Differences between revisions 4 and 32 (spanning 28 versions)

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 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"

-  ⇤ ← Revision 4 as of 2007-01-22 04:48:50 → 
  Size: 441
  Editor: RanaAdhikari
  Comment:
+   ← Revision 32 as of 2011-12-19 22:05:10 → ⇥
  Size: 1031
  Editor: KiwamuIzumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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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 =
 Line 3:
-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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+Line 6:
-attachment:MC-Schematic.pdf
-Line 9:
+Line 7:
-=== WFS ===
-Line 11:
+Line 8:
-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

= 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"