Jameson Rollins LIGO/Virgo Joint Run Planning Committee 12/19/2013 - - PowerPoint PPT Presentation

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Jan 03, 2023 273 likes •346 views

aLIGO Guardian Synopsis and Status Update Jameson Rollins LIGO/Virgo Joint Run Planning Committee 12/19/2013 Overview Guardian is the aLIGO automation system. It will manage the state of the interferometers by coordinating state transitions

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aLIGO Guardian Synopsis and Status Update

Jameson Rollins

LIGO/Virgo Joint Run Planning Committee

12/19/2013

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Overview

Guardian is the aLIGO automation system. It will manage the state of the interferometers by coordinating state transitions of all interferometer subsystems. The primary tasks are: full interferometer lock acquisition and recovery from lock loss monitor interferometer state, recovering from undesirable deviations where possible and alerting operators otherwise aid commissioning Global automation is structured as a hierarchy of individual guardian processes (nodes), each handling control of a particular domain of the interferometer.

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Overview

Top level manager nodes control lower level subordinates, down to device nodes that talks directly to the RTS front-ends and Beckhoff. A single IFO manager sits at the top, accepting state requests for the entire interferometer.

Beckhoff

fast control

PSL SUS SEI ISC SEI physical plant IO realtime control Guardian

EtherCat PCIe

ETM

fast control fast control fast control fast control

EPICS

IFO

SUS ITM

manager node device node

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Overview

Nodes are programmed as state machines. Nodes accept state requests from above, and analyze their state graphs to determine how to reach the requested state. All interaction is done via EPICS, both between nodes and between the RTS and Beckhoff front ends: device nodes read and control states of front ends managers request and monitor state of their subordinates All request and status channels for all nodes will be recorded in frames.

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Status

Guardian infrastructure fully deployed at LHO. LHO input mode cleaner (IMC) under guardian control. This currently includes three guardian nodes: IFO_IMC: IMC manager ISC_IMC: ISC component of IMC control SUS_MC2: MC2 suspension (IMC actuator) with more to come...

IFO IMC SUS MC2 PSL ISI HAM3 HPI HAM3 IFO HAM3 ISI HAM2 HPI HAM2 IFO HAM2 SUS MC1 SUS MC3 ISC IMC IFO IMC SUS MC2 ISC IMC 5/ 6

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Ahead

add SUS MC1 and MC3 under LHO IMC manager deploy Guardian infrastructure and IMC control at LLO (January 2014) commission ISI and HPI guardians (in progress) top-level IFO manager and PRMI and DRMI locking integrate ALS (Beckhoff) full IFO locking

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