Category Archives: Blog posts

Following quantum dot growth with McSAS

Thanks to Benjamin Abécassis (via Twitter), I got involved in an interesting project. Dr. Abécassis and coworkers had been doing in-situ measurements during synthesis of quantum dots, and were using McSAS to analyse their data. That allowed them to figure out what mechanistic models are unlikely to be valid for this synthesis and highlight one […]

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…And then the assembly

Today we had the new X-ray source arriving. It’s not working yet, but its imminent arrival spurred me into action to mount the Ultra-SAXS components in place and do some minor maintenance…

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Does it matter part 5.1: Detector linearity

Time for another short investigation into data corrections? Good. Let’s take a quick look at the linearity of our Bruker HiStar detector.

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canSAS-8 meeting announcement.

There is a very important meeting coming up soon for all those who dedicate themselves to excellence in small-angle scattering, and I for one, am very excited about this one. The canSAS-VIII meeting is full of interesting people giving interesting talks, complemented by plenty of (friendly) discussion sessions that are going to clarify the heading […]

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Calculating scattering by hand – example 1

Those who read the older SAXS literature will note liberal use of Fourier transforms to calculate the scattering behaviour of odd-shaped particles. Likewise, the effects of smearing due to (for example) beam shape (think “blurring” of the scattering pattern) can be easily determined using such transforms. It is useful to get a feel for the […]

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February roundup: BH rebuild progress, paper news.

The end of February is nigh (shockingly fast…), and so it is time for another round-up. This month, the following things piqued my interest:

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Why we never may be able to get a calibration curve: a matter of coherence

For years, we have been trying to compare scattering patterns from different instruments. While this leads to reasonable results, there are precious few cases of true agreement despite the focus on data corrections (one example of agreement: [0]). My guess: we have not been considering coherence in these comparisons. This paper is currently available for […]

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Radiation safety for lab X-ray sources

Over the years, I have followed several radiation safety courses in a variety of countries. Last week, it was NIMS’ turn to train me. As this was given in Japanese (a language I can only half follow), I decided to write my own section on radiation safety instead (for future inclusion in the book). This […]

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January roundup: Sour scientists, McSAS logo, CanSAS meeting

A few short stories for today, none of them really long enough to fill a blog post with, and therefore better combined for your enjoyment.

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Everything SAXS – book growth

Finally, I managed to get some time to work on the book again. When I last left it late December, the book structure and base was complete, but its content was missing. This is what I did so far:

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