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 ~12 m (24 m round trip), the Finesse is ~1300.

Installing the Input Mode Cleaner board

attachment:MC-Schematic.pdf

WFS

To adjust the WFS offsets, watch the C1IOO_WFS_HEADS screen and run the script /cvs/cds/caltech/scripts/MC/WFS/McWFS_dc_offsets to ezcaservo the readbacks to zero.

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"

OUTPUT MODE CLEANER The Output Mode Cleaner is mounted into a monolithic copper block cavity, with three fixed mirrors and one PZT length-controlled mirror.

Documents

attachment:LIGO-D050379-C attachment:LIGO-D050366-B attachment:LIGO-D050369-C attachment:LIGO-D050370-B attachment:LIGO-E050336-00

• [http://www.ligo.caltech.edu/docs/T/T020145-00.pdf LIGO-D050379-C], "OMC4 Assembly"

• [http://www.ligo.caltech.edu/docs/T/T020145-00.pdf LIGO-D050366-B], "OMC Bezel"

• [http://www.ligo.caltech.edu/docs/T/T020145-00.pdf LIGO-D050369-C], "OMC Body"

• [http://www.ligo.caltech.edu/docs/T/T020145-00.pdf LIGO-D050370-B], "OMC Cover"

• [http://www.ligo.caltech.edu/docs/T/T020145-00.pdf LIGO-E050336-00], "DCN OMC ASSY 40M"