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chara:operating_procedures [2023/02/08 19:18] charaobs |
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- | __**SUPPLEMENTAL INFORMATION**__ \\ | + | __**SUPPLEMENTAL INFORMATION**__ |
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+ | [[: | ||
[[: | [[: | ||
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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 | + | 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 |
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 | + | 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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3.9. Beacon Alignments | 3.9. Beacon Alignments | ||
- | The beacons wil<font 14px/ | + | The beacons wil<font 14px/ |
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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In the WFS GUI or obsgtk, turn the cooler on (COOL ON) and open the camera shutter (SOPEN) or SHUTTER (OPEN/ | In the WFS GUI or obsgtk, turn the cooler on (COOL ON) and open the camera shutter (SOPEN) or SHUTTER (OPEN/ | ||
+ | |||
+ | **NOTE: | ||
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. |
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 | + | About 20 minutes after the sun has set, it is dark enough to slew to your first target |
5.3 Check the OPLE carts \\ \\ | 5.3 Check the OPLE carts \\ \\ | ||
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When the telescope slew finishes, check the SPY 1 to make sure that the domes are aligned with the telescope if no star shows up in the ACQ or Finder cameras. If the star is not in the ACQ window, go to the FIND window and do the same, then return to the ACQ window and repeat. | When the telescope slew finishes, check the SPY 1 to make sure that the domes are aligned with the telescope if no star shows up in the ACQ or Finder cameras. If the star is not in the ACQ window, go to the FIND window and do the same, then return to the ACQ window and repeat. | ||
- | Locking Tiptilt using the telescope WFS | + | **NOTE: |
+ | |||
+ | 5.6 Locking Tiptilt using the telescope WFS | ||
+ | |||
+ | See [[: | ||
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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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 | + | Special additional alignments when IR flux is low - SEE NEW IR ALIGNMENT PROCEDURES INSTEAD OF DOING THIS |
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. | 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. | ||
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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. | 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. | ||
- | 5.6 Locking Lab Tiptilt (only used in special cases) | + | 5.7 Locking Lab Tiptilt (only used in special cases) |
+ | |||
+ | See [[: | ||
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 " | + | 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 " |
+ | |||
+ | 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. \\ \\ |