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Direct Inelastic Changes
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.. contents:: Table of Contents
   :local:

Bug Fixes
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- :ref:`SofQWNormalisedPolygon <algm-SofQWNormalisedPolygon>` has been fixed to normalize the data correctly. Previous versions contained a bug when removing the bin-width normalization that may have already been present on the input data

Improvements
------------

- New CNCS formula to calculate T0 accounts for different phasing of the choppers since August 2015
- The documentation for all calibration approaches, including PSD tube calibration has been pulled together :ref:`here <Calibration Intro>`.
- Many improvements have been made to the VATES command line interface, these are detailed in the :ref:`Framework section <R3.7 Vates CLI>` of the release notes.


Crystal Field
-------------

- A fitting function was added (:ref:`CrystalFieldSpectrum <func-CrystalFieldSpectrum>`) that fits crystal field parameters to a spectrum.  It is based on fortran program FOCUS which was translated into C++.

Phonon DOS
----------

The old PySlice routine to compute the phonon DOS from powder data using the incoherent approximation has
been ported and is now a Mantid Python Algorithm :ref:`ComputeIncoherentDOS <algm-ComputeIncoherentDOS>`.

`Full list of changes on GitHub <http://github.com/mantidproject/mantid/pulls?q=is%3Apr+milestone%3A%22Release+3.7%22+is%3Amerged+label%3A%22Component%3A+Direct+Inelastic%22>`_