chara:operating_procedures
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| CHARA Array Operating Procedures\\ | CHARA Array Operating Procedures\\ | ||
| Copyright © 2005-2019 The CHARA Team\\ | Copyright © 2005-2019 The CHARA Team\\ | ||
| - | Last updated: | + | Last updated: |
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| - | **Chapter 1: ** Lab Protocol \\ | + | **Chapter 1: ** Lab Protocol\\ |
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| - | 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. | ||
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| - | **Chapter 2:** Version 2. | + | **Chapter 2:** |
| - | August | + | 27 AUG 2012 by Judit, |
| Preparations in the Lab Prior to Observing\\ | 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. | + | These are routine tasks to be performed in and around the lab every evening to prepare the array for regular observations. Note that there is a new alignment protocol for configurations that do not change night to night. Use it instead of the full alignment given here. |
| 2.1 Starting the vacuum pump for the light pipes | 2.1 Starting the vacuum pump for the light pipes | ||
| - | Go into vacuum pump shack. | + | Go into vacuum pump shack. Flip on power switch for pump (wait for blower to go on) Open valve slowly (parallel to pipe means open) Note if fan cords are plugged into wall outlet to keep pumps cool. Note oil temperature when you start up. Oil temps below 20º C make for a labored start. Inform Larry if the oil temp is low and the heater 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 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. | 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. | ||
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| 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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| - | Record that you filled the camera in the log book, noting time and camera filled. Note also the vacuum measurement for the MIRCX camera. | + | Record that you filled the camera in the log book, noting time and camera filled. Note also the vacuum measurement for the MIRCX camera. If you do not observe due to weather, fire or closure, make sure someone on the mountain will fill it for you. |
| 2.3 Alignment of the light path to the telescopes\\ | 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 Laser alignment to east table | 2.3.2 Laser alignment to east table | ||
| - | Check the laser spots on the E table target 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& | + | Check the laser spots on the E table target 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&2. Using the Beam Samplers gui, move beam samplers off of the beams you will align. Check each spot that is going to be used on each pair (for ex. 1&2, 2&3, 3&4, etc.) Use Pico3 gui to center laser dots on cross hairs. Be mindful of which pair was selected with VISBEAMS. (1&2-2 and 2&3-2 appear at the same spot, but different pieces of optics are involved) Use the Beam Samplers gui to put telescopes back on the appropriate beams. Note that when multiple telescope/ |
| If the telescopes were used on the same beam on the previous night, the next steps may be very close and should not need much if any adjustment.\\ | If the telescopes were used on the same beam on the previous night, the next steps may be very close and should not need much if any adjustment.\\ | ||
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| 2.3.4 Checking the alignment to the rail target | 2.3.4 Checking the alignment to the rail target | ||
| - | Put the rail target onto delay lines (toward back of the room from home sensor) | + | Put the rail target onto delay lines (toward back of the room from home sensor) Make sure carts are at back of the rails. Check spot on back side of target. If alignment is bad at the back, follow instructions for BRT adjustments. (Printed sheet on metrology table) |
| - | 2.3.5 IR alignments are below in 2.4\\ | + | 2.3.5 IR alignments are below in 2.4\\ |
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| 2.3.6 M10 Alignment | 2.3.6 M10 Alignment | ||
| - | Go to a computer anywhere to check the beam remotely at the telescopes. | + | Go to a computer anywhere to check the beam remotely at the telescopes. Check Vacuum Monitor that the vacuum is below 20 torr. Open telescope gui from pull down menu. Click TV [ON] to open the camera window and click [M10AL] to change view to the M10 alignment view, click [M7 open] to open the M7 mirror cover. Center bright spot in beam on the black reference spot. You may need to adjust the IRIS or the TV brightness 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 |
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| 2.3.7 Labao wfs camera covers and labao shutters\\ | 2.3.7 Labao wfs camera covers and labao shutters\\ | ||
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| - | **Put the Covers on** gently when doing the following alignment steps in the lab: IR mirror check to CLIMB or MIRC with alignment laser or beam combiner alignments with white light source or tiptilt Zabers alignment with alignment laser. | + | **Put the Covers on** gently when doing the following alignment steps in the lab: IR mirror check to CLIMB or MIRC with alignment laser or beam combiner alignments with white light source or tiptilt Zabers alignment with alignment laser. |
| **Covers off** after you remove the corner cubes from their bases.\\ | **Covers off** after you remove the corner cubes from their bases.\\ | ||
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| 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.\\ | 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: On computer outside lab, bring up Primary Ople Server, type in " | + | To test cart motions: On computer outside lab, bring up Primary Ople Server, type in " |
| Check delay line wires on carts, make sure nothing is on tracks\\ | Check delay line wires on carts, make sure nothing is on tracks\\ | ||
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| 2.6 Final steps in the lab | 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. | + | 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. After lab is completely setup, you need to take off tiptilt cover if using lab tiptilt, but do so with only the dim lights on and the laser shutter closed so as not to blast CCD with light. |
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| **Chapter 3: ** | **Chapter 3: ** | ||
| - | (edited 2012Aug29 | + | 17 DEC 2019 by Norm |
| Setting up Computer in the Control Room | Setting up Computer in the Control Room | ||
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| 3.1 General Overview of Control Room computer setup | 3.1 General Overview of Control Room computer setup | ||
| - | There are six computer screens which are now horizontally arrayed. | + | There are six computer screens which are now horizontally arrayed. Window layouts can be saved and reloaded to suit each operator. Use the third icon from the left in the toolbar |
| - | 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 | + | 3.2 Setting up for observing |
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| + | Turn on the following from the POWER GUI: To change the setting on the power GUI, unclick LOCK, make change, re-click LOCK. | ||
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| + | 3.3 Servers | ||
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| + | Servers can be opened | ||
| 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 " | ||
chara/operating_procedures.txt · Last modified: 2023/09/01 02:50 by gail_stargazer
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