Diff for "Reference_Cavity"

Differences between revisions 2 and 4 (spanning 2 versions)

The reference cavity was locked using a 21.5 MHz signal from a rack mounted board (FSS REF - Crystal Frequency Reference [http://www.ligo.caltech.edu/docs/D/D980353-C.pdf]). That turned out to have many problems and we removed it completely from the system circa 2008 with a fixed 21.5 MHz OCXO from Wenzel and an RF Amplifier (see [http://nodus.ligo.caltech.edu:8080/40m/986 elog]).

-  ⇤ ← Revision 2 as of 2007-11-16 22:06:54 → 
  Size: 216
  Editor: TobinFricke
  Comment:
+   ← Revision 4 as of 2009-09-12 09:05:00 → ⇥
  Size: 496
  Editor: RanaAdhikari
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-The reference cavity is locked using a 21.5Mhz signal from a rack mounted board (FSS REF - Crystal Frequency Reference [http://www.ligo.caltech.edu/docs/D/D980353-C.pdf])
+The reference cavity was locked using a 21.5 MHz signal from a rack mounted board (FSS REF - Crystal Frequency Reference [http://www.ligo.caltech.edu/docs/D/D980353-C.pdf]). That turned out to have many problems and we removed it completely from the system circa 2008 with a fixed 21.5 MHz OCXO from Wenzel and an RF Amplifier (see [http://nodus.ligo.caltech.edu:8080/40m/986 elog]).
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+Some FEA of the LIGO/40m reference cavity using COMSOL:
[[/FEA]]