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CHARA Array Operating Procedures\\ | CHARA Array Operating Procedures\\ | ||
- | Copyright © 2005-2018 The CHARA Team\\ | + | Copyright © 2005-2019 The CHARA Team\\ |
Last updated: 2018-01-11\\ | Last updated: 2018-01-11\\ | ||
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- | **Chapter 1:** === = Lab Protocol | + | **Chapter 1: ** Lab Protocol \\ |
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- | Picture_28.png Picture_29.png === 1.1 Lab Rules Intro ===\\ | + | 1.1 Lab Rules Intro \\ |
- | The CHARA optics lab is a building within a building and is intended to provide thermal and vibrational stability. The main goal of the CHARA lab rules is to keep all optics and equipment safe from any hazards. The crucial issue being misalignment of anything. The amount of dust and dander must be kept to a minimum. | + | The CHARA optics lab is a building within a building and is intended to provide thermal and vibrational stability. The main goal of the CHARA lab rules is to keep all optics and equipment safe from any hazards. The crucial issue being misalignment of anything. The amount of dust and dander must be kept to a minimum. |
- | 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. | + | |
+ | 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. | ||
+ | |||
+ | 1.3 General Lab Rules\\ | ||
Please remember that:\\ | Please remember that:\\ | ||
Procedures in the lab must be followed closely and failure to follow these rules will result in loss of lab privileges.\\ | Procedures in the lab must be followed closely and failure to follow these rules will result in loss of lab privileges.\\ | ||
- | * Before entering the lab, you must have a reason or tasks at hand. * Lab booties/ | + | * Before entering the lab, you must have a reason or tasks at hand. |
+ | |||
+ | * Lab booties/ | ||
[[: | [[: | ||
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- | **Chapter 2:** Version 2. August 27, 2012 by Judit, Version 3 January 2015 by Norm, Version | + | **Chapter 2:** Version 2. |
- | These are routine tasks to be performed in and around the lab every evening to prepare the array for regular observations. | + | |
- | Go into building, | + | August 27, 2012 by Judit, Version 3 January 2015 by Norm, Version |
+ | |||
+ | Preparations in the Lab Prior to Observing\\ | ||
+ | These are routine tasks to be performed in and around the lab every evening to prepare the array for regular observations. | ||
+ | |||
+ | 2.1 Starting the vacuum pump for the light pipes | ||
+ | |||
+ | Go into vacuum pump shack. Flip on power switch for pump (wait for blower to go on) | ||
+ | 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 valve a little, then come back to open fully. When all lines to be used are well below 100 torr, open all those valves. The final pressure should be 0.5 - 1.0 Torr in each line. The pump will normally bring all 6 lines down to .2-.3 Torr. The S1 and S2 lines leak the most during the day and will read the highest in the afternoon when you return, usually around 10 and 20 Torr. 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 the highest ones down first as stated above. | ||
+ | |||
+ | 2.2 Filling IR cameras with LN2\\ | ||
Fill both chambers on the NIRO camera. Use the gloves and glasses provided on the shelf with the funnels and the thermos. It will normally take 1 liter of LN2 in the outer chamber and 1/2 liter in the inner chamber. Fill it until the LN2 bubbles out of the top. This camera is normally kept cool all the time, exceptions will be noted.\\ | Fill both chambers on the NIRO camera. Use the gloves and glasses provided on the shelf with the funnels and the thermos. It will normally take 1 liter of LN2 in the outer chamber and 1/2 liter in the inner chamber. Fill it until the LN2 bubbles out of the top. This camera is normally kept cool all the time, exceptions will be noted.\\ | ||
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- | Fill the other dewars ONLY if you were specifically asked to do so. Other IR cameras: JouFLU and Cali (the blue dewar on the JouFLU table).\\ | + | Record that you filled the camera |
- | \\ | + | |
- | Record that you filled the cameras | + | 2.3 Alignment of the light path to the telescopes\\ |
Go into the lab. The green alignment laser on the light source table is used. To open necessary guis, use laptops or the two tablets inside lab. Tablets are the newest hand held units and are located on the west and south walls plugged into chargers.\\ | Go into the lab. The green alignment laser on the light source table is used. To open necessary guis, use laptops or the two tablets inside lab. Tablets are the newest hand held units and are located on the west and south walls plugged into chargers.\\ | ||
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- | 2.3.1 In the lab (Beam Combination area) * Turn on power switch for alignment laser, and turn the key. * Above the tiptilt camera, turn on the Pico 3 controller.\\ | + | 2.3.1 In the lab (Beam Combination area) Turn on power switch for alignment laser, and turn the key. Above the tiptilt camera, turn on the Pico 3 controller. |
- | 2.3.2 Check the laser spots on the E table (at North wall of Beam Switching area) * on Laser Filter gui, select ND 0.0 * make sure VEGA periscope is UP * open LASER shutter on the SHUTTERS gui and open shutters for the beams you are going to use * using the VISBEAMS gui, move the laser to the first beam pair you will check, ie. Beams 1& | + | |
