LIGO Document T1800103-v1

Vertex to end station chamber positioning requirement

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T - Technical notes
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At a recent meeting at IUCAA regarding interfaces between the vacuum system and the civil construction, the following question was posed by the LIGO-India Chief Architect (Nagaraj):
What is the x and y tolerance on placement of the end station BSCs relative to the vertex?
This memo answers the question.
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