P Fonte  Trasgo 2010
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P Fonte Trasgo 2010

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    P Fonte  Trasgo 2010 P Fonte Trasgo 2010 Presentation Transcript

    • Sealed RPCs: The LIP approach P.Fonte LIP- Coimbra
    • Objective: Develop a large area sealed RPC detector that may be used for cosmic ray experiments and Outreach activities. Inexpensive Modular (easy maintenance) TOF-quality timing 1st prototype built in August 2009 Learning process ongoing…
    • Mechanics 100.00 4 mm acrylic 5 2mm glass m 10.00 m 4 mm acrylic External (independent) readout electrodes K7 approach
    • 1st prototype 1m2 Under test since August
    • Performance so far (example) 600 1025 Pressure (mbar), Temperature (a.u.) 500 1020 400 Corrente (nA) 1015 300 Background current 1010 200 Counting current Temperature pressure 1005 100 0 1000 12-01-10 14-01-10 16-01-10 18-01-10 20-01-10 22-01-10 24-01-10 26-01-10 28-01-10 30-01-10 Chamber sealed Date The contamination is internal. We made VERY sure there is no macroscopic leakage. Best guess (my version): air trapped in adesives and/or under foils. If so, should go away after a few cleaning cycles. Obvious alternative: outgassing from materials.