 9 square PMT Wooden box to hold the crystals Carbon foil

  4. Pictures of the prototype parts Double PMTs from Photonis CsI crystal from Amcrys CREMAT preamps and bases

  5. Cabling inputs/outputs 2 last dynodes (SMA) 2 charge signals (SMA) from CREMAT preamp 1 low bias 1 high voltage (fisher) Converter box : 9 fisher to 9 SHV 18x2 SMA to 18x2 BNC (2 m) 9 low bias to one

  6. Flunges are needed (9 SHV, 36 BNC, 1 low bias) High bias supplier (9 channels ~ 1000 Volts) Low bias (1 channel) ADCs for charge signals (18 channels) QDCs and gates for current signal (18 channels or 2x18 if PID) Acquisition

  7. Planning of the tests • October 2008 : reception of the 18 crystals and preamps plus bases • reception of the squares PMTs from Photonis - beginning of november • testing of the single detectors : CsI-PMT-Preamp • Decembre 2008-January 2009 : mounting of the prototype • February 2009 - …: source testings • and simulations with different • thicknesses of carbon foil in • between the crystals • prototype will be available for • beam testing starting march 2009

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