Hi Chang: If it is the right form, I have a Python program which will convert them along with a description of the file format. I have attached the description below and the python program to the email. If it does not get through the mailing list filter, just email me directly and I will send it. Carlo ------------------------------------------------------------------------ The first column is in motor steps (!), and the angle is a linear function of motor steps, and the rest is just Bragg's law. Things are referenced physically to the copper edge. Key parameters used in the data acquisition program are in the header: dspace is obvious, stepdeg is steps per degree in the mono, cuedge is the position of the Cu edge as measured in motor step units. I think the channel offsets (dark currents) are already subtracted from the other columns; the offsets are just listed for documentation. In addition, there are two different file types, the ones which have a header beginning with NPTS and containing DSPACE and the older files which begin with CUEDGE and do not contain d-spacing information. For the latter, we make the following assumptions: dSpacing = 1.92017 stepDegree = 2000 * int(edgeCu / 42000) The guts of the calculation are as follows: theta = ((steps - edgeCu) / stepDegree) * (pi / 180.) + thetaCu energy = hc / (2 * d * numpy.sin(theta)) where steps - the current step value in the original file edgeCu - the position of the Cu edge in steps stepDegree - the steps per degree theta thetaCu - the angle of the Cu edge (from d-spacing information) On Fri, 8 Dec 2017, woschangqiang@126.com wrote:
Hello, dear everyone. I downloaded a XAFS data about mettalic Ru from the website of ixs.iit.edu. There are 4 groups of information in the data, and each ranges between ~67800 with ~63000 in energy. So how to import the data to Athena, and how this kind of data was produced? Does anyone come across this situation? Thanks for your time and help in advance.
Q. CHANG Unversity of Chinese of Academy of Sciences
-- Carlo U. Segre -- Duchossois Leadership Professor of Physics Interim Chair, Department of Chemistry Director, Center for Synchrotron Radiation Research and Instrumentation Illinois Institute of Technology Voice: 312.567.3498 Fax: 312.567.3494 segre@iit.edu http://phys.iit.edu/~segre segre@debian.org