Update on Cold Electronics Test Stand Interfaces 20170109- Cold - - PowerPoint PPT Presentation

Update on Cold Electronics Test Stand Interfaces

20170109- Cold Electronics Meeting - B. Kirby

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Overview

• Reminder: UDP-based readout for cold electronic test stands and upcoming

production electronic tests

• Recent progress
• Upcoming work

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UDP-Based Cold Electronic Interface

• J. Fried (BNL) implemented a very simple UDP-based interface that allows

direct ethernet connection between cold electronic boards (FPGA board, WIB) and readout PC (or switch)

• Jack has posted his readout firmware + LabView interface here:

http://www.inst.bnl.gov/~jfried/LIQ_ARG/DUNE_SBND_FILES.htm

PC FEMB

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UDP

Updated Cold Electronics UDP Interface Software

• Simple python modules implemented for use with FEMB UDP interface

○ https://github.com/DUNE/femb_python

• Intended to simplify working with FEMB test stands

○ Provide a version controlled + stable readout ○ Physicists can define their own tests easily with python scripts ○ Automate board initialization, data-taking and analysis ○ Very easy to integrate signal generator / power supply control into test scripts ○ Generic interface to testing database

• Plan to use python-based readout to automate cold electronic production

testing and documentation of results via database

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Recent Progress

• Significant improvements to basic python package since last update

○

• J. Hugon revised directory structure, committed code to official DUNE git repostiory,

implemented a pip install script ○ Fully migrated to python3 ○ Implemented basic readout modules for 35t + SBND FEMBs, ADC ASIC chip tester and SBND + WIB

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WIB Test Stand: Automated Gain and ENC Measurements

• As part of WIB + SBND integration tests, implemented a fully automated

channel gain and ENC measurement:

https://github.com/DUNE/femb_python/blob/master/femb_python/test_measurements/wibTestStand/doFembTest_gainMeasurement.py

• Automated measurement steps:

○ Check Test Stand: ■ Checks state of readout, bench supplies, executables and database interface ■ Initialize board to known “default” state ○ Perform Test: ■ Configure ASIC channels and record multiple “subruns” with different pulser signal sizes ○ Analyze data: ■ Analyze from multiple subruns to measure gain and noise for each channel ■ Produce and display a standard summary plot

• Measurement takes O(5 minutes) (including analysis) and produces ~10MB

○ Data-taking environment, output files and results automatically documented

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WIB Test Stand: Automated Gain and ENC Measurement Plot

Pedestal Mean vs Channel # Gain Vs Channel # ENC Vs Channel # Overall Gain Distribution Overall ENC Distribution FFT Vs Channel #

Database Interface

• Previously presented a version of the automated measurement package that

included a simple database interface based on SQLalchemy and sqllite

○ Feedback suggested this was unnecessarily restrictitve, would be better to define a “generic” database interface

• Current model: each test (or run) produces a standard JSON file summarizing

the details of the test, output files and results

• This JSON file can then be used to update the database using different

frameworks

○ Not committed yet, sorry! ○ For upcoming production electronic tests at BNL we still expect to use SQLalchemy + local SQL server

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Upcoming Work

• Need to finalize measurement projects for dedicated ASIC test boards, WIB

testing in anticipation of upcoming production tests

• Revise GUI: currently using GTK library, very simple but some users have

had a lot of trouble with installation. Need to make this easier.

• Start “practicing” production testing, shake out bugs in process.
• Documentation: must document each production test stand in detail, the

automated measurement method and associated analysis

○ Documentation should go here: https://github.com/DUNE/femb_doc

• Set up production testing database servers (already discussed)
• Online monitor: need a package to parse production testing database and

produce summary plots, provide complete testing records, monitor overall testing progress etc

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Backup

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