This wiki page is a guide to use the Differential Image Motion Sensor Using Multiapertures (DIMSUM) instrumentation that was installed to Aux Tel between December 6th and 16th. I am currently writing this as a wiki page to be able to get feedback during the process of documentation. Once everything is finalized I can create a pdf file if requested.
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The SMA threads are 1/4-36. Digikey sells them, part number A104989-ND. Bought 100 of them.
Asked Helen to place this order since credit card failed.
Feb 14 2024 Pachon, Stubbs
Changed optical fiber configuration to have Xenon source feed attenuator module to 600- micron 1:4 fiber then 4 of 200 micron 1:4 bundles. This gives us 16 sources 200 microns in diameter.
I did find one fiber that was flopping/loose in the pegboard, that was presumably the one that showed anomalous behavior in analysis done Feb 2024 by Ali K.
Checked using headlamp that all fibers look comparable.
When running remotely on data collection using gphoto-2 to interrogate aperture worked fine, after power cycling the camera.
But the
./CommunicateTrial.sh
script failed.
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Also need to solve the fact that we aren't triggering the flash using our own scripts.
So I 'm going to take a stack of 10 images by hand starting at don't have the 1 inch ND filters here. Must have taken them back to Boston. Rigged up a Kapton tape attenuator.
Take image IMG_0028 at 1/10 sec and f/10.
Still saturated. Try f/20
image 0029 is better but still just barely saturated at cores of sources. Backed out the Xenon source fiber on attenutor to make focus worse. Try that with image 0030 at 1/10 and f/20
image 0030 is still saturated in core at f/20. Inserted a second kapton tape filter in second filter holder slider.
Try again, this is 0031
That's better. Tons of flux, tight PSF: