- Ifeffit - millenia.cars.aps.anl.gov

RE: [Ifeffit] regarding Lytle detector
by Barton, David (DG) 01 May '06

01 May '06

Soma, I believe the person that they were referring to was John Kulpin who was employed at DND-CAT. He left APS and Argonne a couple of years ago and I don't know where he is at now. Dave Barton > -----Original Message----- > From: ifeffit-bounces(a)millenia.cars.aps.anl.gov > [mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf > Of soma(a)agni.phys.iit.edu > Sent: Monday, May 01, 2006 11:03 AM > To: XAFS Analysis using Ifeffit > Subject: [Ifeffit] regarding Lytle detector > > > > Hi MAtt > > Carlo told me to ask you about this one: > > Is there somebody in APS who has been trained by Farrel > Lytle's company to repair Lytle detectors for APS beamlines? > Jeff Terry said that Lytle did train somebody but we do not > know the person's name. > > IF you know the name of this person, could you please drop me > a line so that we can contact him regarding repair of few of > our lytle detectors? > > Thanks a lot > Soma > > _______________________________________________ > Ifeffit mailing list > Ifeffit(a)millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit >

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RE: [Ifeffit] regarding Lytle detector
by Kelly, Shelly D. 01 May '06

01 May '06

I don't know... SK > -----Original Message----- > From: ifeffit-bounces(a)millenia.cars.aps.anl.gov [mailto:ifeffit- > bounces(a)millenia.cars.aps.anl.gov] On Behalf Of soma(a)agni.phys.iit.edu > Sent: Monday, May 01, 2006 10:03 AM > To: XAFS Analysis using Ifeffit > Subject: [Ifeffit] regarding Lytle detector > > > Hi MAtt > > Carlo told me to ask you about this one: > > Is there somebody in APS who has been trained by Farrel Lytle's company to > repair Lytle detectors for APS beamlines? Jeff Terry said that Lytle did > train somebody but we do not know the person's name. > > IF you know the name of this person, could you please drop me a line so > that we can contact him regarding repair of few of our lytle detectors? > > Thanks a lot > Soma > > _______________________________________________ > Ifeffit mailing list > Ifeffit(a)millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit

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XAFS Summer School at APS
by Matt Newville 01 May '06

01 May '06

Hi Folks, There will be an XAFS Summer School at the Advanced Photon Source, Argonne July 26 to July 28, 2006. The school this year will be a little different from the XAFS Schools held over the past few years at the APS and NSLS. This year, we will cover "advanced analysis". The school will be 3 days, there will be no beam time involved, and students will be expected to be familiar with XAFS and data processing (at approximately the level of using Athena). Instructors will include Bruce Ravel, Scott Calvin, Shelly Kelly, and myself. For more details, and to apply for this years XAFS summer school, see http://cars.uchicago.edu/xafs_school/ The application deadline is June 1st. --Matt

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FEFF8
by Ivana Radisavljevic 26 Apr '06

26 Apr '06

Dear Mr. Ravel, I have read in one of the papers of the authors A.I. Lebedev and I.A. Sluchinskaya that Pb scattering form factors in FEFF6 were not precisely determined. As I am dealing with the similar systems, Pb1-xMnxTe(In, Ga) to be precise, could You please tell me if this is also true for the FEFF8 version (if it is true et all)? Another thing that bothers me is that all of the real part Furier transformed EXAFS spectra taken at the tellurium K edge, appear to have the first peak divided. Since there is no direct indication of the sub-shells' existence and having in mind the similar tellurium feature noticed in Your paper "Combined EXAFS and first-principles theory study of Pb1-xGexTe", I am wondering what this feature should represent? I thank You very much in advance, Ivana Radisavljevic Vinca Institute for Nuclear Sciences, Lab 011 P.O. Box. 522, 11001 Belgrade, Serbia and Montenegro Tel. +381 11 2458222/434 Fax. +381 11 3440100 E-mail: iva(a)vin.bg.ac.yu

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(no subject)
by tony vitova 25 Apr '06

25 Apr '06

Hi, I just started to do EXAFS analysis with Artemis and I am not sure if my fit is sufficiently good. It is an attempt to fit the first shell: the first two peaks of LiNbO3 (Nb absorber). Could somebody have a fast look at my Artemis project? I wanted to fix the amplitude and to vary the coordination numbers, thus the places of "N" and "SO2" are changed. Is there another way to do this? Thanks a lot! Tonya --------------------------------- How low will we go? Check out Yahoo! Messengers low PC-to-Phone call rates.

