Scan Status Overview

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• ToT problem understood and fixed

• Vcal needs to be set at scan initialization

• Was always set to zero in STcontrol

• No loop over charge in STcontrol

• implemented electrons-to-DAC functions for comparison with TurbDAQ

• Most scans yield reasonable results in STcontrol now

• STcontrol can now configure the channel to module input is connected to from configuration file

Timewalk Scans

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• Basic configuration

• One level 1 trigger

• Loop over strobe delay 0-63 on RCE and

• Vcal 70 -1000 on host (steered by STcontrol)

• VCAL is 10 bit value (0-1023)

• Misrepresented as char/octet in PixelModuleConfig.idl

• fixed to unsigned long (32bit)

STcontrol Status Non-BOC-Scans

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SCAN HISTO TYPE Runs/Results COMMENTANALOG_TEST OCCUPANCY YES/YES ToT fixed now

DIGITAL_TEST OCCUPANCY YES/YES Works

CROSSTALK_SCAN THRESHOLD YES/NO Needs more debugging. No hits

TOT_CALIB TOT YES/YES Works. See plots

THRESHOLD_SCAN THRESHOLD YES/YES Works.

TIMEWALK_MEASURE OCCUPANCY YES/NO

TDAC_TUNE THRESHOLD YES/(YES) Works in principle. See plot. Some problems with half the FECs

T0_SCAN OCCUPANCY YES/NO No hits.

INTIME_THRESHOLD_SCAN THRESHOLD YES/NO No hits.

INCREMENTAL_TDAC_SCAN THRESHOLD NO/NO STcontrol error

IF_TUNE TOT YES/YES

GDAC_TUNE THRESHOLD YES/YES Works. See plots.

FDAC_TUNE TOT YES/YES Works. See plots

Scan Setup

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• Tested with module M511958 with HV connected

• one FEC broken

• threshold tuned to 3200 electrons with TurboDAQ

• ToT tuned to 30 cycles at 20000 electrons

• Framework with STcontrol now in place

• probably still some more bug

• would be good to check the result with the scan experts

CORBA Problems

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• Histograms are published to histogram server

• takes several minutes if all histograms are sent

• rate in the order of ten per second

• 101 bins x (3x ToT + 3 BCID + OCC) = 707 histograms

• Alternative (faster) method: download from RCE

• CORBA crashes (timeout?) when more then a certain amount (bins>50) of histograms present

• For now workaround in STcontrol

• download one-bye-one

• reasonably fast

TurboDAQ/STcontrol GDAC Tune

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TurboDAQ/STcontrol FDAC Tune

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GDAC FDAC Tune

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IF Tune

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Analog Scan ToT=30 @ 2000 e-

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ToT vs charge calibration

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