Feature requests for the analysis pipeline

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Benjamin Frandsen

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Oct 25, 2017, 8:16:00 PM10/25/17
to xpd-users
I just completed an experiment at XPD, and I really enjoyed the new analysis pipeline! Thank you for putting this together! Just a few feature requests that would have made it even more useful for me, and hopefully other experimenters as well:

1. It is very important to display F(Q) to larger values of Q than the default 23 A^-1, since we need to determine the total exposure time necessary to reach a desired Qmax (e.g., 25 A^-1). For this reason, it would be great if the default Qmax were 30 A^-1, or if there were an easy way to change the range.

2. It would be nice if there were a toggle button to switch the display of the 2D diffraction image from log scale to linear scale, or generally have more flexibility in the display contrast.

3. The dynamic auto-masking feature is very impressive, but sometimes time-consuming and unnecessary for strongly scattering samples. It would be nice if there were an easy option to turn this off for the analysis pipeline.

4. Automatically evaluating the darks to ensure they are "good" and rejecting any that are bad would be extremely helpful. For example, if a dark is taken right after a strongly scattering sample, it will contain a weak diffraction pattern from the previous sample, which will of course interfere with subsequent images processed using that dark. It would be great if this could be avoided automatically by the software.

Simon Billinge

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Oct 26, 2017, 6:59:57 AM10/26/17
to Benjamin Frandsen, xpd-users
Thanks so much for this Ben.  We will scrape this and create bug fix/feature requests for future releases.

I think you also mentioned to me that you would like a workflow available as an option where for a series of samples the pipeline creates a single mask automatically, but applies the same mask to the whole series.  I am just noting this here so we can capture this request too.  This is related to #3 but I thought it was a sufficiently different UC that it is worth capturing.

BTW everyone, it is important to remember that the corrections that are done in the pipeline don't affect your raw data, so it is always possible to go back to the raw data and to apply a different mask or different dark subtractions or whatever you want if the pipeline doesn't get it right first time.  This is just a security blanket you have....we will try and make it so the pipeline helps you get the best data you can as quickly as you can, but if it doesn't for some reason, don't worry, everything is not ruined!

S

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Christopher Wright

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Oct 26, 2017, 9:23:01 AM10/26/17
to Simon Billinge, Benjamin Frandsen, xpd-users

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