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D. Attié, P. Colas, M. Lupberger, M. Riallot

News from “ Octopuce ”. D. Attié, P. Colas, M. Lupberger, M. Riallot. LCTPC WP Phone meeting 109 July 15, 2010. News data at higher gain. Gas: ArIso (95:5) V Ingrids = 290 V ! (275 V before) Gain ~550 Stable conditions (no spark) except hot spots (~8 nA) No trigger on cosmics

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D. Attié, P. Colas, M. Lupberger, M. Riallot

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  1. News from “Octopuce” D. Attié, P. Colas, M. Lupberger, M. Riallot LCTPC WP Phone meeting 109 July 15, 2010

  2. News data at higher gain • Gas: ArIso (95:5) • VIngrids = 290 V ! (275 V before) • Gain ~550 • Stable conditions (no spark) except hot spots (~8 nA) • No trigger on cosmics • Acquisition time: 0.5 s • Efficiency to single e- 25 % LCTPC WP phone meeting #109

  3. Weak points • VIngrids = 290V up to 300 V • Unstable conditions LCTPC WP phone meeting #109

  4. Beam test in Large Prototype ? • Are we ready to go to DESY? • Any idea how to fix the weak spots? • First, we can make a long run at VIngrids = 290V in Saclay to check the stability and robustness • We could have a dedicated beam test of three days in October LCTPC WP phone meeting #109

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