LIGO Document T1000131-v5

Advanced LIGO System Guardian

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Document type:
T - Technical notes
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This note describes a scheme for controlling the Advanced LIGO interferometers with a modular hierarchy of guardian scripts. The scripts allow the user to interface with subsystems as independent state machines, including the ability to continuously verify the current state.
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Notes and Changes:
Updated figures to match presentation from ISC face2face
Cleaned up some text
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