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chara:operating_procedures [2021/11/04 17:01]
charaobs 		chara:operating_procedures [2021/11/04 17:15]
charaobs
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 Before entering the lab, you must have a reason or tasks at hand. Before entering the lab, you must have a reason or tasks at hand.
  
-Lab booties/shoe covers must be worn by all. Throw out booties that have holes in them. The traction tape on the steps are particularly rough on booties so examine them before and after using them. Proper clothing is also important. Loose hanging jackets or garments can snag on mirrors or other exposed equipment and are better left outside of the lab. Please be alert and move slowly and cautiously. When entering the lab make sure to walk across the sticky floor mat. If the mat isn’t sticky, remove the top layer. If this is close to the final layer please notify the staff. No more than three people are allowed in the lab at once unless it is 3 to 4 hours before observing time or there is some pressing need. Many bodies can create unwanted atmospheric effects. With too many people, it is too easy to bump into each other and the equipment. If you bump, hit, move or just tap anything in the slightest way, let us know. Never touch anything you have not been trained to use. If ever in any doubt, leave it alone and get someone who knows. Any unusual sounds, sights, movement of equipment, etc., should be noted. You must know the path of the laser beams, metrology or alignment. Stay out of their way especially right before observing. If you must go into the lab during this time don’t forget to put on IR-protective goggles. Access and use of the lab requires training. If a piece of equipment does not appear to be operating properly let us know immediately. Also if you are uncertain about a lab procedure or a step in the alignment sequence contact us before proceeding. When leaving the lab any time of the day, remember to turn off all lights (fluorescent and incandescent). Lights left on generate unnecessary heat in the lab.\\+Lab booties/shoe covers must be worn by all. Throw out booties that have holes in them. The traction tape on the steps are particularly rough on booties so examine them before and after using them. Proper clothing is also important. Loose hanging jackets or garments can snag on mirrors or other exposed equipment and are better left outside of the lab. Please be alert and move slowly and cautiously. When entering the lab make sure to walk across the sticky floor mat. If the mat isn’t sticky, remove the top layer. If this is close to the final layer please notify the staff. No more than three people are allowed in the lab at once unless it is 3 to 4 hours before observing time or there is some pressing need. Many bodies can create unwanted atmospheric effects. With too many people, it is too easy to bump into each other and the equipment. If you bump, hit, move or just tap anything in the slightest way, let us know. Never touch anything you have not been trained to use. If ever in any doubt, leave it alone and get someone who knows. Any unusual sound<font 14px/Arial,Helvetica,sans-serif;;inherit;;inherit>s, sights, movement of equipment, etc., should be noted. You must know the path of the laser beams, metrology or alignment. Stay out of their way especially r</font>ight before observing. If you must go into the lab during this time don’t forget to put on IR-protective goggles. Access and use of the lab requires training. If a piece of equipment does not appear to be operating properly let us know immediately. Also if you are uncertain about a lab procedure or a step in the alignment sequence contact us before proceeding. When leaving the lab any time of the day, remember to turn off all lights (fluorescent and incandescent). Lights left on generate unnecessary heat in the lab.\\
 [[:chara:operating_procedures|Back to Main Menu]]\\ [[:chara:operating_procedures|Back to Main Menu]]\\
 \\ \\
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 3.7 Turn on metrology laser and home the carts 3.7 Turn on metrology laser and home the carts
  
-<font 14px/Arial,Helvetica,sans-serif;;#333333;;white>Make sure that no one is in the lab. Turn the Laser on using the metrology laser</font>  GUI<font inherit/inherit;;initial;;inherit>. The [Laser Power] button will go from red to green. On the Metrology Monitor</font> GUI<font inherit/inherit;;initial;;inherit>, click [INITIALIZE] to initialize the metrology. A window will pop up to indicate a successful initialization. Hit [OK] on the window to close it. Select REFALL and the UNK signal for each cart being used. Hit “OK” to bring up plots. Click [CLEAR] on the metrology monitor to turn the unknown signals from red to white. The signals should look like nice sine waves. If they are too small in amplitude or erratic, a metrology alignment or self interference may be the reason. To close the metrology signal windows, click on [RUN MULTIPLE] again</font>  \\+<font 14px/Arial,Helvetica,sans-serif;;#333333;;white>Make sure that no one is in the lab. Turn the Laser on using the metrology laser</font>   GUI<font inherit/inherit;;initial;;inherit>. The [Laser Power] button will go from red to green. On the Metrology Monitor</font>GUI<font inherit/inherit;;initial;;inherit>, click [INITIALIZE] to initialize the metrology. A window will pop up to indicate a successful initialization. Hit [OK] on the window to close it. Select REFALL and the UNK signal for each cart being used. Hit “OK” to bring up plots. Click [CLEAR] on the metrology monitor to turn the unknown signals from red to white. The signals should look like nice sine waves. If they are too small in amplitude or erratic, a metrology alignment or self interference may be the reason. To close the metrology signal windows, click on [RUN MULTIPLE] again</font>\\
 \\ \\
-<font 14px/Arial,Helvetica,sans-serif;;initial;;white>Home each of the active carts. The carts must be homed before observing or else fringes will not be found. Do not forget this step or endless frustration will follow. At the start of the night the carts will usually be at the back of the rails with the back switch (BS) column marked with an “X” on the OPLE server. On the “Control” Tab on the OPLE</font>  GUI<font inherit/inherit;;initial;;inherit>, click [HOME] on each of the active carts. This will move the carts to the front of the rails where the home switch is located. If the carts do not appear to be moving after clicking “Home,” you can put IR laser googles on and go into lab to check them and listen if the carts are making loud grinding or squealing noises when they are trying to move. If they are, then the cart(s) may need to be inspected (serious problems with the carts need to be fixed by daytime staff).</font>+<font 14px/Arial,Helvetica,sans-serif;;initial;;white>Home each of the active carts. The carts must be homed before observing or else fringes will not be found. Do not forget this step or endless frustration will follow. At the start of the night the carts will usually be at the back of the rails with the back switch (BS) column marked with an “X” on the OPLE server. On the “Control” Tab on the OPLE</font>   GUI<font inherit/inherit;;initial;;inherit>, click [HOME] on each of the active carts. This will move the carts to the front of the rails where the home switch is located. If the carts do not appear to be moving after clicking “Home,” you can put IR laser googles on and go into lab to check them and listen if the carts are making loud grinding or squealing noises when they are trying to move. If they are, then the cart(s) may need to be inspected (serious problems with the carts need to be fixed by daytime staff).</font>
  
