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

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 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. 2/ 6

Overview Guardian IFO manager node device node EPICS Top level manager nodes ITM ETM control lower level subordinates, down to PSL SEI SUS SEI SUS ISC device nodes that talks directly to the RTS front-ends and Beckhoff. realtime control fast control fast control fast control fast control fast control Beckho ff A single IFO manager sits at the top, accepting EtherCat PCIe IO state requests for the entire interferometer. physical plant 3/ 6

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. 4/ 6

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

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 6/ 6