Design Requirement Document of the A+ filter cavity and relay optics for frequency dependent squeezing

Document #:

LIGO-T1800447-v4

Document type:

T - Technical notes

Abstract:

DRD for frequency dependent squeezing in A+

Files in Document:

• Design document (FC_DRD-v4.pdf, 7.8 MB)

Other Files:

• latex sources (DRD_T1800447.tar.gz, 22.7 MB)

Topics:

• A+ Project

Authors:

• Lee McCuller
• Lisa Barsotti

Notes and Changes:

Version 4:
Realized that the 2*E_lambda quantum noise is not correct for general noise-limited sensitivity calculations. Must use E_lambda / 2 for quantum PSD. Drops safe limit on all curves by a factor of 2 ASD, lowering margins but not changing design conclusions.

Version 3: includes the calculation of vertical to longitudinal noise coupling due to a possible inclination of the filter cavity beam axis by 3 mrad, as well as a summary of the the calculation done by Mike Z. et al about requirements of the vacuum system.

Related Documents:

• LIGO-E1900223: Review Report Design Requirements and Concept for the A+ ISC Filter Cavity and Relay Optics