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A Look At The Noise From HBD west

A Look At The Noise From HBD west. Jason for the SB Tent Crew. Sept 12, 2006. the noise is very gaussian, no long tails!. monitoring 16 ch. (48 read out in data). sigma ~1.5, similar for all live channels. non-pulsed channels. live channels. prototype. Noise from HBD west.

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A Look At The Noise From HBD west

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  1. A Look At The Noise From HBD west Jason for the SB Tent Crew Sept 12, 2006

  2. the noise is very gaussian, no long tails! • monitoring 16 ch. (48 read out in data). • sigma ~1.5, similar for all live channels. non-pulsed channels live channels prototype Noise from HBD west • Chi came and set up his electronics • running a pulser through the preamps. signal ~17 ns slices sample #

  3. Noise [(S8+S9+S10)/3 - S0 ] Prototype in the hall (courtesy of Itzhak, 8-1-06) Pedestal file 203948 Noise of a single channel Probability to fire on noise for A>nσ Sigma as a function of Pad no. 2σ 3σ 4σ 5σ 6σ

  4. Noise [(S8+S9+S10)/3 – S0] noise from a single channel

  5. Noise Analysis (S4+S5+S6)/3 – (S1+S2+S3)/3 (S8+S9+S10)/3 – (S1+S2+S3)/3 (S13+S14+S15)/3 – (S1+S2+S3)/3 [(S8+S9+S10)/3 – S0 noise from a single channel σ vs channel <y>=1.22 ± 0.05 <y>=1.48 ± 0.06 <y>=1.52 ± 0.05 <y>=1.65 ± 0.06 Prob. to fire on noise vs channel

  6. Noise Analysis some other channels (S4+S5+S6)/3 – (S1+S2+S3)/3 (S8+S9+S10)/3 – (S1+S2+S3)/3 (S13+S14+S15)/3 – (S1+S2+S3)/3 [(S8+S9+S10)/3 – S0

  7. Conclusions • non-Gaussian tails of the noise distribution are gone. • Probability to fire on the noise: • <1% at 3σ • <5% at 2σ • There is some (tiny, but non-zero) lower-frequency noise also. • All noise of HBD west on the bench is tiny compared to the prototype in the hall. • We’re ready and waiting for the data to start coming out of the hall.

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