• Mode_Cleaner

Mode Cleaner

• 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.

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

• http://nodus.ligo.caltech.edu:8080/40m/2870

Alignment Sensing and Control

• MC Wave Front Sensors

Analog circuits

• [attachment:MC-Schematic.pdf common mode servo circuit board]

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"