- | If the telescopes were used on the same beam on the previous night, the next steps may be very close and not need much if any adjustment.\\ | + | 2.3.2 Laser alignment to east table |
+ | |||
+ | Check the laser spots on the E table target | ||
+ | If the telescopes were used on the same beam on the previous night, the next steps may be very close and should | ||
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- | 2.3.3 Next check the dichroic | + | 2.3.3 dichroic |
- | 2.3.4 Check the spot on the rail target | + | |
- | 2.3.5 The periscope covers | + | NOTE: As of 2017Jul 05, please align the dichroics following the instructions in {{: |
+ | |||
+ | \\ | ||
+ | 2.3.4 Checking | ||
+ | |||
+ | Put the rail target onto delay lines (toward back of the room from home sensor) | ||
+ | |||
+ | 2.3.5 IR alignments | ||
+ | \\ | ||
+ | 2.3.6 M10 Alignment | ||
+ | |||
+ | Go to a computer anywhere to check the beam remotely at the telescopes. | ||
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- | 2.3.6 M10 Alignment: | ||
- | Go to a computer anywhere to check the beam remotely at the telescopes. * look at Vacuum Monitor, check that the vacuum is below 20 torr * open telescope gui from pull down menu * click TV [ON] to open the camera window * click [M10AL] to change view to the M10 alignment view, click [M7 open] to open the M7 mirror cover * you want to center bright spot in beam on the black reference spot * may need to adjust the IRIS to see the bright spot well. [BEAM] cycles the iris from open to closed and gives a good idea of where the center of the spot is. * to adjust the position, use Pico 2 to select, for example, E2M10 → [MOVE] (use large steps ~ 100) * Note that the up, down, left, and right buttons do no correspond to the actual directions the spot will move * when the spot is centered, click [M7 close] to close the mirror cover * click TV [OFF] to close the window\\ | ||
2.3.7 Labao wfs camera covers and labao shutters\\ | 2.3.7 Labao wfs camera covers and labao shutters\\ | ||
- | The labao camera covers should be kept off, but put the covers on gently any time when you need to put the small corner cubes in place at the BRTs to work with the internal sources to protect the cameras.\\ | ||
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- | **Covers on** when doing the following alignment steps in the lab: * IR mirror check to CLIMB or MIRC with alignment laser * beam combiner alignments with white light source | + | **Put the Covers on** gently |
+ | |||
+ | **Covers off** after you remove | ||
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- | The labao cameras (just like the tiptilt camera) are safe during pop changes as long as you do not open any labao shutters. You will notice increased counts on the labao cameras (just like in the tiptilt camera) whenever ND=0 alignment laser is going through the system, but this is not harmful as long as the labao shutters are closed. While observing none of the labao shutters need to be or should be opened. As usual, dim the laser after you are done with the pop change to protect any camera in the lab from ghost reflections and scattered laser light. | + | The labao cameras (just like the tiptilt camera) are safe during pop changes as long as you do not open any labao shutters. You will notice increased counts on the labao cameras (just like in the tiptilt camera) whenever ND=0 alignment laser is going through the system, but this is not harmful as long as the labao shutters are closed. While observing none of the labao shutters need to be or should be opened. As usual, dim the laser after you are done with the pop change to protect any camera in the lab from ghost reflections and scattered laser light. |
+ | |||
+ | 2.4 Alignment of the IR light toward beam combiners | ||
The IR mirrors on the beam samplers can be adjusted using Pico 2 controller to targets depending on which IR beam combiner is to be used.\\ | The IR mirrors on the beam samplers can be adjusted using Pico 2 controller to targets depending on which IR beam combiner is to be used.\\ | ||
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For CLIMB 1 and CLIMB 2, the removable 6-beam target should be placed in the clamps on the CLIMB table. This also applies to aligning CLIMB for fringe tracking for VEGA or fringe finding for PAVO.\\ | For CLIMB 1 and CLIMB 2, the removable 6-beam target should be placed in the clamps on the CLIMB table. This also applies to aligning CLIMB for fringe tracking for VEGA or fringe finding for PAVO.\\ | ||
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- | For MIRC or JouFLU, the same target should be placed in the clamps on the MIRC table. * Place the target to the appropriate table, making sure it seats firmly in the clamps. * Place the small corner cubes (labeled) on their bases at the BRTs. Make sure they seat firmly and correctly. * Open IR shutters, send laser light using VISBEAMS gui to the position you want to check. * Use a tablet to bring up Pico 2 gui. Click on icon or in xterm type: xpico2 * Select the appropriate IR mirror for the beam you are about to adjust. For ex: S1IR. The Beam Sampler gui tells you which telescope is in the beam you are aligning. * When done for all telescope to be used, remove target and place it above the CLASSIC/ | + | For MIRCX, the same target should be placed in the clamps on the MIRCX table. * Place the target to the appropriate table, making sure it seats firmly in the clamps. * Place the small corner cubes (labeled) on their bases at the BRTs. Make sure they seat firmly and correctly. * Open IR shutters, send laser light using VISBEAMS gui to the position you want to check. * Use a tablet to bring up Pico 2 gui. Click on icon or in xterm type: xpico2 * Select the appropriate IR mirror for the beam you are about to adjust. For ex: S1IR. The Beam Sampler gui tells you which telescope is in the beam you are aligning. * When done for all telescope to be used, remove target and place it above the CLASSIC/ |
