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chara:operating_procedures [2023/05/18 14:30]
gail_stargazer 		chara:operating_procedures [2023/06/05 20:54]
gail_stargazer
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 3.9. Beacon Alignments 3.9. Beacon Alignments
  
-The beacons wil<font 14px/Arial,Helvetica,sans-serif;;inherit;;inherit>l need to be aligned before g</font>oing on sky and are usually done after the lab is aligned, after the pops have been changed and M10 mirrors aligned, before sunset and again before slewing. Make sure the carts are not at the front when performing these alignments or the labao alignments will be off. Move the carts to 5m or farther from the home switch. The beacon alignments consist of opening the proper mirror, beacon and fiber covers, turning on the beacons and tel WFS cameras and labao displays, and aligning and focusing the red and blue beacons to the respective boxes on the tel WFS and labao. The obsgtk will display a green message at the bottom to confirm each alignment sequence has completed.+The beacons wil<font 14px/Arial,Helvetica,sans-serif;;inherit;;inherit>l need to be aligned before g</font>oing on sky and are usually done after the lab is aligned, after the pops have been changed and M10 mirrors aligned, before sunset and again before slewing. The telescopes need to be at the stow position. Make sure the carts are not at the front when performing these alignments or the labao alignments will be off. Move the carts to 5m or farther from the home switch. The beacon alignments consist of opening the proper mirror, beacon and fiber covers, turning on the beacons and tel WFS cameras and labao displays, and aligning and focusing the red and blue beacons to the respective boxes on the tel WFS and labao. The obsgtk will display a green message at the bottom to confirm each alignment sequence has completed.
  
 In the WFS tab of the telescope GUI or the CONTROL tab of the obsgtk, turn on the red LED, open the fiber covers, then beacon flat covers. The CAMERALINK and WFS server are now part of Bootlaunch script and the ANDOR camera power should always be on in the POWER gui. Open M5 and M7 covers. In the WFS tab of the telescope GUI or the CONTROL tab of the obsgtk, turn on the red LED, open the fiber covers, then beacon flat covers. The CAMERALINK and WFS server are now part of Bootlaunch script and the ANDOR camera power should always be on in the POWER gui. Open M5 and M7 covers.
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 To lock the star, hit [MOVE] on the Main Tab of the Telescope GUI and then click the right star to bring the star to the ACQ hole. Turn on the TWFS tiptilt and DM servo on scopes that have it. Make sure the twfs tiptilt spots window show green dots that show the servo is tracking. Turn on the labao servo and DM AUTO on all scopes. All values should move to zero or near zero when the servos are on. To lock the star, hit [MOVE] on the Main Tab of the Telescope GUI and then click the right star to bring the star to the ACQ hole. Turn on the TWFS tiptilt and DM servo on scopes that have it. Make sure the twfs tiptilt spots window show green dots that show the servo is tracking. Turn on the labao servo and DM AUTO on all scopes. All values should move to zero or near zero when the servos are on.
  
-Special additional alignments when IR flux is low - SEE NEW IR ALIGNMENT PROCEDURES INSTEAD OF DOING THIS+<font inherit/inherit;;#7f8c8d;;inherit>OBSOLETE: Special additional alignments when IR flux is low - SEE NEW IR ALIGNMENT PROCEDURES INSTEAD. INSERT HERE WHEN FINALIZED.</font>
  
-If the flux is low on telescopes on pop 5 or 4, there can be a misalignment of the IR starlight with respect to the blue beacon due to low elevation and the long distance to the lab. If this is the case, follow these steps to improve the flux.+<font inherit/inherit;;#7f8c8d;;inherit>If the flux is low on telescopes on pop 5 or 4, there can be a misalignment of the IR starlight with respect to the blue beacon due to low elevation and the long distance to the lab. If this is the case, follow these steps to improve the flux.</font>
  
-On the obsgtk, set the beacon step size to 222 or 333. Click the Left button while watching the MIRCX flux plot or the STST image display. If watching the MIRCX flux plot, look for increases in flux after a click or two. Allow the DM AUTO function to adjust the blue beacon after each step by not moving the beacon out of the boxes. Remap the fiber to see if the flux is further increased when the labao has recentered the beacon. If using the STST, move the image flux towards the reference position set by the STS or CHARA beams.+<font inherit/inherit;;#7f8c8d;;inherit>On the obsgtk, set the beacon step size to 222 or 333. Click the Left button while watching the MIRCX flux plot or the STST image display. If watching the MIRCX flux plot, look for increases in flux after a click or two. Allow the DM AUTO function to adjust the blue beacon after each step by not moving the beacon out of the boxes. Remap the fiber to see if the flux is further increased when the labao has recentered the beacon. If using the STST, move the image flux towards the reference position set by the STS or CHARA beams.</font>
  
 5.7 Locking Lab Tiptilt (only used in special cases) 5.7 Locking Lab Tiptilt (only used in special cases)
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 With the star aligned with the acquisition ticks, check to make sure there are counts on the TipTilt server or the white plots in the TT windows have condensed. On the Main Tab of the Telescope GUI, click [TIP/TILT] under the Pointing Servo menu. If this button is not pressed, then the green dots on the tiptilt windows will drift and eventually drop TT lock. The [STAR ACQUIRED] button on Cosmic Debris also starts the Tiptilt servo for all active scopes with one push of a button. On the Tiptilt Servo Control GUI, turn tiptilt [ON] for each telescope or use the [TT ON] button on Cosmic Debris to perform this function for all active scopes. With the star aligned with the acquisition ticks, check to make sure there are counts on the TipTilt server or the white plots in the TT windows have condensed. On the Main Tab of the Telescope GUI, click [TIP/TILT] under the Pointing Servo menu. If this button is not pressed, then the green dots on the tiptilt windows will drift and eventually drop TT lock. The [STAR ACQUIRED] button on Cosmic Debris also starts the Tiptilt servo for all active scopes with one push of a button. On the Tiptilt Servo Control GUI, turn tiptilt [ON] for each telescope or use the [TT ON] button on Cosmic Debris to perform this function for all active scopes.
 +
 +Offloading DM Tilt to M7
 +
 +Old method: DMTILT is gray (reconstructor ignores tilt). M7AUTO will adjust M7 to keep blue beacon centroids aligned to labAO WFS.
 +
 +New method: DMTILT is green (use tilt when computing reconstructor). DMAUTO will use DM to correct for tilt and offload to M7 when magnitude of tilt is beyond range of DM.
  
 Acquisition Laser Alignment if the star does not lock in Tiptilt Acquisition Laser Alignment if the star does not lock in Tiptilt
chara/operating_procedures.txt ยท Last modified: 2023/09/01 02:50 by gail_stargazer

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