[Ifeffit] athena 0.8.020 and artemis 0.6.005

[Bruce Ravel]

Hi folks,

Just in time for the XAFS conference, I am announcing new releases of
Athena and Artemis.  There are not many major new features this time,
but there is a long list of bug fixes and usability enhancements.  If
you have not yet upgraded to Ifeffit 1.2.1, you should do so, then
download the latest versions of my codes.  As always, new source code
tarballs and windows executables can be found on my downloads page.

For those Windows users new to the mailing list, I'll explain how to
install the new executables.  It's quite simple.  Grab the .exe files
from my downloads page and drop them in the C:\Program Files\Ifeffit\
folder on top of the old versions.  If you installed to some other
location, then drop th new executables there.  Doing this is enough to
leave the desktop and Start Menu icons functional.

The one major new feature in Artemis is the ability to set restraints
on your parameters.  It's as simple as setting a math expression on
the "Guess. Def, Set" page and flagging the parameter as a restraint.
The restraint defined this way will then be used in the fit.  If you
are interested in using restraints, you should read the following:
  http://cars9.uchicago.edu/ifeffit/refman/node55.html
  http://cars9.uchicago.edu/xafs/Advanced_Methods/BNLworkshop2001/newville.pdf
There is an example project file using a restraint in the source code
tarball which follows very closely the restraints example from the
ifeffit source code tarball.

There really are a lot of improvements this time around and it is well
worth updating.  Check out the change logs on my web site for all the
details.  

The acknowledgment list is a long one this time.  Among those with
helpful bug reports and good suggestions: Scott Calvin, Vince Harris,
Dale Brewe, Adam Webb, Mark Jensen, Paul Fons, and Grazia Proietti.
Thanks to all of you.  The award for the loopiest suggestion which I
had no good reason to refuse goes to Mark Bondin, who wants to use
Athena for background removal and Xfit for data analysis!

B

P.S.  There are a few of you who have expressed an interest in using
      Artemis to analyze your DAFS data.  It was pointed out to me
      that I had forgotten to include the dphase path parameter in
      Artemis.  That has been fixed, although the dphase parameter is
      hidden along with the k_array, amp_array, and phase_array path
      parameters.

      If you want to use dphase or any of the other three "hidden"
      parameters, go to the Paths menu and click on the button at the
      bottom of the menu that reads "Extended path parameters".  When
      you click it on, text boxes for dphase and the _array path
      parameters will be displayed on the paths page in Artemis.

P.P.S.  I am giving a poster about Athena and Artemis at the XAFS
        conference.  My time is Wednesday during the 16.15 to 17.45
        session.  If you'll be at the conference, stop by and say hi.
        I'd enjoy meeting those of you I don't already know and would
        enjoy catching up with those I do.


-- 
 Bruce Ravel  ----------------------------------- ravel at phys.washington.edu
 Code 6134, Building 3, Room 222
 Naval Research Laboratory                          phone: (1) 202 767 5947
 Washington DC 20375, USA                             fax: (1) 202 767 1697

 NRL Synchrotron Radiation Consortium (NRL-SRC)
 Beamlines X11a, X11b, X23b, X24c, U4b
 National Synchrotron Light Source
 Brookhaven National Laboratory, Upton, NY 11973

 My homepage:    http://feff.phys.washington.edu/~ravel 
 EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/