LIGO Document E1201038-v5
- Acceptance documentation for QUAD suspensions.
This document will be the overarching acceptance document for quadruple suspensions, giving details on documentation etc common to all quadruple suspensions.
v1 is first draft of document, some inputs still needed. The notes below are a work in progress, to be completed (Norna)
v2 is second draft of document, with Section 8 (User Interface Software) updated following action from review panel (Stuart).
v3 is third draft with some edits: added link to electronics wiki (under 2c), removed one hazard doc (superceded), a few other minor edits at red placeholders (Norna)
v4: 24 March 2014 added further references in document to section 2c( damping loop design) and 7 ( link to Ops manual for testing procedures)(Norna)
v5 = added in coil driver design requirements link to document (Norna 17 May 2014)
PUNCH LIST - Operation Manual (Mark / Norna), QUAD Top Level drawings (Janeen / Eddie), Organization of spares (Ops task). LHO Electronics Doc tree.
Punchlist items and their resolution will be tracked in T1400181. They will not be updated on this Acceptance Document filecard.
SIGNED - Calum Torrie signature on March 24th 2014 closes this QUAD General Acceptance Doc on behalf of chair and committee .
- Ten headings for acceptance:
1. Requirements documentation
https://dcc.ligo.org/LIGO-T010007 Cavity Optics Suspension Subsystem Design Requirements
2. Design overview and detailed design documentation
a) Final Design Document T1000286
Monolithic Stage Final Design T1000337
See also links at E1100604
b) Review reports
https://dcc.ligo.org/LIGO-T1200463 Summary of Suspension Final Design Reviews of which item 1,2,3,4,5,6,7,8,15,16,17,18,20 are quad related.
References to reports from these reviews are given in T1200463.
(i) 1 and 2 - Jeff Lewis has reviewed. One item back to SUS (Norna) is to ask Jonathan Hanks to fix links in https://awiki.ligo-wa.caltech.edu/aLIGO/Quad_Suspensions/FDR Else closed.
Note added by Norna 27 Feb 2014
Jonathan Hanks has sorted this out. The main link is here
and it has all the missing links added back in.
(ii) 3 and 4 - Alastair comments. He notes that L1000357 and L1000003 contains actions. Norna will have Glasgow review then SUS team.
Question from Norna - i don't believe there are any open actions on L1000357. The ones noted in that document have subsequently been dealt with by Angus as noted in T1200492, the companion doc to the FDR checklist. Please confirm the committee agrees.
The L1000003 open action is being pursued with Glasgow for closure.
This is moving off-line. Norna.
Note added by Norna 26 Feb 2013 - the open action from L1000003 (monitoring bond noise expt. at Glasgow)is now closed, with a note from Angus added to the doc T1200492 'Notes on Completion of Actions from SUS FDRs', section 2.4.
Norna has also requested that Glasgow look over the Monolithic final design review doc T1000521 and update as needed, as it was noted by the review team that it was last updated in 2010
(iii) 7 and 8 - Calum reviewed items 7 and 8. Item 7 is passed back to SUS (Janeen). Item 8 has two questions for SUS i) Was magnets and copper removed? ii) Has this been done to all suspensions including WBSC6 and WBSC8? (Norna)
Betsy confirmed to Norna that all quads being rebuilt at LHO are having copper and magnets removed, if not already done.
Janeen confirmed to Norna that all quads at LLO have their copper and magnets removed.
(iv) Celine 15, 16 - Please send comment via homework or for next week. This is working off-line between Calum / Celine / Norna.
Update: Celine notes that for T050111,BOSEM Design Doc & Test Report, that there are TBDs and TBCs that need filling in on pages 18 & 24. Stuart has been tasked to update T050111 to a -v1.
Celine notes that the AOSEM FDD T0900286 is made for people with iLIGO OSEM knowledge and that is true, as it is based on outstanding comments from the Preliminary Design Review for the osem.
