Molr A delegation framework for accelerator commissioning - - PowerPoint PPT Presentation

Molr

A delegation framework for accelerator commissioning

Nachiappan Valliappan Supervised by Marc-Antoine Galilee Jean-Christophe Garnier

Overview

Context

AccTesting orchestrates the commissioning of CERN’s accelerators and it’s equipment systems, which involves running tests provided by various commissioning tools + analyzing their outcome

Problem

AccTesting supports

• nly a specific set of

commissioning tools

Objective

To widen the spectrum

• f commissioning tools

supported by AccTesting

The problem

Statement

Develop a unified framework for integrating new commissioning tools with AccTesting

Requirements

• Reuse legacy code
• Location transparency
• Control & clarity

Commissioning activities

Collimator commissioning BIS LHC Magnet commissioning

AccTesting

• User defined commissioning tests
• Schedules tests considering multiple constraints
• Provides UI to monitor test execution + analysis

AccTesting

AccTesting + Molr

Molr

Challenges

API

Simple, but generic Should be easy to integrate and deploy tests provided by various existing commissioning tools

Control, I/O

Remote, but local-like

• Provide input
• Retrieve results
• Control execution
• Error propagation

Scaling

Load distribution Tens of 1000s of tests are run during a typical commissioning period (typically after longer stops of an accelerator)

Solution?

Hire a summie!

Credits: Lillian Huang, CERN summie

Molr Architecture

Icons made by Freepik & Madebyoliver from www.flaticon.com

Implementation ?

Image credits: parmodarora.com, kubernetes.io, wikipedia.org

Communication layer Infrastructure layer

Molr used by commissioning tools

Molr used by AccTesting

What did I do this summer?

• Helped design interfaces & overall architecture
• Investigated tooling options for infrastructure layer
• Implemented the communication layer
• Ate tons of pain au chocolat

Highlights

• Built using mathematically sound programming techniques (Monads!)
• Exploits the Java type system (generics) to provide run time guarantees
• Uses functional programming ideas borrowed from Haskell
• Molr is open source! https://github.com/molr

Next steps?

Validation and Integration of first commissioning steps via Molr for upcoming commissioning campaign at the end of next Year End Technical Stop (YETS)

Conclusions on Molr

• Furthers the goal of AccTesting by providing required degree of flexibility

and interaction with executed tests

• Allows to increase the coherency of commissioning campaigns, and

therefore overall dependability of the protection systems at time of machine-restart