|
Size: 1915
Comment:
|
Size: 5287
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 2: | Line 2: |
== Vent Fall 2021 == [[vent/planningFall2021|Planning page for Vent in Fall 2021]] ______________________________________ * [[vent/checklist|pre-vent/pre-closeup checklists]] == Tasks for Vent of Fall 2020 == * '''Primary objective''' - re-glue broken magnet on ETMY and re-suspend it. 1. Take back the 70% light split off to the OMC in the AS path. 1. Investigate TT hysterisis [low priority as this would require 3rd door to be off]. [[vent/planningFall2020|planning page]] == Tasks for Vent of May 2019 == * '''Primary objective''' - Suspension diagnosis 1. Fix ETMY (one eigenmode missing?) and ITMY (frequently gets stuck) suspension 1. Check that the AS beam exits the vacuum cleanly. Take back the 70% light split off to the OMC in the AS path. 1. Investigate TT hysterisis == Tasks for next vent after Aug 30 2017 - not in any particular order == * Installing new RC folding mirrors, PR3 and SR3 (we need to get the actual optics + new Tip-Tilt suspension design) * Flip existing PR2 and SR2 * Installation of Ruby standoffs for selected optics (we need to get a better magnet gluing fixture ready) * MC1 suspension inspection and fixing * ITMX magnet re-gluing * Baffling (?) * Installation of steering mirrors to facilitate viewing of optic faces with GigE cameras * FC cleaning |
|
| Line 5: | Line 36: |
| (1) Dichroic mirror for recycling cavities (Kiwamu) * Figure out required spec * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=87589|spec in DCC]] * wedge angle = 2 deg * dichroic mirror quotes: [[https://wiki-40m.ligo.caltech.edu/vent?action=AttachFile&do=get&target=ATF.pdf|ATF]] [[https://wiki-40m.ligo.caltech.edu/vent?action=AttachFile&do=get&target=Laseroptik.pdf|Laseroptik]] [[https://wiki-40m.ligo.caltech.edu/vent?action=AttachFile&do=get&target=Laseroptik2dw.pdf]] |
(1) Dichroic mirror replacements for PR3 and SR3 * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=87589|spec in DCC]] * quotes: * --([[https://wiki-40m.ligo.caltech.edu/vent?action=AttachFile&do=get&target=ATF.pdf|ATF]])-- * '''[[https://wiki-40m.ligo.caltech.edu/vent?action=AttachFile&do=get&target=Laseroptik.pdf|Laseroptik (final)]]''' * note: 2 deg wedge quote has Fused Silica grade F = 5 ppm homogeneity & micro roughness 0.3 nm RMS, Rana OKed both, 3 wks delivery, Jamie takes care of ordering * [[Optical_Layout#PR3SR3|Optical table layout needs to be modified]] * --([[http://nodus.ligo.caltech.edu:8080/40m/6907|optics in hand]])-- * __'''''phase map of mirror, in and out of tip-tilt mounts'''''__ * '''''what resolution do we need? Need to measure curvature.''''' |
| Line 14: | Line 47: |
| * [[Optical_Layout#PR3SR3|Optical table layout needs to be modified]] | (2) [[Suspensions/Tip_Tilts_IO|IO Active tip-tilts]] (Suresh/Jamie) * --(Suresh is going to LHO April 15-25 for assembly/shipping of tip-tilts)-- * tip-tilts: * --(tip-tilts from LHO)-- * --(bake)-- * --(assemble)-- * add mirrors * level * in-vac cables (quadrapuses) * __'''''ship parts to RND Cables'''''__ * __'''''place order with RND Cables'''''__ * bake * electronics: * gather components: * DAC * anti-image filters * dewhite filters * coil drivers * eurocrate * cables * install * test in DAQ |
| Line 16: | Line 70: |
| * Get a quote from ATF. * Qty = 3 (2 + 1 spare ) * Start ordering (in a week) (2) Black glass beam dumps (Koji) |
(3) Black glass beam dumps |
| Line 26: | Line 76: |
| * --(manufacture)-- * pedestals, clamps? * '''''bake''''' * assemble |
