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Noise Analysis and Monitoring for HBD West Electronics

Detailed analysis of noise levels in HBD West electronics. Gaussian noise distribution, low probability of noise firing. Non-pulsed and live channels monitored. Noise levels compared to prototype.

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Noise Analysis and Monitoring for HBD West Electronics

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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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