Looking At Nothing

Looking At Nothing

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Articles by Brian Pauw

Front view of the Ultra-SAXS instrument components. Source on the left, followed by collimation, upstream and downstream rotations, and the detector on the right.

…And then the assembly

2015-03-24 Brian Pauw 1

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 […]

Generator current setting versus total detected countrates for three samples of glassy carbon.

Does it matter part 5.1: Detector linearity

2015-03-17 Brian Pauw 3

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

Combination found in Japan.

canSAS-8 meeting announcement.

2015-03-10 Brian Pauw 0

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 […]

Calculating scattering by hand – example 1

2015-03-03 Brian Pauw 0

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 […]

The upstream crystal rotation stage mounted on rail segments and a vertical jack. White parts are printed in ABS.

February roundup: BH rebuild progress, paper news.

2015-02-24 Brian Pauw 0

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:

A field of random size scatterers.

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

2015-02-17 Brian Pauw 9

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 […]

Spectrum of the X-rays emitted by an X-ray tube with a rhodium target, operated at 60 kV. The smooth, continuous curve is due to bremsstrahlung, and the spikes are characteristic K lines for rhodium atoms. High energy on the left (short wavelength), low energy on the right). Image CC0 licensed from http://en.wikipedia.org/wiki/File:TubeSpectrum.jpg

Radiation safety for lab X-ray sources

2015-02-10 Brian Pauw 1

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 […]

Logo of the McSAS program version 1.0

January roundup: Sour scientists, McSAS logo, CanSAS meeting

2015-02-03 Brian Pauw 1

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.

Everything SAXS – book growth

2015-01-27 Brian Pauw 1

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 […]

Dr. Helen E. Maynard-Casely chats about planets

2015-01-20 Brian Pauw 0

What to expect on the surfaces of the more distant planets is a hard question to answer. Fortunately, we have scientists working on this problem. […]

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