Blog posts

Holiday post: Ultra-SAXS version 2 drawing

2015/07/28 // 0 Comments

Side view of Ultra-SAXS instrument version 2. Click to enlarge. I am on holiday at the moment, so the blog posts will be a little bit more brief than usual. However, not less exciting! Over the last two weeks, I put together a side view assembly drawing of the latest version of the Ultra-SAXS machine. blue-tinted components are custom metal parts (mostly leftovers from version 1). Reddish parts are 3D-printed components, and white parts are commercial off-the-shelf (COTS) components. The drawing has been made largely by assembling component drawings made by my father for version 1, and technical drawings from the manufacturers of the COTS components. The full drawing, 3D printer files and other documents are available in a Git repository here (CC-BY licensed). It is mostly complete, but there may be a few items still [...]

A moment of stress

2015/07/21 // 0 Comments

A quick update on the goings on over here: The move is in full swing at the moment, with the boxes having just been moved out. Work-wise, there is a farewell presentation to finish and another beamtime (for which there is perhaps precious little time left). Fortunately, the previous beamtime with Andrew Jackson turned out alright, with the data corrections done at the end of the beamtime. In the end, a simple script was made that could be used to match a background to a particular measurement, and it looked like Andrew and colleagues managed to find examples of what they were looking for. Despite the stress, we are very much looking forward to the next few weeks. Changing times are always exciting, and we will see what happens — for better or worse — on the other [...]

Preparing for remote beamtime: More diamonds

2015/07/14 // 0 Comments

Last year, I spent time (remote-) managing data corrections from Japan as the data came in at the Diamond I22 beamtime. Two more beamtime events are now upon us, same beamline, different samples. So what could be done to prepare for this? This post is open to read and review on The [...]

SAS Abstracts: about blogs, the future and Ultra-SAXS

2015/07/07 // 0 Comments

With the SAS conference approaching (have you registered yet?), many of us are looking forward to the excellent talks, posters and coffee sessions (a terribly important, but often overlooked aspect of conferences). I submitted a few abstracts for talks, which have been converted to posters instead (TODO: make three [...]

Ultra-SAXS on powders: pow(d)er to the people!

2015/06/30 // 0 Comments

After the imminent move, “my” instrument will become unavailable again (it cannot travel with me). That means that now is the only time available to get at least some data out of the instrument. So how far did we get since the previous [...]

SAS measurement management concept.

2015/06/23 // 0 Comments

As we come up with ever more complicated ways of performing measurements, keeping track of all your measurements, their corrections and analyses is going to be tough. At the moment, I am thinking about how to do this for the upcoming beamtime and at my new position. The result shows signs of a database system [...]

Nomadic small-angle scatterers: a moving tale

2015/06/16 // 12 Comments

It has been over five years since we set foot in Japan, and what an interesting time it has been!. We decided, however, that it is high time to try another country. We will be moving to Berlin, where I will take up a position at the Bundesanstalt fur Materialforschung und [...]

Investigations: the case of the incorrect transmission factors

2015/06/02 // 0 Comments

During the CanSAS meeting, a few comments pointed to the correct definition of transmission factor: “The ratio of the transmitted beam, plus the scattered and diffracted radiation, to the incident beam”. For SAXS experiments (but not Ultra-SAXS), we usually smile at that italicized part and wave it off as a small effect. But we may get ourselves into trouble with strongly scattering [...]
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