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| The Input 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 input 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 Input Mode Cleaner board]] | = Locking = Lock Settings for IMC. This is required for autolocker to catch lock. |
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| attachment:MC-Schematic.pdf | {{attachment:IMC_Lock_Settings.png|IMC Lock settings}} |
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| === WFS === | = Mode Cleaner Model = . [[MC_model| MC model ]] |
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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 |
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| 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. |
. http://nodus.ligo.caltech.edu:8080/40m/2870 |
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| = Documents = | = Alignment Sensing and Control = . [[MC_WFS| MC Wave Front Sensors ]] |
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| * [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" |
= 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.
Locking
Lock Settings for IMC. This is required for autolocker to catch lock.
Mode Cleaner Model
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"