1. NSLS-II Seminar

    "Developing Tomography as a Standard Technique at the APS XRF Microprobe"

    Sophie Charlotte Gleber, Advanced Photon Source (A, Argonne National Laboratory

    Monday, March 11, 2013, 3 pm
    Seminar Room, Bldg. 725

    Hosted by: Sebastian Kalbfleisch

    Abstract: After the first proof-of-principle x-ray fluorescence tomography experiment at the XRF scanning microprobe 2-ID-E at APS [M. de Jonge and S. Vogt, 2010] it was clear that this technique had great potential but not the instrumentation needed for further applications, especially in terms of user and beamline scientist friendliness. Thus, we replaced the previous tomography setup with a new, robust stack of rotation and linear stages and implemented it permanently to a redesigned sample box. Furthermore, for data acquisition in a reasonable time frame we passed previous limits for a continuous scanning more ("fly scan") and solved data handling issues which came up for this fast scanning technique. Now we are offering XRF tomography as a standard technique to our users and have unique results in geological, biological and environmental applications. As our setup is under ambient conditions, we were even able to collect the first XRF tomography data set on aqueous samples [Gleber et al, accepted]. Both the instrumentation development as well as several results will be presented and discussed with respect to their tricks and challenges.