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Dear McStas users,<br /><br />I'm glad to announce the iFit 1.8 release.<br /><br />iFit can be used to launch McStas simulations and optimisations. See <<a href="http://ifit.mccode.org/McStas.html">http://ifit.mccode.org/McStas.html</a>>.<br />I also provide powerfull data treatment methods to plot and analyse McStas data.<br />This release can also generate powder spectrum from phonon dispersions estimated from DFT. The whole procedure is fully automatic. Use sqw_phonons, then sqw_powders. Such powders can then be used to model any inelastic contribution from a powfer material, in McStas.<br /><br /> iFit 1.8 contains many bug fixes, but the most important changes are listed below:<br /><ol>
<li><strong>I/O</strong>: read <a href="https://www.ill.eu/instruments-support/instruments-groups/instruments/cyclops/description/instrument-layout/" target="_blank">ILL Cyclops</a> HBIN and <a href="https://en.wikipedia.org/wiki/IDL_%28programming_language%29" target="_blank">IDL</a> SAV files.</li>
<li><strong>Math</strong>: Iterative deconvolution as <em>deconv</em> method. Better handling of event data sets, and other improvements.</li>
<li><strong>Phonons</strong>: Major upgrade of <a href="http://ifit.mccode.org/Models.html#mozTocId990577" target="_blank"><em>ab-initio</em> DFT phonon dispersion</a> Model, which now supports EMT, GPAW, ABINIT, Elk, Dacapo, NWChem, QuantumEspresso and VASP when installed.</li>
<li><strong> <a href="http://ifit.mccode.org/Treatment.html" target="_blank">S(q,w) treatment</a></strong> scripts to compare MD and measured dynamic structure factor, compute dynamic range, generalized density of states, total scattering cross sections, characteristic frequencies, powder average from 4D S(hkl,w).</li>
<li><strong>Matlab</strong> support: Full compatibility with Matlab releases >= R2014b.</li>
</ol>As usual, the release is available as:<br />
<ul>
<li><strong>source</strong> code for Matlab <<a href="http://ifit.mccode.org/Downloads/iFit.zip" target="_blank">http://ifit.mccode.org/Downloads/iFit.zip</a>></li>
<li>standalone packages for 64 bit systems:</li>
<ul>
<li><strong>Window</strong> Installer<<a href="http://ifit.mccode.org/Downloads/binary/win64/iFit-1.8-Setup64.exe" target="_blank">http://ifit.mccode.org/Downloads/binary/win64/iFit-1.8-Setup64.exe</a>></li>
<li><strong>Linux</strong> <<a href="http://ifit.mccode.org/Downloads/binary/glnx64/ifit-1.8-amd64.deb" target="_blank">http://ifit.mccode.org/Downloads/binary/glnx64/ifit-1.8-amd64.deb</a>>, but you should install package<em> ifit-phonons</em> to benefit from full phonons support. See <a href="http://ifit.mccode.org/Models.html#mozTocId183326" target="_blank">here</a> and below.</li>
<li><strong>MacOSX</strong> <<a href="http://ifit.mccode.org/Downloads/binary/mac64/iFit-1.8.app.zip" target="_blank">http://ifit.mccode.org/Downloads/binary/mac64/iFit-1.8.app.zip</a>>. No need to install the MCRInstaller. To force open and pass the missing signature error, use Ctrl-Click menu, then Open.</li>
</ul>
</ul>
We recommend using a Linux Debian based system (Ubuntu/Debian/Mint...), which can be a virtual machine, and install with the procedure:<br /><br />
<pre style="padding-left: 30px;">sudo apt-add-repository 'deb http://packages.mccode.org/debian stable main'<br />sudo apt-get update<br />sudo apt-get install ifit-phonons<br /><br /></pre>
which does it all with DFT code support for phonons (ifit, mcrinstaller, DFT codes, ASE).<br /><br />Cheers, Emmanuel.
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<pre>-- <br />FARHI Emmanuel <farhi@ill.fr>
Groupe DS/CS, ILL4/156, Tel (33) 4 76 20 71 35
ILL, Grenoble</pre>
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