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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. 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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| [[Installing the Mode Cleener board]] | |
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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 |
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| = Documents = | . http://nodus.ligo.caltech.edu:8080/40m/2864 |
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| * [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" |
. http://nodus.ligo.caltech.edu:8080/40m/2867 . http://nodus.ligo.caltech.edu:8080/40m/2870 = Alignment Sensing and Control = . [[MC_WFS| MC Wave Front Sensors ]] = Analog circuits = . [[attachment:MC-Schematic.pdf|common mode servo circuit board]] = Documents and Links = * [[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" * [[RF_ASC]], "Interferometer Wave Front Sensing" |
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
Alignment Sensing and Control
Analog circuits
Documents and Links
LIGO-T020145-00-R, "Characterization and commissioning of digital suspensions for the 40m Mode Cleaner"
LIGO-T020147-00-R, "Characterizing the length sensing and control system of the mode cleaner in the LIGO 40m lab"
RF_ASC, "Interferometer Wave Front Sensing"