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RE: [Ifeffit] dk setting in Athena
by Kelly, Shelly D. 24 Apr '06

24 Apr '06

Hi Geoff, I don't think that I understand your definition of dk, so I am going to give you mine. A Fourier transform is a complex transformation that requires the data that is being transformed to be defined from -infinity to +infinity. Since our data does not cover this range, we pad the data set with zeros for most of the transformed data range. At the edges in between the actual data range and all the zeros there is a step function, as the data goes from zero to some non-zero number abruptly. A Fourier transform (FT) of a step function is a bunch of signals at all R-values called a FT ripple. This is not a good think to have in your FT. So we spread out the step function by applying a window. The length of the window is defined by dk. In general dk should not be zero. See this presentation for some more discussion of dk. http://www.mesg.anl.gov/Presentations/basics%20of%20exafs%20analysis%202 003.pdf HTH Shelly > -----Original Message----- > From: ifeffit-bounces(a)millenia.cars.aps.anl.gov [mailto:ifeffit- > bounces(a)millenia.cars.aps.anl.gov] On Behalf Of Geoff Eldridge > Sent: Monday, April 24, 2006 10:29 AM > To: Ifeffit List > Subject: [Ifeffit] dk setting in Athena > > Hello everyone, > > I've just started doing EXAFS in my research and I have found all your > posts to be very helpful. > > My question is about the dk setting in Athena. I know from earlier > reading that dk affects where the window for the FT is set in k-space > (i.e. a dk setting of one moves the window out further than the k-min > and k-max settings). I believe the purpose of this is to prevent > cutting the tops of peaks out of the FT window. If this is the case, > would a dk setting of 0 then be appropriate provided no parts of peaks > are clipped as shown in a k-space plot with the window shown? > > Thanks, > > Geoff > _______________________________________________ > Ifeffit mailing list > Ifeffit(a)millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit

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dk setting in Athena
by Geoff Eldridge 24 Apr '06

24 Apr '06

Hello everyone, I've just started doing EXAFS in my research and I have found all your posts to be very helpful. My question is about the dk setting in Athena. I know from earlier reading that dk affects where the window for the FT is set in k-space (i.e. a dk setting of one moves the window out further than the k-min and k-max settings). I believe the purpose of this is to prevent cutting the tops of peaks out of the FT window. If this is the case, would a dk setting of 0 then be appropriate provided no parts of peaks are clipped as shown in a k-space plot with the window shown? Thanks, Geoff

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Artemis- Loading up error
by Zohair Hussain 17 Apr '06

17 Apr '06

Hi! I recently had to install ifeffit software package on our network computer. The first time I ran Artemis I was asked to update which I did. However, Artemis did not start after that. The error message that I got is shown in the attached figures artemis-error1a and 1b. Please note that only Artemis doesn't work, all the other softwares (Athena, Hephaestus, TKAtoms etc.) work fine. I tried running the .bat file from the Ifeffit folder but that didn't work either. I also tried to run the artemis.exe file and received the error shown in figure "artemis-error2". Later I unisntalled and re-installed Ifeffit and chose not to do the updates and Artemis is now running fine. I was wondering if anyone has any idea why this is so or if there is a way around installing the updates and still being able to use Artemis??? Thanks, Zohair

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problem compiling ifeffit 1.2.8
by Igor Vasconcelos 12 Apr '06

12 Apr '06

Dear all, I came across the following error when trying to compile ifeffit-1.2.8 (uprading from version 1.2.6) in my Linux FC4 box: ifort -g -c ifftest1.f fortcom: Error: ifftest1.f, line 202: A RETURN statement is invalid in the main program. return -------^ compilation aborted for ifftest1.f (code 1) make[3]: *** [ifftest1.o] Error 1 Does anyone know what the problem might be? Thanks, Igor _________________________________________________________________ Dont just search. Find. Check out the new MSN Search! http://search.msn.click-url.com/go/onm00200636ave/direct/01/

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Log-ratio method
by lisandro＠fisica.unlp.edu.ar 11 Apr '06

11 Apr '06

Hi, I recently realized that Athena implement the ratio method as an analysis tool. I have look in the ifeffit web page and Athena manual and can not find any manual or user guide. Does anyone know any kind of instructive or manual for this type of analysis with Athena? Thanks Lisandro Giovanetti

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