Table of contents

LIGO Commissioning Update

Outline

IFO

Noise So Far

S3: peak sensitivities

S3: reliability & stability

Outline 7

Ground 1

Ground 2

HEPI

HEPI 1.5

HEPI II

Train Lock

HEPI Summary

Outline 2

Simple IFO

Optical Layout

Getting High

Optical gain: “10 W” laser

Power Handling

Bad PRC

Thermal Compensation

TCS on the power recycled Michelson: beam images at AS port

Outline 3

Noise Reductions

POB Noise

POB 2

Noise Reductions 2

Phase Noise

Phase Noise 2

Noisy

Good sensitivity

Noise Budget

Outline 8

ASC

Alignment Control

Beam centering

Pre-S4

Slide 39

Warm Fuzzy