A+/O5 strain curve projections

Document #:

LIGO-T2500310-v2

Document type:

T - Technical notes

Abstract:

This document contains new projections of strain noise spectra for LIGO for the O5 observing
run. We are taking the run designation O5 to apply only once all LIGO test masses have
been replaced with A+ test masses that have lower coating thermal noise. The projections
are given for a scenario where there are three epochs of O5 (a, b, c), with increased sensitivity from epoch to epoch. The last epoch, O5c, is thus foreseen as reaching the final sensitivity for the A+ upgrade.

Files in Document:

• Updated_O5_projections.pdf (604.8 kB)

Other Files:

• Text file of strain noise versus frequency data (O5StrainCurves_freqabc.txt, 512.3 kB)

Topics:

• A+ Project

Authors:

• Peter Fritschel
• Begum Kabagoz
• Kevin Kuns
• Anamaria Effler

Keywords:

modelling A+ O5

Notes and Changes:

v2: Sentence added to the Overview about the scope of the document.

Related Documents:

• LIGO-T1800042: The A+ design curve
• LIGO-T2200287: Report of the LSC Post-O5 Study Group

Referenced by: