Speaker
Description
In this work, we present the use of PandABox timing
module to implement position-based and time-based on-
the-fly scanning to continuously acquire data at the X-ray
Absorption Fine Structure (XAFS) and X-ray Fluorescence
(XRF) beamline of SESAME synchrotron light source. For
position-based scanning, we first developed a module that
automatically partitions the user-defined energy and Bragg
angle ranges into sub-intervals. Within each sub-interval,
the energy-angle mapping is linearly approximated to main-
tain accuracy within acceptable margins. The method
then integrates the position encoding of the Double Crystal
Monochromator (DCM) Bragg angle with the synchronous
triggering of multiple detectors, including ionization cham-
bers (ICs) and a KETEK SSD detector. For time-based
scanning, PandABox is pre-configured to generate triggers
at fixed time exposure time intervals. Improvements, per-
formance and comparative results are also discussed in this
work.
Keywords: on-the-fly scanning, QEXAFS, DAQ, Pand-
ABox, linear fitting, XAFS/XRF
| Paper status | Proceeding files received |
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