LIGO Document E1201043-v3
- Acceptance documentation for HAM Small Triple Suspensions (HSTS).
This document will be the overarching acceptance document for OMCS, giving details on documentation etc common to all output modecleaner suspensions and indicating links to individual suspension documentation.
The notes and changes section of this filecard list the headings from Acceptance Review template E1300457-v3, with appropriate links.
PUNCH LIST - Control range doc and noise model doc to be done (Jeff K), Operation Manual (Mark / Norna), Organization of storage (Ops task). Assembly doc - pictures to be added (Jeff B/Norna)
SIGNED - Calum Torrie signature on 24th March 2014 closes this OMCS General Acceptance Doc on behalf of chair and committee .
Punchlist items and their resolution will be tracked in T1400181. They will not be updated on this Acceptance Document filecard.
- v1 is first draft, v2 has minor updates (link to electronics wiki for testing info, and note re updating of OMCS install doc), v3 added links in sections 2c and 7.1 and added fuller SVN info (written by Stuart) in section 8.
Ten headings for acceptance:
1. Requirements documentation
T070189 Design Specifications for the OMC Suspension
T0900079 AdL OMC Suspension Electronics Requirements
RICH. PRESENT. CLOSED.
2. Design overview and detailed design documentation
a) Final Design Document
T0900060 OMC Suspension Final Design Document
CIT REVIEWED. PRESENT. CLOSED.
b) Review reports
https://dcc.ligo.org/LIGO-T1200463 Summary of Suspension Final Design Reviews Items 13 and 15 apply to the OMCS.
FAB SENT NOTES IN E-MAIL. CLOSED.
c) Supporting design documents
Supporting design docs are listed in the above document E1201043.
AH. REVIEWED. PRESENT. CLOSED.
JEFF K TO COMPLETE DOCUMENTS. NAR TO COMPLETE. PUNCH LIST.
JEFF K TO ALSO WORK ON NOISE MODEL WITH DAMPING LOOPS. PUNCH LIST.
CO-ORDINATE SYSTEM LINK - NAR TO ADD
ADD ISC INTERFACE TO SUS - JEFF LEWIS TO ADD LINK!! PUNCH LIST.
Coord. system and ISC interface doc. links have been added in v3 of the above document E1201043 (Norna 21st March 2013)
D0900293: OMCS Overall Assembly with Fixtures: see related documents on this filecard for all assemblies.
e) Bills of Materials
BOMs are found on the assembly and sub-assembly drawing sheets. There is also a separate document E0900061 OMCS Bill of Materials.
f) Interface control
M040189 Record of Decision/Agreement (RODA) - Output Mode Cleaner to be a monolithic cavity
M0900034 Use of SmCo and NdFeB Magnets in Advanced LIGO Suspensions
M0900087 All in vacuum cabling will be shielded
M0900234 SUS (US) blades will use maraging steel 250
M0900271 Division of Responsibilities for Harnesses for Adv. LIGO Suspensions
M1000047 RODA - Decision to modify HAM structures (HLTS, HSTS, OMC)
All of these have been acted on.
REVIEWED. FM. GOOD. CLOSED.
Software is documented on the SVN. Further details of how to access can be found in section 8 of the above document E1201043
h) Design source data
Mechanical CAD models are in PDM works and electronics CAD models are available on the DCC.
3. Materials and fabrication specification
https://dcc.ligo.org/LIGO-E0900023 PROCESS FOR MANUFACTURING CANTILEVER SPRING BLADES FOR AdvLIGO This is referenced on all drawings for blades.
The process used for producing weldments for in-vacuum use for Advanced LIGO is given in the welding specification document E0900048.
4. Parts and in-process spares inventoried
Assemblies are recorded in ICS. Electronics are recorded using the S-number scheme. Storing of spare parts is discussed in T1300908.
5. Assembly procedures
T080117 'Output Mode Cleaner Suspension (OMCS) Assembly Procedure' (currently being updated)
ADDED TO PUNCH LIST. SEE ABOVE.
6. Installation procedures
E070271 'OMCS Installation Procedure'
This was produced for eLIGO and needs updating to capture what was done in aLIGO. Also there is some relevant chamber install documentation, though not specific to HAM6 chambers.
REVIEWED. PRESENT. CLOSED.
Note added by Norna 18th March 2014. Jeff Lewis is updating this document to capture procedures used in aLIGO (current doc gives eLIGO info.) NOW WITH JEFF L.
This action now closed - Jeff L has updated Install doc E070271 (Norna 21st March 2014)
7. Test documents
Suspension testing: https://dcc.ligo.org/LIGO-G1200070 Ideal Order/Contents of aLIGO Triple SUS Testing / Commissioning.
A useful link for key testing procedures is the Checkout/Testing page in the Operation Manual at
Testing related documentation is kept on the SVN repository, as are transfer functions, spectra and B&K results. Further details are given in the document E1201043 including DCC links to other test results such as OSEMs, blades, vibration absorbers etc.
Electronics testing: The results of reports are posted under the serial number of the chassis. Further details in the above document E1201043.
Followed link in E1201043 to E1100337 (Suspension Electronics Drawing Tree). It is not immediately clear to the casual user which electronics are specifically used in the OMCS. Examination of the chamber wiring diagrams is needed to parse out a full list of specific electronics. This search leads to the following subset of electronics used in the OMCS:
D0902747 - Top Coil Driver
D0901284 - UK Satellite Module
D0902783 - AA Chassis
D1000305 - AI Chassis
D1000725 - Binary Output Chassis
D1000726 - Binary Input Chassis
Following the individual links to each of the designs above yields many serial numbers. It is not apparent which subset belongs to the OMCS. Moreover, it is not apparent as to which observatory the electronics are located. I'm not sure it's worth doing anything at this moment to improve the ease with which a user can find data on a specific module or function because we have not really given much thought to the typical scenarios driving such searches. It would be a waste of time and effort to solve the wrong problem.
It is also possible (I didn't try much) that the search would have been better guided to simply go to the rack diagram and see what's installed. Doing this, I can immediately find S1105377, which is the LLO rack diagram for the remote rack located in the CER and is populated with serial numbers. I don't see the rack diagram for the field rack (located out by HAM6). No obviously linked data exists for LHO.
REFER TO https://awiki.ligo-wa.caltech.edu/aLIGO/SuspensionElectronics
8. User interface software
This is found on the SVN. Further details in the document E1201043.
9. Operation Manual
https://dcc.ligo.org/LIGO-E1200633 aLIGO SUS Operation Manual
This covers all suspensions due to large element of commonality
E0900042: AdvLIGO Output Mode Cleaner Hazard Analysis
E1300537: Addendum to E0900042 aLIGO OMC Hazard Analysis
CLOSED. PRESENT. REVIEWED.
DCC Version 3.4.1, contact