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List of materials for Forward Endcap RPCs

List of materials for Forward Endcap RPCs. D. Piccolo INFN Napoli. 18 (layers) x 3 (chambers) x 2 (doors) = 108 chambers = 216 modules (432 in all bigaps solution) Different shapes top chambers : 3 + 12 + 1 + 1 + 1; middle chambers : 18 different shapes;

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List of materials for Forward Endcap RPCs

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  1. List of materials for Forward Endcap RPCs D. Piccolo INFN Napoli Pisa meeting january 18-20 2001

  2. 18 (layers) x 3 (chambers) x 2 (doors) = 108chambers = 216 modules(432 in all bigaps solution) Different shapes top chambers: 3 + 12 + 1 + 1 + 1; middle chambers: 18 different shapes; bottom chambers: 15 + 1 + 1 + 1; Number of horizontal strips: 32/module Number of vertical strips (top and bottom chambers): 64/chamber; Number of vertical strips (middle chambers): 55 to 80 per chamber according to layer number Chambers and strips numerology Horizontal strips Top chambers module Middle chambers vertical strips Bottom chambers Pisa meeting january 18-20 2001

  3. List of materials • Bakelite • carbon coating • PVC films • polycarbonate spacers • frame (polycarbonate/G10) • gas tubes and inlets • strips and cables from strips • foam • HV connection Pisa meeting january 18-20 2001

  4. Bakelite Celfen 2 produced by PanPla Italy maximum size: 1.6 x 3.2 m^2 thickness: 2.00 +- 0.17 mm Resistivity range used for BaBar: 1-6 10^11 ohm cm Graphite paint DAG 305 solved in MIBK produced by Akeson, about 100 k / Insulating film polyetilenterephtalate (mylar): DIEPOL produced by Effegidi S.p.A. thickness: 190 um Pisa meeting january 18-20 2001

  5. Spacers polycarbonate thickness: 2.000+-0.015 mm edge frame G10 (for Babar RPCs) polycarbonate (for last 24 RPCs installed inside forward endcap) Gas tubes teflon tube (4 mm inner diameter, 6 mm outer diameter to 1/4 inch on bubbler) gas inlet polycarbonate 1 cm 2 mm 7 mm Hot melt G10 edge frame Gas out Gas in Pisa meeting january 18-20 2001

  6. Strips 190 m mylar + 18 m copper (strips side) 50 m mylar + 18 m copper (gnd side) 2 K resistor between strip and ground. Cable from strips to FEC 34 wires twisted flat cables between 4 and 6 mt length for each 16 strips Foam styrofoam produced by Dow Chemical Company thickness: 4 mm for old RPCs, 3 mm for new RPCs strip pitch vertical strips: 3.8 cm horizontal strips: 2.8 cm inter-strip distance: 2 mm Ground wire Pisa meeting january 18-20 2001

  7. HV connection conductive epoxy tinned copper sticker mylar protection cable: 22 gauge tinned copper, pvc jacket. Produced by Belden Pisa meeting january 18-20 2001

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