ECR: SRC alignment with a new 118.3 MHz modulation scheme

Document #:

LIGO-E1700327-v1

Document type:

E - Engineering documents

Abstract:

We are proposing a new scheme for aligning the signal-recycling cavity, based on a new modulation frequency of 118.3 MHz and by demdodulating the AS WFS by 72.8 MHz.

Files in Document:

• E1700327-v1.pdf (174.3 kB)

Other Files:

• E1700327-v1.docm (28.1 kB)

Topics:

• Sensing and Control

Authors:

• Daniel Sigg
• Hang Yu

Keywords:

ECR

Notes and Changes:

IIET is https://services.ligo-la.caltech.edu/FRS/show_bug.cgi?id=9110

More works needs to be done to define required changes to the modulation scheme.

Approved by Dennis Coyne & Peter Fritschel