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chara:operating_procedures [2023/02/08 19:18]
charaobs 		chara:operating_procedures [2023/05/18 14:23]
gail_stargazer
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 \\ \\
-__**SUPPLEMENTAL INFORMATION**__ \\+__**SUPPLEMENTAL INFORMATION**__ 
 + 
 +[[:chara:new_alignment_procedures|New Alignment Procedures]]\\
 [[:chara:remote_observing|Remote Observing]]\\ [[:chara:remote_observing|Remote Observing]]\\
 [[:chara:power_outage|Shutting Down prior to a Power Outage]]\\ [[:chara:power_outage|Shutting Down prior to a Power Outage]]\\
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 1.2 The Metrology Laser 1.2 The Metrology Laser
  
-A high-powered infrared laser is used for the delay line metrology. This is an eye hazard, so before entering the lab check to make sure the red light above the door is not on. If the laser is activated, it is a must to put on IR-protective goggles. If you are not sure, wear the goggles. Please note that the METLAS gui or OPLE controller gui may not show the corect state of the laser. Hit reopen on the METLAS gui if it does not agree with the others.+A high-powered infrared laser is used for the delay line metrology. This is an eye hazard, so before entering the lab check to make sure the red light above the door is not on. If the laser is activated, it is a must to put on IR-protective goggles. If you are not sure, wear the goggles. Please note that the METLAS gui or OPLESystem Controller gui may not show the correct state of the laser. Hit reopen on the METLAS gui if it does not agree with the others.
  
 1.3 General Lab Rules 1.3 General Lab Rules
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 Go into vacuum pump shack. Flip on power switch for pump and wait for the blower to go on in about 6 seconds. Open the valve slowly after about 10-12 seconds (parallel to pipe means open). Note if fan cords are plugged into wall outlet to keep pumps cool in the summer. Note oil temperature when you start up. Oil temps are usually kept above 15º C by a block heater on the north side of the pump and a space heater on the south side. Inform Larry or Craig if the oil temp is low and the heaters did not run to bring the temp up before starting.\\ Go into vacuum pump shack. Flip on power switch for pump and wait for the blower to go on in about 6 seconds. Open the valve slowly after about 10-12 seconds (parallel to pipe means open). Note if fan cords are plugged into wall outlet to keep pumps cool in the summer. Note oil temperature when you start up. Oil temps are usually kept above 15º C by a block heater on the north side of the pump and a space heater on the south side. Inform Larry or Craig if the oil temp is low and the heaters did not run to bring the temp up before starting.\\
-Go into lab building, check pressures on Vacmon display. If pressure is higher than 100 torr in any of the lines, pump those lines only one at a time. Open each valve slowly, you will hear the air rush out as the pump pulls the air. Slowly continue to fully open. Open each valve as the pressure is pumped down to the pressure in the next lowest line. Ideally, you don't want to allow pressure from one line into the line of a lower pressure line. The final pressure should be around 0.5 - 1.0 Torr in each line when you leave the lab area. The pump will normally bring all 6 lines down to .2-.3 Torr after about an hour. The S1 and S2 lines leak the most during the day and will read the highest in the afternoon when you return, usually between 20-30 Torr in the summer and 15-25 Torr in the winter. Note any unusual vacuum readings as they can indicate a leak beyond what is normal. Sometimes a line isn't pumped down the night before and can read higher than 30 Torr. Pump down the highest ones first as stated above.+Go into lab building, check pressures on Vacmon display. If pressure is higher than 100 torr in any of the lines, pump those lines only one at a time. Open each valve slowly, you will hear the air rush out as the pump pulls the air. Slowly continue to fully open. Open each valve as the pressure is pumped down to the pressure in the next lowest line. Ideally, you don't want to allow pressure from one line into the line of a lower pressure line. The final pressure should be around 1.0 Torr in each line when you leave the lab area if all six lines are opened. The pump will normally bring all 6 lines down to .2-.3 Torr after about an hour. The S1 and S2 lines leak the most during the day and will read the highest in the afternoon when you return, usually between 20-30 Torr in the summer and 15-25 Torr in the winter. Note any unusual vacuum readings as they can indicate a leak beyond what is normal. Sometimes a line isn't pumped down the night before and can read higher than 30 Torr. Pump down the highest ones first as stated above.
  
