Looking At Nothing

Introspection

2014-03-31 Brian 0

I’ve been working on a lot of things of late, but none are yet in a state to show here yet. However, when talking to […]

A measured, corrected and integrated curve (blue) from a GC calibration sample compared to its calibrated data (green)

Does it matter part 4.2: The actual flatfield

2014-03-24 Brian 2

Last week, I talked about how to determine whether a flatfield correction was necessary. Data from a Bruker Hi-Star detector was shown to have very […]

Detector deviation from the azimuthal mean; a first approximation at obtaining a flatfield image. Color scale clipped to -0.5, 0.5 (-50% and 50% deviation, respectively).

Does it matter part 4: flatfield correction on a Bruker HiStar wire detector

2014-03-17 Brian 2

See the previous posts in this series here: Part 1, Part 2 and Part 3 Very recently, Bruker upgraded their SAXS instrument in our building. […]

Schematic overview of the considerations of the fancy background subtraction.

Fancy background subtraction: an initial look

2014-03-10 Brian 1

As indicated last week, some spare time has been spent trying to re-derive a correction for separating sample container scattering from the sample itself. Normally, […]

Cutting-room clippings

2014-03-03 Brian 0

For today’s post, I had a few things planned, but haven’t been able to work anything out yet. So I’ll talk a little about these […]

Data correction and reduction code functional

2014-02-24 Brian 0

Before I get started, let me just highlight the new small-angle scattering issue of J. Appl. Cryst. which has come out a few days ago. […]

The error bar: summarising how good your SAXS is.

Speaking of errors: estimating uncertainties in integrated data (corrigendum to “Everything SAXS”)

2014-02-17 Brian 1

I feel I need to make a public apology: it turns out that I have been inaccurate in some of my recent papers on the […]

Internal detection surface diffraction effects leading to a reduction of detected counts (black lines on the real image, over which about 10% fewer counts were detected than the surrounding pixels). Image on the right shows the calculated pattern for the chosen energy. Energy used: 8285 eV, Reflection indices detected: (117). Image courtesy of Christian Gollwitzer at PTB.

Trouble in Paradise? Internal diffraction in PILATUS-like detectors

2014-02-10 Brian 0

A great many of the data correction issues in small-angle scattering can be resolved by trading a kidney for a PILATUS detector [1] (or similar […]

Monte Carlo Demonstration (video)

2014-02-03 Brian 0

Over the last year or so, I have spent quite some words on the Monte Carlo method for extracting (particle) size distributions from scattering data. […]

A screenshot from the Live Fourier Transform program

New Live Fourier Transform code

2014-01-27 Brian 0

More about this next week, but Ingo has kindly provided a Windows executable version of one of the latest development builds of the Monte Carlo code […]