|
| Line 27: | Line 81: |
| (3) OSEM mount screws (Steve) * Hex-top, longer, sliver-plated * Qty = 100 * No-plastic * http://131.215.115.52:8080/40m/6232 |
(4) OSEM mount screws * requirements: * Hex-top, longer, sliver-plated * Qty = 100 * No-plastic * '''[[http://nodus.ligo.caltech.edu:8080/40m/6472|final design]]''' * --(manufacture)-- * --(bake)-- * '''ready to install''' |
| Line 33: | Line 91: |
| (4) Active tip-tilts (Suresh/Jamie) * Electronics * Cables including vacuum-compatible ones and the non-vacuum ones * Prepare mirrors * Assembly and baking * Prepare feedthrough connectors * Digital controls |
(5) New periscope plate * --(manufacture)-- * --(bake)-- * '''ready to install''' * __'''''need shorter pedestals for green PBS and beam dump'''''__ |
| Line 41: | Line 97: |
| (5) OMC activation (Jenne) * Calculate the mode matching solutions and prepare appropriate telescopes * Draw optical layout * Digital controls |
(6) Cavity scattering measurements? (Jan) |
| Line 46: | Line 99: |
| (6) OSEM upgrade (somebody) * Need a discussion |
(7) Loss Measurements * Improve resolution in the scope * Configs to '''measure''': * X-arm misaligned * validate insensitivity to misalignment * Y-arm misaligned * validate insensitivity to misalignment * ~3-5 different beam positions each * * '''Analysis''' * Sources of error? (8) OMC Commissioning * '''Electronics''' * DB-? cables from the DAC to HV drives * Goal is to align onto OMC trans PDs * Extra PD on AS table can be used for 'backup' in-air PD * '''Locking Script''' * Scan the OMC cavity before the vent, make sure script works * Lock before vent to ensure procedure makes sense. * '''Chambers to Open''' * OMC Chamber only * '''Align into PDs''' * Lock OMC using OMC REFL signal * Align transmitted beam into TRANS PDs * Will require ~1 day of work * '''Backup Plan''' * If the PDs don't work as expected, steer beam to the AS table * Rotate and move (+x) SM5, which directs the beam to the TRANS PDs * Beam will come out near the current AS beam * may have to remove one extra steering mirror (SM5 trans PO) (9) Review IP{ANG,POS} alignment/closeup proceedure |
| Line 50: | Line 135: |
| * [[vent/201812 |2018 October]] * [[vent/201610|2016 October]] * [[vent/201605|2016 May-August]] |
Vent plans
Vent Fall 2021
Planning page for Vent in Fall 2021
* Primary objective - re-glue broken magnet on ETMY and re-suspend it.
Primary objective - Suspension diagnosis
(1) Dichroic mirror replacements for PR3 and SR3 note: 2 deg wedge quote has Fused Silica grade F = 5 ppm homogeneity & micro roughness 0.3 nm RMS, Rana OKed both, 3 wks delivery, Jamie takes care of ordering what resolution do we need? Need to measure curvature. (2) IO Active tip-tilts (Suresh/Jamie) Suresh is going to LHO April 15-25 for assembly/shipping of tip-tilts tip-tilts from LHO bake assemble (3) Black glass beam dumps manufacture bake (4) OSEM mount screws manufacture bake ready to install (5) New periscope plate manufacture bake ready to install (6) Cavity scattering measurements? (Jan) (7) Loss Measurements Configs to measure: Analysis (8) OMC Commissioning Electronics Locking Script Chambers to Open Align into PDs Backup Plan (9) Review IP{ANG,POS} alignment/closeup proceedure
Tasks for Vent of Fall 2020
Tasks for Vent of May 2019
Tasks for next vent after Aug 30 2017 - not in any particular order
Prep for next vent
phase map of mirror, in and out of tip-tilt mounts
ship parts to RND Cables
need shorter pedestals for green PBS and beam dump Previous