The Input Mode Cleaner is a suspended triangular cavity. Each mirror of the triangle is 0.25 kg, 3" in diameter and 1" thick.
The input mode cleaner length is ~13.5 m (27 m round trip), the Finesse is ~1460. Cavity pole is 3.79kHz.
Installing the Input Mode Cleaner board
attachment:MC-Schematic.pdf
Beam centering
http://nodus.ligo.caltech.edu:8080/40m/2863
http://nodus.ligo.caltech.edu:8080/40m/2864
http://nodus.ligo.caltech.edu:8080/40m/2867
WFS
Documents
[http://www.ligo.caltech.edu/docs/T/T020145-00.pdf LIGO-T020145-00-R], "Characterization and commissioning of digital suspensions for the 40m Mode Cleaner"
[http://www.ligo.caltech.edu/docs/T/T020147-00.pdf LIGO-T020147-00-R], "Characterizing the length sensing and control system of the mode cleaner in the LIGO 40m lab"