- | Go to OPLE racks * turn on OPLE Power on top unit (top of left most rack) This is the VME. * then turn on power for surge protector (bottom of left most rack) * turn on power for amplifiers for cart movement and cable pullers and once the central red light on the VME rack goes out, turn on the Burleigh amplifiers for telescopes that will be used.\\ | + | |
- | On computer outside lab, bring up Primary Ople Server | + | 2.5 Starting up OPLE and Metrology |
- | Go inside lab to check carts * from pull-down menu, under GTK, open Primary OPLE GUI * click on [STATUS] | + | |
- | Check delay line wires on carts, sure nothing is on tracks\\ | + | Go to OPLE racks and turn on OPLE Power on top unit (top of left most rack) This is the VME. Turn on power for surge protector (bottom of left most rack), turn on power for amplifiers for cart movement and cable pullers and once the central red light on the VME rack goes out, turn on the Burleigh amplifiers for telescopes that will be used.\\ |
+ | To test cart motions: | ||
+ | Check delay line wires on carts, | ||
+ | \\ | ||
+ | On the Metrology table inside the lab * Turn on two blue amplifiers for metrology laser (on button is labeled " | ||
+ | |||
+ | 2.6 Final steps in the lab | ||
+ | |||
+ | If using CLASSIC or CLIMB, turn on the black box above the NIRO computer, and then turn on the silver box below it on the same cart. Remove cover on camera. | ||
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- | On the Metrology table inside the lab * Turn on two blue amplifiers for metrology laser (on button is labeled " | + | **Chapter 3: ** |
- | Back To Main Menu **Chapter 3: ** (edited 2012Aug29 by Gail and Chris) | + | |
- | fig_monitors_new.jpg * Things should | + | (edited 2012Aug29 by Gail and Chris) |
+ | |||
+ | Setting up Computer in the Control Room | ||
+ | |||
+ | 3.1 General Overview of Control Room computer setup | ||
+ | |||
+ | There are six computer screens which are now horizontally arrayed. | ||
+ | |||
+ | 3.2 After aligning the lab, you can turn on the following from the POWER GUI: To change the setting on the power GUI, unclick LOCK, make change, re-click LOCK * Under Rack_2, turn on [METSCOPE] (button will turn green when ON) * If observing with CLASSIC, turn on [NIRO CPU] and [CLS-DITH] on Rack_2 * If observing with CLIMB, turn on [NIRO CPU] on Rack_2 and [CLM-DITH] on Rack_3 * Under LABPOW, turn on [T/T COMMS] This has been replaced by the Tiptilt Socket as of Fall 2014. If the socket fails, the serial comms can be used to establish the connection to tiptilt. * For each telescope being used, turn on [TIP/TILT]. [COMMS] has been replaced by Tiptilt Socket as well. === 3.3 Open servers required for observing === * Open servers from the pop up menu at bottom of screen 5, using the black platter icon. * The GPS server should always stay on and remain on screen 3 * The METROL Server also stays on in screen 3 * Close and re-open all Telescope servers after UT 0h in screen 3 (because of tiptilt connection issues) * Open Primary OPLE Server (Move to upper left of screen 6) * Open Classic, Climb1, or Climb2 if needed (Move to middle left of screen 6) * Open Tiptilt Server (Move to lower left of screen 6) * Open Metrology Monitor (METROL) gui, (upper right of screen 3), this gui usually remains open. * Open Metrology Laser (METLAS) gui, (upper right of screen 3), this gui usually remains open. === 3.4 Open Telescope GUIs from the menu === * Open needed Telescope guis, put on screen 5. All 6 scope guis can fit on one screen, but the TV windows will overlap slightly if all 6 are used for MIRC observing. * On the main tab for each telescope gui, click [ON] under Television to turn on the TV screen === 3.5 Open GUIs required for observing from the menu under GTK: === * Open Primary OPLE gui (move to right side of OPLE server) * Open Classic, Climb1, or Climb2 gui if needed (put on right side of server) * Open LDC1 and LDC2 if VEGA or PAVO programs are observing * Open Tiptilt GUI * This will bring up Tiptilt GUI and Tiptilt viewing screens for all telescopes * Move viewing screens near telescope TV screens === 3.6 Using the Cosmic Debris job sequencer ===\\ | ||
Open Cosmic Debris, CD for short, - Primary from the menu and move to screen 4 * On the CONFIGURE tab, check to make sure the PoPs and telescope beam assignments agree with the white board * If the POPs are wrong on CD, then open the " | Open Cosmic Debris, CD for short, - Primary from the menu and move to screen 4 * On the CONFIGURE tab, check to make sure the PoPs and telescope beam assignments agree with the white board * If the POPs are wrong on CD, then open the " | ||
Set the instrument and settings on Cosmic Debris * On the " | Set the instrument and settings on Cosmic Debris * On the " |