Run2b Silicon Electronics

Gustavo Otero Y Garzon

University of Illinois at Chicago

December 9, 2002

Spreadsheet Status

Laser measurements

L1 module measurementsPedestal distributions

Correlation between chips

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Spreadsheet

“SVX4_MS_1.9.xls” can be found in d0server4\

users\gotero\spreadsheets\good_spreadsheets\

Not entirely documented yet. The

documentation of the previous version is in:

d0server4\projects\run2b\silicon\www\smt2b\testing\

testing\html

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Spreadsheet’s New Features

Flag for “new” and “old” SASeqsDMC_1300 control (laser table movement)HV motherboards controlPedestal distribution plotsCorrelation plotsExport plots as GIF filesMaster/Slave mode (simultaneous readout

of up to 6 chains)

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What’s Coming…

Automatic scan of strip’s response to laser signal

Depletion voltage measurements Leakage current measurementsDMA

(Done this week?)

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L1 Laser Measurements

Used SASeq’s trigger mode, RTPS and read from pipeline cell #4 to see the laser signal (in 132ns mode)

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L1 Module - Laser

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L1 Module - Laser (2)

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L1 Module (Data Mode)

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L1 Module (trig. Mode)

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L1-correlation (Data Mode)

RTPS on

RTPS off

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L1-correlation (Trig- Mode)

RTPS on

RTPS off

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L1-pedestals (Data Mode)

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L1-pedestals (Trig Mode)

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Conclusions

Need to reduce total noise (grounding issue) Laser

Signal seen by run2b silicon detectors Possible to measure Depletion V. and Leakage C.

Pedestals of L1 module Trigger mode (no difference seen from 0V to 20V)

RTPS turn huge fluctuations to be decent Data mode

RTPS on + 20V and RTPS off + no bias looks ok RTPS off + no bias and RTPS on +20V looks bad

Correlation Pedestal fluctuations of bonded chips are totally correlated

It reduces substantially with RPTS No mayor changes with bias (20V)