Celine notes that the FDD needs more drawing and BOM references, and that needs to be added. Janeen takes an action. Also, I will add a note to the DCC card for T0900286 that says that these are now called AOSEMs, which they were likely not colloquially called in 2009.
(v) 17 and 18 - We have notes below from RIch on items 17 an 18. These are now closed.
Item 17 Satellite Amplifier and OSEM Fabrication Readiness - July 2009: The actions from the review suggested that documentation be written in the form of a user's guide detailing waveforms and principles of operation for the UK Satellite Amps. It doesn't look as though this was explicitly done (despite the notation saying 'Actions Completed'), but in my opinion there's sufficient information for the experienced user to piece things together from test documents and reports. No further action is deemed necessary.
Item 18 UK Top Driver Pre-production Prototype Bench Test and Evaluation - April 2009: Section 2.2 of T0900170 mentions that the capacitors used in the design are not available in the US, and that sufficient spares should be furnished with these boxes. That was probably never done, but I'm not concerned due to the extremely low likelihood of failure, and our sparing policy. The review report L0900098 includes some motherhood recommendations that I don't believe were ever truly pursued (things like we should strive to improve the output voltage noise at 10Hz etc.). I don't see this as any cause for action at this point.
(vi) Fabrice 6 and 20 - All good. Closed
c) Supporting design documents
Supporting design docs are listed in the above document E1201038.
i) E1200933: aLIGO SUS General Documentation: this DCC filecard lists references to aLIGO SUS documentation that this generic to many or all suspensions. Calum. CLOSED.
ii) E1300848 aLIGO SUS QUAD ESD Documentation. This DCC filecard brings together various documents (mechanical, technical, cabling) addressing aspects of the ESD design. Jeff Lewis, Alastair and Calum + open discussion at meeting. CALUM TO REVIEW and ADD DRAWINGS
iii) T1100595 ETM/ITM Quad Suspension Control Ranges Celine. CLOSED.
iv) T1100185: Summary of technical documentation for University of Birmingham deliverable Fabrice CLOSED
v) E1100337: Suspension Electronics Drawing Tree: this leads to electronics documentation, see also links at E1100604 aLIGO SUS Quad Design Documentation Rich A. TO DO Rich went down many rabbit holes in pursuit of a poorly documented electronics. Overall, there is a consistently good set of documentation should we ever have to recreate a particular circuit board. The only weakness in the drawing tree structure is that LHO does not have rack drawing information yet populated (there are a few, but not much). LLO is in better shape.
ADDED TO PUNCHLIST.
D0901346 Advanced LIGO Quadruple Suspension Assembly
D1000759 Advanced LIGO SUS ETM Production Monolithic Assembly
ACTION ON JANEEN WORKING ON THIS. WILL BE REVIEWED BY CiT ONCE EDDIE COMPLETES and JANEEN REVIEWS.
ADDED TO PUNCHLIST.
e) Bills of Materials
These are on assembly drawings
CLOSED. ALL PRESENT.
f) Interface control
RODAs are listed in the above document E1201038
Rich reviewed RODA M060043 as part of SUS acceptance review. The RODA captures the plan of action and details as to whether or not portions of the SUS cable chain will be shielded. M0900087 serves nicely as a record of the final decision based on the questions raised in M060043.
ALASTAIR AND FABRICE ALSO REVIEWED AND LOOK GOOD. CLOSED.
Norna notes that M060305 (RODA on Compensation Plate dimensions) is out of date. Garilynn confirmed it is on her to-do list to address.
Software is documented on the SVN. Further details of how to access can be found in Section 8 of E1201038
h) Design source data
Mechanical CAD models are in PDM works and electronics CAD models are available on the DCC
CLOSED. ALL PRESENT. CALUM and RICH.
3. Materials and fabrication specification
https://dcc.ligo.org/LIGO-E0900023 PROCESS FOR MANUFACTURING CANTILEVER SPRING BLADES FOR AdvLIGO. Producing acceptable blades is a complex multi-step process which has been developed from external input and internal experience with prototypes over several years.