-<font 14px/Arial,Helvetica,sans-serif;;#333333;;white>After the carts finish homing, the ople server will say “HOMESETDONE” * To check that the carts have homed properly, click [TRACK] on the Control Tab of the OPLE</font>  GUI<font inherit/inherit;;initial;;inherit>* The cart will track to home switch at the target position of “0.000000” on the OPLE Server * Make sure the “X” lights up and stays steady under the HM column on the Primary OPLE Server for each cart you will be using. Also make sure that the errors between the laser and target position are small, (0.007µm or less is typical), when tracking at the home switch. If the errors jump when the cart is tracking on the home switch, then turn the cart [OFF], move the cart [BACK] about a meter from the home switch, turn the cart [OFF], and try clicking [TRACK] again. Please wait for each command to register on the OPLE server before clicking the next button in this sequence. If the errors do not stay near zero, the metrology laser may be out of alignment and the signal is low. Pull up a metrology signal window as shown above and confirm the signal is strong. It will look like a sine wave with an amplitude the same as the window height. If it is low, adjust it carefully with the MET2 gui in PICO 2. Get the sine wave to equal the window height. If it is ok and the problem persists, you can try to restart the respective cart’s computer/OPLE1-6 server(s). Try tracking the cart again. After checking to make sure the carts track properly, turn the carts [OFF]</font> .+<font 14px/Arial,Helvetica,sans-serif;;#333333;;white>After the carts finish homing, the ople server will say “HOMESETDONE” * To check that the carts have homed properly, click [TRACK] on the Control Tab of the OPLE</font>   GUI<font inherit/inherit;;initial;;inherit>* The cart will track to home switch at the target position of “0.000000” on the OPLE Server * Make sure the “X” lights up and stays steady under the HM column on the Primary OPLE Server for each cart you will be using. Also make sure that the errors between the laser and target position are small, (0.007µm or less is typical), when tracking at the home switch. If the errors jump when the cart is tracking on the home switch, then turn the cart [OFF], move the cart [BACK] about a meter from the home switch, turn the cart [OFF], and try clicking [TRACK] again. Please wait for each command to register on the OPLE server before clicking the next button in this sequence. If the errors do not stay near zero, the metrology laser may be out of alignment and the signal is low. Pull up a metrology signal window as shown above and confirm the signal is strong. It will look like a sine wave with an amplitude the same as the window height. If it is low, adjust it carefully with the MET2 gui in PICO 2. Get the sine wave to equal the window height. If it is ok and the problem persists, you can try to restart the respective cart’s computer/OPLE1-6 server(s). Try tracking the cart again. After checking to make sure the carts track properly, turn the carts [OFF]</font>.
  
 3.8 Synchronizing the clocks 3.8 Synchronizing the clocks
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 See the instruments page for information about starting different instruments at the beginning of the night:\\ See the instruments page for information about starting different instruments at the beginning of the night:\\
-[[:chara:instruments|Instruments: CLASSIC, CLIMB, MIRC, PAVO, VEGA, FLUOR]]\\+[[:chara:instruments|Instruments: CLASSIC, CLIMB, MIRC-X/MYSTIC, PAVO]]\\
 \\ \\
 [[:chara:operating_procedures|Back to Main Menu]]\\ [[:chara:operating_procedures|Back to Main Menu]]\\
chara/operating_procedures.txt · Last modified: 2023/09/01 02:50 by gail_stargazer

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