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chara:files:mircx_alignlab [2018/04/11 18:08] 127.0.0.1 external edit |
chara:files:mircx_alignlab [2020/07/10 15:42] gail_stargazer |
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- | -------------------------------------------------------------------------------- | + | ====== Lab Alignment ====== |
- | | + | |
- | | | __ _| |__ / \| |(_) __ _ _ __ _ _ __ ___ _ __ | |_ | + | |
- | | | / _` | '_ \ | /_\ | || |/ _` | '_ \| '_\/_ |/ _ \| '_ \| __| | + | |
- | | |__ | (_| | |_) | | | | | || | ( | | | | | | \/| | __/| | | | |_ | + | |
- | |____| \__, | + | |
- | |___/ | + | |
- | 1. After the daytime staff have aligned the vis/IR dichroics and IR Mirrors to the MIRCx table, | + | **NOTE:** These instructions |
- | you can begin the lab alignment of MIRCx. | + | |
- | or whenever one of the MIRCx pickoff mirrors | + | |
- | Make sure the CHARA corner cubes are in all of the beams. | + | |
- | 2. Confirm that the MIRCx pickoff mirrors are on the kinematic mounts. | + | 1. After the daytime staff have aligned the vis/IR dichroics and IR Mirrors to the MIRCx table, you can begin the lab alignment of MIRCx. This should be done at the start of a MIRCx run or whenever one of the MIRCx pickoff mirrors are taken out of the beam. Make sure the CHARA corner cubes are in all of the beams. |
- | the IR alignment target on the edge of the MIRCx table is out of the beam. | + | |
- | Take off the lens cover on the MIRCx camera. | + | 2. Confirm that the MIRCx pickoff mirrors are on the kinematic mounts. Also make sure that the IR alignment target on the edge of the MIRCx table is out of the beam. Take off the lens cover on the MIRCx camera. |
3. Turn on the white light source (POS 4). | 3. Turn on the white light source (POS 4). | ||
- | 4. Follow the instructions in the MIRCx User Manual to start the mircx server and open | + | 4. Follow the instructions in the MIRCx User Manual to start the mircx server and open the GUIs for mircx_ircam, |
- | the GUIs for mircx_ircam, | + | |
+ | 5. Follow the instructions in the MIRCx User Manual to start the camera (Gain 5), take backgrounds, | ||
- | 5. Follow the instructions in the MIRCx User Manual to start the camera (Gain 5), take backgrounds, | + | 6. Open B1-6, IR1-6, and WL shutters. Select visbeams 1&2, 3&4, or 5&6. |
- | | + | |
- | 6. Open B1-6, IR1-6, and WL shutters. Select visbeams | + | 7. On Fiber Explorer, go to the "Fiber Mapping" |
- | 7. On Fiber Explorer, go to the "Fiber Mapping" | + | If you find the light on one or more beams, then click " |
- | light source, set num_steps = 15 and XY step = 8 um. | + | |
- | the two visbeams | + | |
- | to begin the fiber explorer | + | |
- | If you find the light on one or more beams, then click " | + | If you do not find the light, |
- | for the beams that have light. | + | |
- | after moving the fiber - the 8 um step size is not too sensitive for proper centering. | + | |
- | After moving the fibers, do a finer search using num_steps | + | |
- | | + | |
- | If you do not find the light, you might want to use a larger number of steps (like ~ 25 or so). | + | If you see light on the detector while searching, but not in the fiber maps, then this means that the xchan positions are not set correctly. Try closing all but one shutter and search for light on only one beam at a time using the " |
- | + | ||
- | If you see light on the detector while searching, but not in the fiber maps, then this means that | + | |
- | the xchan positions are not set correctly. | + | |
- | only one beam at a time using the " | + | |
- | than the xchan quadrant. | + | |
- | location from the cross section profile (change column numbers to zoom in). Update the xchan | + | |
- | positions (all beams should be shifted by same amount) using the MIRCx parameters gui (remember | + | |
- | to Click "Send Values to RT") and then click "Load xchan pos from mirkwood" | + | |
- | Fiber Explorer. | + | |
- | Also try looking for light on a different visbeams pair, just to confirm whether there | + | Also try looking for light on a different visbeams pair, just to confirm whether there is light coming through at all. If not you don't see light on any beam, then check to make sure all the shutters are open and do a visual check in the lab to make sure corner cubes are in and no targets are blocking the beam path. |
- | is light coming through at all. If not you don't see light on any beam, then check to make sure | + | |
- | all the shutters are open and do a visual check in the lab to make sure corner cubes are in and | + | |
- | no targets are blocking the beam path. | + | |
- | If you do not find light on a particular beam (but confirm that light is getting though to | + | If you do not find light on a particular beam (but confirm that light is getting though to the other beams), you can try searching the entire range of the fiber mount. To do this, go to the Luminos Stage tab on Fiber Explorer. Select the relevant beam from the pull down menu. Write down the current x, y, z positions. Set the x,y position to the center of the range (64,000, 64,000) and click "Move to" button (full range goes from 0 to 128,000). Do not change the Z focus position. Then go to the Fiber Mapping tab and set the search range to the full range to num_steps = 64 at 8 micron step sizes. This search will take a very long time. If there is still no light, then a careful check has to be done by eye using the laser on the MIRCx table - EXPERTS ONLY - do not move any optics if you are not certain what they do. Contact the MIRCx team for advice. |
- | the other beams), you can try searching the entire range of the fiber mount. | + | |
- | To do this, go to the Luminos Stage tab on Fiber Explorer. | + | |
- | from the pull down menu. Write down the current x, y, z positions. | + | |
- | the center of the range (64,000, 64,000) and click "Move to" button (full range goes from | + | |
- | 0 to 128, | + | |
- | set the search range to the full range to num_steps = 64 at 8 micron step sizes. | + | |
- | search will take a very long time. If there is still no light, then a careful check has | + | |
- | to be done by eye using the laser on the MIRCx table - EXPERTS ONLY - do not move any optics | + | |
- | if you are not certain what they do. Contact the MIRCx team for advice. | + | |
- | 8. The last step is to record the counts ("Get Intensity" | + | 8. The last step is to record the counts ("Get Intensity" |
- | approximate ratio between data section and xchan section for each beam one at a time. | + | |
- | The current ratios for xchan/data are 2-3 (rows 15 and 45 in cross-section view). | + | |
- | Check to make sure the fringe data light and the xchan light show up in the default | + | |
- | quadrants. | + | |
- | pixels in the quadrant view mode), then the output stages might need to be adjusted - | + | |
- | please talk with a MIRCx EXPERT before making any adjustments. | + | |
- | -------------------------------------------------------------------------------- | ||