 2.2 Filling NIRO with LN2\\ 2.2 Filling NIRO with LN2\\
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 In the WFS GUI or obsgtk, turn the cooler on (COOL ON) and open the camera shutter (SOPEN) or SHUTTER (OPEN/CLOSE), then CameraLink on (CL ON) if it is off, Camera on (CAM ON), and start TWFS display (MOVIE). For the scopes with DMs, use the POWER ON button on the WFS GUI (WFS/AO tab) to power the DM on, make sure that the DM current and temperature are displaying numbers. In the WFS GUI or obsgtk, turn the cooler on (COOL ON) and open the camera shutter (SOPEN) or SHUTTER (OPEN/CLOSE), then CameraLink on (CL ON) if it is off, Camera on (CAM ON), and start TWFS display (MOVIE). For the scopes with DMs, use the POWER ON button on the WFS GUI (WFS/AO tab) to power the DM on, make sure that the DM current and temperature are displaying numbers.
 +
 +**NOTE:**  There are now two sets of boxes on the TWFS. The blue boxes are for locking on starlight and are the default reference position. The green boxes can be offset from these to correct for the misalignment between the beacon and the IR starlight. At the beginning of the night, the red beacon must be aligned to the blue starlight boxes with the telescope at stow (see [[:chara:new_alignment_procedures|New Alignment Procedures]]). You can zero out any offsets between the green beacon boxes and the blue starlight boxes on the telescope WFS using ZERO BCN.
  
 Turn on the ACQ camera in the obsgtk. Make sure that the beacon is going through the hole in the acquisition display. If not, use Beacon UP/DOWN etc buttons on a HUT gui or WFS tab on the obsgtk to move it into the hole. Look for spots to be in boxes on the WFS display. Turn on the boxes on the obsgtk (NOBOX) to see how the alignment is. The boxes may be in the default position or may be moved to a position that worked better when observing. Align to whichever gives a more even illumination of spots in the boxes. As the red beacon is bright, use low gains, ie. 30-50 for the BARE dichroic or 200/300 for the IR dichroic, to make these alignments. If the red beacon spots on the WFS display are in the boxes, press (ALIGN BEACON) on the ALIGN tab on the TWFS GUI or (ALIGN) TELWFS: on the obsgtk, wait for completion. The values should reach zero in both the X and Y axes. The default maximum number of tries is 10 so if it is not aligned before it ends, repeat the step if needed. Turn on the ACQ camera in the obsgtk. Make sure that the beacon is going through the hole in the acquisition display. If not, use Beacon UP/DOWN etc buttons on a HUT gui or WFS tab on the obsgtk to move it into the hole. Look for spots to be in boxes on the WFS display. Turn on the boxes on the obsgtk (NOBOX) to see how the alignment is. The boxes may be in the default position or may be moved to a position that worked better when observing. Align to whichever gives a more even illumination of spots in the boxes. As the red beacon is bright, use low gains, ie. 30-50 for the BARE dichroic or 200/300 for the IR dichroic, to make these alignments. If the red beacon spots on the WFS display are in the boxes, press (ALIGN BEACON) on the ALIGN tab on the TWFS GUI or (ALIGN) TELWFS: on the obsgtk, wait for completion. The values should reach zero in both the X and Y axes. The default maximum number of tries is 10 so if it is not aligned before it ends, repeat the step if needed.
  
-Turn labao camera (ON) and (START) the display. Make a dark with the MKDRK button in the LABAO section of the obsgtk. Turn on the blue beacon. The blue beacon should show spots on the LABAO display. Adjust the FPS lower if they are dim. 100 FPS is the default, but 40 is often used for observing. Set the M7 mirror to the default position, then use the DICHROIC buttons on the WFS tab of the telescope gui, obsgtk or HUT gtk to get them in the boxes. When the spots are inside the boxes, press (SCOPE DICH) button in the ALIGN tab on the LABAO GUI or the (ALIGN) LABAO: on the obsgtk to align the spots.+Turn labao camera (ON) and (START) the display. Make a dark with the MKDRK button in the LABAO section of the obsgtk. Turn on the blue beacon. The blue beacon should show spots on the LABAO display. Adjust the FPS lower if they are dim. 100 FPS is the default, but 40 is often used for observing. **Set the M7 mirror to the default position.**  Then use the DICHROIC buttons on the WFS tab of the telescope gui, obsgtk or HUT gtk to get them in the boxes. When the spots are inside the boxes, press (SCOPE DICH) button in the ALIGN tab on the LABAO GUI or the (ALIGN) LABAO: on the obsgtk to align the spots.
  
