1. Me, FESA classes, Testing
SM18
Me, FESA classes, Testing
Input from…
Most of RF/CS and RF/SRF, O. Andreassen, P. Fernandez, D. Valuch, P. Baudrengheim, Bruno Dremel, Andrey Pashin, CO

2. Prior work with BE/CO
Background in Computing and Informatics, software development
Alarm systems (databases, servers, front-ends, equipment, fire, safety)
CO’s “message-oriented middleware” expert
Software development, maintenance, debugging, finding failures
Moved towards testing (SAQ certified SW tester), SW quality, development processes, (eg trained Scrum master, Kanban), ran CO Testbed
Managed CO’s SW configuration management
project team tools (issue tracking, wiki, code review + inspection)
automated build+test servers, build tools
After 15 years -> time for a change
“Phased out” – provide occasional help to CO
04/10/2016
Niall Stapley

3. CO Testbed / Build + Test Service
cern.japc.ParameterException: LHCTM.cfv-864-cttblhcgw (CMW) is down or unreachable
java.lang.AssertionError: errors found: [cern.japc.ParameterException]
04/10/2016
Niall Stapley

4. Test Engineering
Not taught, no degree in (SW) testing, learned in industry
Always limited by resources
Testing disproves that a system can work
Automation, tools and procedures; to help reproduce failures
Why? Often need to run tests repetitively
Hardware + Software together is systemically harder to test.
Some examples…
Ariane 5, Airbus Paris Airshow crash, Therac-25
04/10/2016
Niall Stapley

5. Death by software – Therac-25
Radiation therapy gone wrong…
No code review
Testing together with HW deemed hard
No HW based protection for patient
04/10/2016
Niall Stapley

6. How to work in SRF – part 1 Retrain, update skill set, learn lots…
FESA
C/C++
Python
RF and related accelerator concepts
Inspector
LabVIEW
CALS/Timber
Controls Hardware (FECs, VME, modules, cards, timing)
Make new friends
Test new skills and friends with simple projects*
*It wasn’t that simple.
04/10/2016
Niall Stapley

7. How to work in SRF - part 2
Find out “what people think you supposed to do”™
Find and learn from the people involved in “what people think you are supposed to do”™
Understand enough of what you don’t know
Apply what you now know
Understand “what people think you supposed to do”™
Do work towards “what people think you supposed to do”™
Goto 1, 2, or 3 as appropriate until done
04/10/2016
Niall Stapley

8. Many patient “back of an envelope” explanations
Many RF members kindly
take time to help and explain
04/10/2016
Niall Stapley

9. Generic Vertical Test stand “Test Framework”
Goal: long term generic SM18 Test Framework
Last 10 years +
So must evolve: adaptable, upgradable
Some potential technology choices to be made (analysis)
To be based on tools and infrastructure existing at CERN (for long term maintanence)
“V3” FESA2 SPLV3App is obsolete, to be replaced by…
Generic FESA class set (as above)
Alternative signal sources (eg. where V3 retrieves them)
Possible to integerate into LabView directly
Aggregator
CMW/FESA proxy device
Generic publisher
04/10/2016
Niall Stapley

10. Generic Vertical Test stand “Test Framework”
“Toy Inspector” Environment Monitor
to demonstrate basic capabilities
Magic Carpet
Requirements discussed -> initial specification and direction
HIE-Isolde testing system
“HIE-Isolde LLRF with all associated FESA classes and testing facilities; including sequencing, high level test applications can be used with minor modifications in SM18 HiQ tests” - Daniel Valuch
Based on CO tools and infrastructure (FESA classes, TIMBER, …)
Well worth an analysis of capabilities against our needs
Potential reuse and RF/CS obliged to maintain
04/10/2016
Niall Stapley

11. SM18 LLRF Crab Cavity testing for SPS
In contact with P. Baudrengheim
To work with Bruno Dremel
FESA classes for
Obj.1 VME crate without cavity loop Tuner used for acquisition
class based on one from LN4
“end October”
Obj.2 VME Crate with Tuner in operation and sample cavity loop
04/10/2016
Niall Stapley

12. SM18 Cryolab
LabVIEW
FESA classes
CALS/TIMBER
Analysis tools
Eg. Jupyter
Aim for same underlying software and use of CO tools as V’s
Using API: Generic Test Properties HW
04/10/2016
Niall Stapley