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CFEB Crosstalk calibration Run 126158 (01/30/2010) Failed for most of the chambers

CFEB Crosstalk calibration Run 126158 (01/30/2010) Failed for most of the chambers. Failed in sub-test “Pulse Peak Position in Time” Pulse Peak position is shifted by ~25ns Didn’t observe it in December before shutdown. January. December.

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CFEB Crosstalk calibration Run 126158 (01/30/2010) Failed for most of the chambers

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  1. CFEB Crosstalk calibration • Run 126158 (01/30/2010) • Failed for most of the chambers

  2. Failed in sub-test “Pulse Peak Position in Time” • Pulse Peak position is shifted by ~25ns • Didn’t observe it in December before shutdown January December

  3. Strange crosstalk signal shape and signal line shape January Bad January Bad December Good December Good

  4. Need comments from CFEB Calibration DAQ Experts • Was it temporary DAQ glitch? (need to take another run to check) • Was pulsing procedure changed recently? • Why not all chambers are affected and some of them still show good signal shapes? • Should we change analysis to accommodate those changes?

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