 If the spots do not show at all in the labao, the scope dichroic is likely out of alignment. Turn on the lab laser and set it to ND 4.0. Look for additional spots in the ACQ window that are not from the beacon. Use the Dichroic controls to make the laser spots match the blue beacon spots on the ACQ camera view. Up is to the upper right in the ACQ view. If they are way off or not visible in the ACQ, you can hit the button for the appropriate dichroic in the HUT gui and it will set the dichroic to its last saved default position. If the spots do not show at all in the labao, the scope dichroic is likely out of alignment. Turn on the lab laser and set it to ND 4.0. Look for additional spots in the ACQ window that are not from the beacon. Use the Dichroic controls to make the laser spots match the blue beacon spots on the ACQ camera view. Up is to the upper right in the ACQ view. If they are way off or not visible in the ACQ, you can hit the button for the appropriate dichroic in the HUT gui and it will set the dichroic to its last saved default position.
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 5.2 Opening telescope optics \\  \\ 5.2 Opening telescope optics \\  \\
-When the sun has set and before it is dark enough to slew to your first target, you can begin opening the telescope optics. Open the telescope optics one by one using the Control Tab on the Telescope GUIs: [M1 OPEN] - opens the primary mirror cover (takes ~ 3 minutes to open), [M3 OPEN], [M5 OPEN], [M7 OPEN], and [FIND OPEN] if you want the finder. Note that the W2 and E1? finder covers require two clicks of the [OPEN] button to fully open. Monitor progress of the M1 and M3 covers by using [SPY2] camera on the telescope TV screens. Wait for all covers to open. The Telescope Monitor reports the status of all mirror covers. Close and reopen the Telescope Monitor if it reads UNKNOWN for a telescope, even after hitting REOPEN.+About 20 minutes after the sun has set, it is dark enough to slew to your first target and you can begin opening the telescope optics. Open the telescope optics one by one using the Control Tab on the obsgtk: [M1 OPEN] - opens the primary mirror cover (takes ~ 3 minutes to open), [M3 OPEN], and [FIND OPEN] if you want the finder. Note that the W2 and E1? finder covers require two clicks of the [OPEN] button to fully open. Monitor progress of the M1 and M3 covers by using [SPY2] camera on the telescope TV screens. Wait for all covers to open. The Telescope Monitor reports the status of all mirror covers. Close and reopen the Telescope Monitor if it reads UNKNOWN for a telescope, even after hitting REOPEN.
  
 5.3 Check the OPLE carts \\  \\ 5.3 Check the OPLE carts \\  \\
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 Locking Tiptilt using the telescope WFS Locking Tiptilt using the telescope WFS
 +
 +[[:chara:new_alignment_procedures|See New Alignment Procedures.]]
  
 Before locking the star, align the twfs to the red beacon, align the blue beacon to the labao, focus the labao and then focus the twfs as shown before. Turn off the red LED and you are ready to lock the star. Before locking the star, align the twfs to the red beacon, align the blue beacon to the labao, focus the labao and then focus the twfs as shown before. Turn off the red LED and you are ready to lock the star.
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 5.6 Locking Lab Tiptilt (only used in special cases) 5.6 Locking Lab Tiptilt (only used in special cases)
 +
 +See New Alignment Procedures.
  
 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.
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 Close the OPLE server. Close the OPLE server.
  
-Press the shutdown button on the OPLE System Control gui, wait until all 6 dots are grey, press the Metro button, and wait until it is grey, turn off the metrology laser.+Press the shutdown button on the OPLE System Control gui, wait until all 6 dots are grey, press the Metro button, and wait until it is grey. Close the gui on Wazoo. Turn off the metrology laser.
  
 6.7 Shutting down the Lab \\  \\ 6.7 Shutting down the Lab \\  \\
 Go to the lab and close the vacuum valves for all telescope lines (valve handle turned perpendicular to the tube). Go outside to the pump shack and close the vacuum valve. Then shut off the vacuum pump. Note any unusual noises or excessive oil temps (above 54 C) reported by the thermometer. Let Craig, Victor or Steve know of any concerns. Lock the padlock. \\ Go to the lab and close the vacuum valves for all telescope lines (valve handle turned perpendicular to the tube). Go outside to the pump shack and close the vacuum valve. Then shut off the vacuum pump. Note any unusual noises or excessive oil temps (above 54 C) reported by the thermometer. Let Craig, Victor or Steve know of any concerns. Lock the padlock. \\
-Go inside the lab with booties: Turn off the silver box, then black box for NIRO and replace the NIRO camera cover if used. Turn off the key for the green alignment laser and turn the power switch off. Turn off Pico 3 controller above the tiptilt camera. Turn off the blue amplifiers for the metrology laser (button is labeled "line") * Turn off the key for the metrology laser and place it on top of the laser box. Shut off lights when exiting the lab building. Return your booties to the basket if good or to the trash if they have holes in them. Make sure all doors are closed as you leave.+Go inside the lab with booties: Turn off the silver box, then black box for NIRO and replace the NIRO camera cover if used. Turn off the key for the green alignment laser and turn the power switch off. Turn off Pico 3 controller above the tiptilt camera. Turn off the blue amplifiers for the metrology laser (button is labeled "line") * Turn off the key for the metrology laser and place it on top of the laser box. Shut off lights when exiting the lab building. Return your booties to the basket if good or to the trash if they have holes in them. 
 + 
 +Check the 6 ople computers and RPC's for any components that were not turned off in the OPLESystem Control gui shutdown sequence. Any + signs on the power controllers indicate power was left on. E1 computer is usually on. Push the Off button to turn off the component that is on. Scroll left and right using the UP/DOWN buttons to move to each + sign. Make sure all doors are closed as you leave.
  
 6.8 Odds and ends. \\  \\ 6.8 Odds and ends. \\  \\
chara/operating_procedures.txt · Last modified: 2023/09/01 02:50 by gail_stargazer

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