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| Title | Processing SPE Files from Princeton Instruments during Data Acquisition in LNLS | |||||
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| Abstract | The beamline of Dispersive X-ray Absorption Spectroscopy, DXAS, in LNLS uses a Princeton Instruments CCD, PyLoN, to acquire spectra of materials under analysis. Such camera produces an SPE binary file. Some Python scripts were developed to display absorbance and x-ray magnetic circular dichroism (XMCD) during the experiment. Firstly, using WinspecUtils.py* module we extract the data in a 2D array (intensities by pixels) from an SPE file of radiant flux received by a material (I0), then, while spectra of radiant flux transmitted by that material (I), is being acquired, their data are extracted from a temporary SPE file. With I and I0 we calculate absorbance (mu) = ln(I0/I) and plot it with matplotlib** of Python . For XMCD same data extraction is performed, but each cycle has eight spectra with magnet field varying its orientation: + - - + - + + -; and the calculation is XMCD = {AVG[mu(norm)(+)] - AVG[mu(norm)(-)]}. Calculated XMCD is also plot. So, with such information of absorbance and XMCD being displayed during the experiment the users could quickly act to fix any problem. | |||||
| Footnotes & References | * WinspecUtils.py module: version shared by Kasey Russell (krussell@post.harvard.edu), based on other version of James Battat (jbattat@post.harvard.edu) ** matplotlib: http://matplotlib.org |
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| Paper | download THPOPRPO11.PDF [0.529 MB / 2 pages] | |||||
| Poster | download THPOPRPO11_POSTER.PDF [0.489 MB] | |||||
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |||||
| Conference | PCaPAC2016, Campinas, Brazil | |||||
| Series | International Workshop on Personal Computers and Particle Accelerator Controls (11th) | |||||
| Proceedings | Link to full PCaPAC2016 Proccedings | |||||
| Session | Poster Session - Thursday | |||||
| Date | 27-Oct-16 13:30–15:30 | |||||
| Main Classification | Data Acquisition and Data Analysis | |||||
| Keywords | ion, experiment, controls, synchrotron, detector | |||||
| Publisher | JACoW, Geneva, Switzerland | |||||
| Editors | Volker RW Schaa (GSI, Darmstadt, Germany) | |||||
| ISBN | 978-3-95450-189-2 | |||||
| Published | September 2017 | |||||
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