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= Vent documentation =

 * [[vent/Fall2021|Vent Fall 2021]]
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== Prep for next vent ==

(1) Dichroic mirror for recycling cavities (Jamie)
 * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=87589|spec in DCC]]
 * wedge angle = 2 deg
 * 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]]

(2) 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)]]
 * '''''being baked...'''''

(3) OSEM mount screws
 * Hex-top, longer, sliver-plated
 * Qty = 100
 * No-plastic
 * '''''[[http://nodus.ligo.caltech.edu:8080/40m/6472|final design]]'''''
 * '''''manufactured and being baked...'''''

(4) Active tip-tilts (Suresh/Jamie)
 * to get:
   * tip-tilts from LHO
   * Electronics
   * Cables including vacuum-compatible ones and the non-vacuum ones
   * Prepare mirrors
   * Assembly and baking
   * Prepare feedthrough connectors
   * Digital controls
 * '''''Suresh is going to LHO April 15-25 for assembly/shipping of tip-tilts...'''''

(5) OMC activation (Jenne)
 * Calculate the mode matching solutions and prepare appropriate telescopes
 * Draw optical layout
 * Digital controls

(6) OSEM upgrade (somebody)
 * Need a discussion

== Previous ==
  * [[vent/checklist|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]]
 * [[vent/201610|2016 October]]
 * [[vent/201605|2016 May-August]]
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Vent documentation

Vent plans

vent (last edited 2021-10-27 19:08:20 by AnchalguptaATligoDOTorg)