Particular materials and processes for monolithic parts such as ears and fibres are called out on the relevant drawings.
CLOSED. ALL PRESENT.
4. Parts and in-process spares inventoried
Assemblies are recorded in ICS. Individual spare mechanical parts which have gone through clean and bake are in general recorded in ICS. In some cases spare sub-assemblies have been put together but not yet recorded as such. Electronics are recorded using the S-number scheme. A separate document has been prepared which summarises storing of spare parts, see T1300908.
NOT PROJECT JOB TO DO. ORGANIZE SPARES IS OPS. THIS SHOULD BE ADDED TO PUNCH LIST TO REMIND TO ASK AGAIN. CLOSED
5. Assembly procedures
E1000006 Advanced LIGO Quad Suspension Metal-Build Assembly Procedure
ALL GOOD. COMPLETE DOC. CLOSED.
T1000521 Monolithic Final Design Review Documentation and Drawing Overview
ACTION ON SUS - PLEASE REVIEW AS NOT UPDATED SINCE 2010. Norna working off-line with Glasgow.
Norna reports this has now been updated by Glasgow group (24th March 2014)
E1000366 QUAD Monolithic Fiber Pulling/Welding Procedure ALASTAIR H REVIEWED. ALL GOOD.
6. Installation procedures
T1100406: Quad cartridge installation procedure check list
Chamber installation procedures are also used. These are specific to a chamber and thus will be referenced in the acceptance documentation for specific suspensions.
7. Test documents
G1100693: Ideal Order/Contents of aLIGO QUAD Testing / Commissioning
This is the top level description of testing.
Rich reviewed G1100693 (Ideal Order/Contents of aLIGO QUAD Testing / Commissioning)and found it to be very thorough and well though out. ALL CLOSED.
Testing related documentation is kept on the SVN repository, as are transfer functions, spectra and B&K results. Further details are given in the above document E1201038 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 E1201038.
(Added 24 March 2014 by Norna) - A useful link for key testing procedures is the Checkout/Testing page in the Operation Manual at
Rich reviewed results of electrical testing of QUAD electronics components at both observatories and found LLO to be extremely thorough and LHO to be a work in progress. Only did statistical sampling of 4 or so entries for each observatory where possible. ALL CLOSED.
8. User interface software
This is found on the SVN. Further details in the above document E1201038.
REVIEWED BY JEFF LEWIS.
ACTION SUS - INSTRUCTIONS FOR USE / GUIDELINES? (STUART ASTON)
Updated Section 8 to include an overview and links to relevant Guidelines in the OpsManual - Stuart Aston - 9th Feb 2014
9. Operation Manual
https://dcc.ligo.org/LIGO-E1200633 aLIGO SUS Operation Manual
This covers quads and triple suspensions due to large element of commonality
JEFF LEWIS REVIEWED. ACTION ON SUS - OPERATIONS MANUAL
ADDED TO PUNCH-LIST.
E1000030 QUAD Suspension Metal Assembly Hazard Analysis
M1000334 LHO_CO2 Silica Fiber Welding Machine Operating in the LVEAs and END Station, Standard Operating Procedure
E1100814 Cartridge Assembly Hazard Analysis
E1100976 BSC8 Cartridge Installation Hazard Analysis - REMOVE
Note added to abstract on the DCC filecard for this HA to say it is superceded by E1200925 (Norna 11 Feb 2014)
E1200925 BSC Cartridge Installation (Universal) Hazard Analysis, aLIGO
E1000489 Hazard Analysis for Silica Fiber Pulling and Welding In the LHO Fiber Lab and In the LHO and LLO LVEAs and VEAs
T080231 ERGO Arm Hazard Analysis
ALL ARE SIGNED EXCEPT ONE. E1200925 is signed at v1 only.
DCC Version 3.4.0, contact
Document Database Administrators