NSLS-II Seminar

"Megapixels per hour: Ultrafast X-ray Fluorescence Microscopy at the Australian Synchrotron"

Presented by David Paterson, Austrailian Light Source, Austraila

Wednesday, March 24, 2010, 1:00 pm — Large Seminar Room, Bldg. 703

A hard x-ray micro-nanoprobe [1] has been constructed at the Australian Synchrotron to provide versatile X-ray fluorescence microscopy across an incident energy range from 4 to25 keV. Two X-ray probes are used to collect µ-XRF and µ-XANES for elemental and chemical microanalysis: a Kirkpatrick-Baez mirror microprobe for micron resolution studies; and a Fresnel zone plate nanoprobe with laser interferometer encoding of sample position and capable of 60 nm resolution. Some unique aspects of the XFM beamline design, including a horizontal bounce DCM, and some lessons learned will be discussed.

The beamline is commissioning an advanced energy dispersive x-ray fluorescence detection scheme named Maia developed by BNL [2] and CSIRO Australia [3]. The Maia detector employs an annular geometry of 384-element planar silicon array to create a large acceptance solid-angle and handle count rates greater than 107/s. On-the-fly scanning combined with event mode data acquisition enables sub-ms per virtual pixel dwell with real-time elemental deconvolution and image projection. A 96-element Maia prototype used on the KB mirror microprobe has created high definition elemental maps with over 100 megapixels on a range of geological, materials and biological samples in practical time frames. Ultrafast X-ray fluorescence acquisition realises high definition elemental mapping, and creates the opportunity for fluorescence tomography and XANES imaging within practical time frames.

Hosted by: Andy Broadbent

More Information

6302  |  INT/EXT  |  Events Calendar

 

Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.