Dear, My name is Alessandro Lisboa. I am a phd student of physics in Brazil - University of Brasilia. In the last February was held the first experiment DAFS in the Laboratório Nacional de Luz Síncrotron of Brazil. I performed this experiment and now I'm trying to analyze the data. I am having difficulty to establishing a procedure for analysis. I've read many things about. I tried to generate the diffkk.inp but I can not get result. I do not know what I'm doing wrong. I ask, please, help me with a procedure to analyze. For example, what is the sequence of files that need to create and run? I would be eternally grateful for your help. Regards, Alessandro Lisboa -- ----- *M.Sc. Alessandro F. Lisboa MoreiraPh.D. Student Complex Fluids GroupUniversidade de Brasília (UnB) - Instituto de FísicaBrasília/DF (Brazil)*
Wow! A diffkk question. Such a blast from the past! Have you examined the examples Matt provides at http://cars9.uchicago.edu/dafs/diffkk/ ? Diffkk isn't exactly a DAFS analysis program, but it's a tool that may be useful for analyzing your dafs. Diffkk takes XAFS data as input, converts it to f" and does a Kramers-Kronig transform to make an f' function with fine structure wiggles. There is a lot more to dafs analysis than just that. I'm not sure if anyone who contributes regularly to the list has done a dafs experiment recently. I certainly haven't. I'm not sure if any packaged software is available. Many of us wrote our own in a one-off manner. That's what I did. Perhaps someone else can comment.... Good luck, B On 04/09/2014 04:39 PM, Alessandro Lisboa wrote:
Dear,
My name is Alessandro Lisboa. I am a phd student of physics in Brazil - University of Brasilia. In the last February was held the first experiment DAFS in the Laboratório Nacional de Luz Síncrotron of Brazil. I performed this experiment and now I'm trying to analyze the data. I am having difficulty to establishing a procedure for analysis. I've read many things about. I tried to generate the diffkk.inp but I can not get result. I do not know what I'm doing wrong. I ask, please, help me with a procedure to analyze. For example, what is the sequence of files that need to create and run?
I would be eternally grateful for your help.
Regards,
Alessandro Lisboa
-- ----- /M.Sc. Alessandro F. Lisboa Moreira Ph.D. Student Complex Fluids Group Universidade de Brasília (UnB) - Instituto de Física Brasília/DF (Brazil)/
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-- Bruce Ravel ------------------------------------ bravel@bnl.gov National Institute of Standards and Technology Synchrotron Science Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973 Homepage: http://xafs.org/BruceRavel Software: https://github.com/bruceravel
Hi Alessandro,
On Wed, Apr 9, 2014 at 3:39 PM, Alessandro Lisboa
Dear,
My name is Alessandro Lisboa. I am a phd student of physics in Brazil - University of Brasilia. In the last February was held the first experiment DAFS in the Laboratório Nacional de Luz Síncrotron of Brazil. I performed this experiment and now I'm trying to analyze the data. I am having difficulty to establishing a procedure for analysis. I've read many things about. I tried to generate the diffkk.inp but I can not get result. I do not know what I'm doing wrong. I ask, please, help me with a procedure to analyze. For example, what is the sequence of files that need to create and run?
DIFFKK should work. You need to give it (by listing in diffkk.inp) a file with mu(E). Beyond that, I can't really guess what you've done and what has or hasn't worked. Can you send an example of what you've tried? Cheers, --Matt
participants (3)
-
Alessandro Lisboa -
Bruce Ravel -
Matt Newville