Specification : 40m dichroic RC folding mirrors

Document #:

LIGO-E1700016-v6

Document type:

E - Engineering documents

Abstract:

Specification for 2” diameter optic to replace existing (convex) PR3/SR3 at the CIT 40m

Files in Document:

• PR3/SR3 spec (E1700016_v6.pdf, 700.9 kB)

Other Files:

• Expected distributions of R and T on AR side (PR3_AR_consolidated_170516.pdf, 59.8 kB)
• Expected distributions of R and T on HR side (PR3_HR_consolidated_170516.pdf, 60.8 kB)
• Optimized layer structure for HR and AR coatings (PR3_Layers_revised.xlsx, 47.9 kB)
• PR3/SR3 spec (E1700016_v6.docx, 146.1 kB)
• Spectral reflectivity on AR side (PR3_AR_spectralRefl_170416.pdf, 99.2 kB)
• Spectral reflectivity on HR side (PR3_HR_spectralRefl_170416.pdf, 97.0 kB)

Topics:

• Basic R&D
• Upgrades

Authors:

• Gautam Venugopalan
• Eric Gustafson
• Rana Adhikari
• Koji Arai

Keywords:

40m PR3 SR3 RC folding mirror dichroic

Notes and Changes:

v4 - updated MC numbers, adding spreadsheet with histograms from MC analysis. Also added some details about the coating optimization and the assumed dispersion relation.
v5 - updated calculations with dispersion from Ramin, changed constraints on layer thickness in particle swarm optimization
v6 - updated calculation based on new dispersion from Ramin.