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| The Mode Cleaner is a suspended triangular cavity. Each mirror of the triangle is 0.25 kg, 3" in diameter and 1" thick. | = Mode Cleaner = |
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| The mode cleaner length is ~12 m (24 m round trip), the Finesse is ~1300. | . The Input Mode Cleaner is a suspended triangular cavity. Each mirror of the triangle is 0.25 kg, 3" in diameter and 1" thick. |
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| [[Installing the Mode Cleener board]] | The input mode cleaner length is ~13.5 m (27 m round trip), the Finesse is ~1460. Cavity pole is 3.79kHz. |
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| attachment:MC-Schematic.pdf | |
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| === WFS === | |
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| 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. | == 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 == WFS == . [[MC WFS]] == Analog circuits == . [attachment:MC-Schematic.pdf common mode servo circuit board] |
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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
WFS
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"