1. elComandante
An ELaborate Computer Operated Modular Accessible Nested Data Aggregation Network Testing Environment

2. Software for Module Qualification with a Cooling Box
Felix Bachmair, Mauro Donega, Philipp Eller, Marco Rossini, Andrey Starodoumov, Rainer Wallny
August 28, 2012
Module qualification software - F. Bachmair

3. Module qualification software - F. Bachmair
Outline
Qualification of Modules
Different groups of tests
Test Environment
Testing Procedure
Old qualification Software: supervisor
Approach for new Software: elComandante
Details and status
Outlook
August 28, 2012
Module qualification software - F. Bachmair

4. Qualification of pixel modules
Every fully assembled pixel module must be tested and qualified.
Three groups of tests:
functionality tests, which checks the correct hardware functionality,
performance tests
Calibration algorithms to extract necessary calibration constants for the successful operation of the modules
August 28, 2012
Module qualification software - F. Bachmair

5. Module qualification software - F. Bachmair
Functionality tests
Validate TBM readout
Check programmability of all ROCs
pixel readout test
trim bits test:
check readout of hits in all pixels
Checks if threshold of each pixel can be tuned with the help of the trim bits
Trim bit picture
August 28, 2012
Module qualification software - F. Bachmair

6. Calibration and performance tests
Calibration tests:
Extract conversion factors:
PH vs. Vcal
ADC -> Temperature (still needed?)
Trimming of Chips to a certain threshold
Performance tests:
Sensor leakage current
Pixel noise
bump bonding test: validation of the connections between sensor pixels and ROC tr
August 28, 2012
Module qualification software - F. Bachmair

7. Module qualification software - F. Bachmair
Test environment
Test should be performed at different temperatures (+17ºC, -20ºC) to interpolate to the CMS operating temperature
Modules should survive temperature cycles (thermal stress)
Temperature and humidity must be regulated to avoid condensation
August 28, 2012
Module qualification software - F. Bachmair

8. Module qualification software - F. Bachmair
Testing procedure
Controlling the fulltest in the cooling box
Cooling box:
Temperature controlling
Control of humidity
Keithley:
IV curves
Supply different voltages
Psi46expert
Do different test procedures
Analyze data Qualify module
Send results to database
notification when problem occurs
August 28, 2012
Module qualification software - F. Bachmair

9. Old software: supervisor
Solution worked good at the setup at PSI
All modules of last production are tested with that software
Problem:
Software is hard to export to other machines
August 28, 2012
Module qualification software - F. Bachmair

10. Approach of ETH group: elComandante
There will be different production centers with different implementations of coolingbox etc.
Development of a software framework which supplies all functions of the old supervisor
Goals:
Platform (OS/PC, etc.) independent
Easy to adjust for a certain test environment
August 28, 2012
Module qualification software - F. Bachmair

11. elComandante: main ideas
Keithley
Cooling box
Test boards
psi46Client
Results/sta tus of tests
Voltage and current
Temperature and humidity
CoolingBox Client
Client
every hardware tool is controlled by an individual software client
The communication between this software clients is made by network messages
Server/Client structure based on a subscription model (libsubsystem)
Advantage:
Easy to substitute one client(e.g. control of coolingbox)
A client crash will not crash the whole test
Easy to expand software with more clients(e.g. temp sensors, etc.)
Temperature Client
Temp
Sensor
Easy to extend: new temperature sensors on picture on the right
August 28, 2012
Module qualification software - F. Bachmair

12. Status of development I
KeithleyClient:
Based on python
IV curves and automatic voltage/current monitoring during tests
Cooling Box Client:
Dry/cool/heat-routine can be adjusted for any temperature
Automatic stop at high humidity(interlock)
Automatic cycling
New: +20 / -20 degC
 12.5 min
Old: +17 / -10 degC
 10 min
August 28, 2012
Module qualification software - F. Bachmair

13. Status of Development II
PSI46 Client
An interface to steer psi46expert via “subsytem” is working
Tests have been performed
Can control many test boards in parallel
August 28, 2012
Module qualification software - F. Bachmair

14. Module qualification software - F. Bachmair
Status of development III
Control of all clients via elComandante
Starting all clients and performing test
Easy to configure via 2 configuration files
[Directories]
TestDefinitions: /home/user/testDef
WorkDir: /home/user/workDir
moduleDB: /home/user/moduleDB
defaultParameters: /home/user/defPar/
[TestboardAddress]
TB0: DPE00JA9
TB1: DPE00T0D
TB2: DPE00IUD
TB3: DPE00J4X
[subsystem]
Ziel:
Port: 12333
[Modules]
TB0: M0000
TB1: M0001
TB2: M3476
TB3: M7676
[ModuleType]
TB0: Roc
TB1: Roc
TB2: Full
TB3: Roc
[Tests]
Test:
August 28, 2012
Module qualification software - F. Bachmair

15. Duration of a Full module qualification
10 cycles = 2 hours
Old cycling ~ 1.5h
complete qualification process of a module will last 6 -7 h
August 28, 2012
Module qualification software - F. Bachmair

16. Next steps/ toDo/ possible extensions
Analysis: We started to implement the automatic analysis routines
DataBaseUpload -> to be defined
How should the upload look like?
How will the new data base look like?
A GUI would be a nice addon which can be added pretty easily
August 28, 2012
Module qualification software - F. Bachmair

17. For more information join the E-group:
Summary
New software is much more flexible
With the current version of the software we are able to make a Fulltest with a ROC
Error handling is still in progress
Everyone is welcome to use this tool for module testing
If you are interested, you can get the software via cern svn
We started a Twiki Page to document the software framework Still under development
Help us to improve the software frame to make it to a common tool for all test center!
For more information join the E-group:
August 28, 2012
Module qualification software - F. Bachmair