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| * [[vent/checklist|pre-vent/pre-closeup checklists]] == Tasks for Vent of Nov 2018 == * '''Primary objective''' - carry out upgrade of the vacuum control system to Acromag 1. Do we have necessary hardware? 1. Steve has acquired some test Serial->Ethernet converter, needs to be checked and interfaced. 1. use the Polaroid / GoPro to film Steve. * ''Secondary tasks'' - depends on how many chambers we want to open: 1. Fix clipping situation in Y arm. 1. ETMX suspension cage yaw rotation. 1. SRC length adjustment to allow [[https://nodus.ligo.caltech.edu:8081/40m/14164|Signal-Recycled]] locking. 1. Clean arm cavity optics with first contact. 1. Commission existing OMC. 1. Bring back IP POS/ANG ? == 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 == Prep for next vent == (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.''''' (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 (3) Black glass beam dumps * Large baffle style covers for the suspensions * Small V-shape pieces for generic purpose * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=77367|hexagonal]] * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=77543|diamond shaped]] * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=77545|diamond shaped (2inch)]] * --(manufacture)-- * pedestals, clamps? * '''''bake''''' * assemble (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''' (5) New periscope plate * --(manufacture)-- * --(bake)-- * '''ready to install''' * __'''''need shorter pedestals for green PBS and beam dump'''''__ (6) Cavity scattering measurements? (Jan) (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 == Previous == |
* [[vent/checklist|pre-vent/Common Pre-closeup checklists]] * [[vent/planningFall2021|Vent Fall 2021]] * [[vent/planningFall2020 |2020 Fall]] * [[vent/201905 |2019 May]] * [[vent/oldUnknownTime | Unknown Time ]] * [[vent/201812 |2018 October]] * [[vent/201708 |Tasks for next vent after Aug 30 2017]] |
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