DCN: Remove laser diode power monitoring from Optical Lever system
- Document #:
- LIGO-E1500154-x0
- Document type:
- E - Engineering documents
- Abstract:
- Change: Remove laser diode power monitoring from the optical lever system.
HAM Table and Optics levers: from D1002740-v5 to D1002740-v6 (pg 16 changed)
ITMS and BS: from D1100022-v11 to D1100022-v12 (pg 21 changed)
ETMs: from D1002741-v7 to D1002741-v8 (pg 16 changed) Reason/background: All optical levers have the ability to readout out laser diode power monitors. Readout channels for these monitors were an intended part of the Optical Lever design per these drawings: HAM Table and Optics levers
https://dcc.ligo.org/LIGO-D1002740, pg 16
ITMS and BS
https://dcc.ligo.org/LIGO-D1100022, pg 21
ETMs
https://dcc.ligo.org/LIGO-D1002741, pg 16 such that we could assess (and perhaps alarm on) the health of the optical lever lasers. As of Feb-2015 neither observatory has laid the necessary cabling for this system, nor are their channels built into in the SUSAUX front-end code expecting them. A decision has been made to eliminate the laser diode power monitoring from the baseline design. See integration issue #1017:
https://services.ligo-wa.caltech.edu/integrationissues/show_bug.cgi?id=1017
- Files in Document:
- None
- Topics:
- Authors:
- Related Documents:
- LIGO-D1100022-v12: aLIGO SUS ITM and BS System Wiring Diagrams (for H1/L1)
- LIGO-E1500155: ECR: Remove Laser Diode Power Monitors from the Optical Lever System Design