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    Hi,<br>
    <br>
    Welcome to XAFS and all the excitement, thrills and adventure that
    implies!<br>
    <br>
    First, since you are new to the subject, I would strongly recommend
    you take a course<br>
    on XAFS. Many synchrotron facilities offer such - e.g. The APS/IIT
    Summer school was held<br>
    last July; the SSRL course was last August, and NSLS2 had theirs in
    November. Any schools<br>
    being held this year will likely also be announced on this iFeffit
    mailing list.<br>
    <br>
    Some other resources for learning the basics can be found here:<br>
<a class="moz-txt-link-freetext" href="https://www.ixasportal.net/ixas/index.php?option=com_content&view=article&id=46&Itemid=136">https://www.ixasportal.net/ixas/index.php?option=com_content&view=article&id=46&Itemid=136</a><br>
    Matt's introduction is a good place to start.<br>
    <br>
    For "dynamic XAFS" searches, you should consider "pump probe xafs"
    or "time-resolved xafs"<br>
    as search terms. Searching for pump probe xafs for me easily yielded
    this article<br>
    <a class="moz-txt-link-freetext" href="https://link.springer.com/chapter/10.1007/978-3-319-43866-5_9">https://link.springer.com/chapter/10.1007/978-3-319-43866-5_9</a><br>
    <br>
    As for simulation of XAFS, one program is FEFF, developed by the
    Rehr Group at the University of Washington<br>
    <a class="moz-txt-link-freetext" href="http://feff.phys.washington.edu/">http://feff.phys.washington.edu/</a><br>
    FEFF9 (8, 7) requires a license and modest fee for academic use, and
    is widely used for simulating both the <br>
    near edge and extended fine structure. Bruce Ravel's Demeter suite
    of programs for XAFS processing and analysis<br>
    includes an earlier version (FEFF6). Demeter is free - mostly a
    labour of love by Bruce, and he likes beer and maple syrup if you
    happen to run into him at a conference.<br>
    <br>
    FDMNES (Yves Joly group, Institut Neel) is another program for
    simulating the near-edge. I find it works<br>
    quite well. It allows for tweaking of the starting electronic
    configuration as well (with cautionary notes) that<br>
    might be useful for simulating excited systems (I haven't checked
    literature to see if anyone has done so).<br>
    <br>
    An additional program of note for fitting and simulation is GNXAS
    (DiCicco group, U. Camerino) but I haven't<br>
    used it myself.<br>
    <br>
    I am probably overlooking others, but these should get you going. I
    strongly recommend you take a course<br>
    on the basics before plunging into any of these.<br>
    <br>
    cheers,<br>
    Robert<br>
    <br>
    <div class="moz-cite-prefix">On 2019-01-23 1:26 p.m., Hunter Allison
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAH6J0e_vk1n4viX8H5A4vX=SRL0e5NQHmSZGEQ43wVxBzpwo5Q@mail.gmail.com">
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                    I'm a graduate student at the University of
              California, Irvine. Firstly, thank you for all the copious
              resources. It is a treasure trove of information and a
              beacon of light for someone just starting out. </div>
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                   Let's begin with some brief background. In my
              research group, we intend to perform pump-probe
              spectroscopy with attosecond x-ray probes. The Professor
              says that we can use XAFS to study how the electrons move
              on these very short timescales. While the system is being
              setup and other experiments are being conducted, my
              Professor wants me to figure out how to do simulations of
              XAFS. This is a bit of a daunting order, since I've never
              simulated anything before and only have basic programming
              knowledge. The only direction I have is, "Try Google.".</div>
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                   So, today, I've been "trying Google" and found my way
              to here. Since, I don't really know what I'm doing, I
              thought I try asking and finding out if anyone else does
              this sort of thing:</div>
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                style="font:400 13.33px/19.99px
Arial,Helvetica,sans-serif;text-align:left;color:rgb(34,34,34);text-transform:none;text-indent:0px;letter-spacing:normal;text-decoration:none;word-spacing:0px;display:inline;white-space:normal;font-size-adjust:none;font-stretch:100%;float:none;background-color:transparent">How/where
                does one do simulations of dynamic XAFS? Where would I
                get started?</span></div>
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                style="font:400 13.33px/19.99px
Arial,Helvetica,sans-serif;text-align:left;color:rgb(34,34,34);text-transform:none;text-indent:0px;letter-spacing:normal;text-decoration:none;word-spacing:0px;display:inline;white-space:normal;font-size-adjust:none;font-stretch:100%;float:none;background-color:transparent">(Please
                forgive me if this question has been answered somewhere
                else or if it seems profoundly dumb or too broad. I'm
                really just looking for some more direction. Perhaps, it
                could be that nobody does this and, in that case, I need
                to figure out how to model this myself. Wow! That
                thought seems daunting.)</span><br>
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                   For example, let's say I want to find out how the
              x-ray adsorption of a carbon foil like Graphene would
              change on attosecond time scales as it's heated by a
              femtosecond laser and electrons move. Is there a program
              or code out there that people use to model this sort of
              thing?<br>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
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