<?xml version="1.0" encoding="UTF-8"?>
<!-- For help on the notation used to specify an Instrument Definition File
see http://www.mantidproject.org/IDF -->
<instrument xmlns="http://www.mantidproject.org/IDF/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mantidproject.org/IDF/1.0 Schema/IDFSchema.xsd"
name="IMAT" valid-from ="1900-01-31 23:59:59"
valid-to ="2015-07-31 23:59:59"
last-modified="2015-07-31 12:49:00">
  <defaults>
    <length unit="meter"/>
    <angle unit="degree"/>
    <reference-frame>
      <!-- The z-axis is set parallel to and in the direction of the beam. the
           y-axis points up and the coordinate system is right handed. -->
      <along-beam axis="z"/>
      <pointing-up axis="y"/>
      <handedness val="right"/>
    </reference-frame>
    <default-view axis-view="z"/>
  </defaults>
  <!-- BRIEF DESCRIPTION OF IMAT INSTRUMENT:
       IMAT (Imaging and Materials Science & Engineering)
  -->

  <!-- LIST OF PHYSICAL COMPONENTS (which the instrument consists of) -->

  <!-- source and sample-position components -->

  <component type="source">
    <location />
  </component>
  <type name="source" is="Source" />

  <component type="some-sample-holder">
    <location z="19.281"/>
  </component>
  <type name="some-sample-holder" is="SamplePos" />

  <!-- detector components (including monitors) -->
  <component type="monitors" idlist="monitors">
    <location />
  </component>

  <component type="detector-bank" idstart="0" idfillbyfirst="y" idstep="1000" idstepbyrow="1">
    <location z="23.281" x="-0.7" name="detector"/>
  </component>
  <type name="detector-bank" is="rectangular_detector" type="pixel"
  xpixels="512" xstart="-0.48705" xstep="+0.0051"
  ypixels="512" ystart="-0.48705" ystep="+0.0051" >
  </type>
  <type name="pixel" is="detector">
    <cuboid id="shape">
      <left-front-bottom-point x="0.005104167" y="-0.005104167" z="0.0" />
      <left-front-top-point x="0.005104167" y="-0.005104167" z="0.000005" />
      <left-back-bottom-point x="-0.005104167" y="-0.005104167" z="0.0" />
      <right-front-bottom-point x="0.005104167" y="0.005104167" z="0.0" />
    </cuboid>
    <algebra val="shape" />
  </type>

  <!-- DEFINITION OF TYPES -->

  <type name="monitors">
    <component type="monitor-cylinder">
      <!-- the original theoretical positions of the 4 monitors to the center,
           in mm were:
           M1: 11653.4, M2: 19814.4, M3: 20894.4, M4: 46177.4
           which were " taken the CAD dimensions from a datum plane running
           through the EPB axis – datum 4"
      -->
      <location z="11.6534" name="monitor1"/>
      <location z="19.8144" name="monitor2"/>
      <location z="20.8944" name="monitor3"/>
      <location z="46.1774" name="monitor4"/>
    </component>
  </type>

  <!-- shape for monitors, borrowed from GEM -->
  <type name="monitor-cylinder" is="monitor">
    <properties>
      Copied from monitor.dat:

      name:: box
      rank:: 2
      dimensions:: 2 4
      values:: -45.00  -2.00
      45.00  -2.00
      135.00  -2.00
      225.00  -2.00
    </properties>

    <cylinder id="cylinder-shape">
      <centre-of-bottom-base r="0.0" t="0.0" p="0.0" />
      <axis x="0.0" y="0.0" z="1.0" />
      <radius val="0.01" />
      <height val="0.03" />
    </cylinder>
  </type>

  <!-- DETECTOR and MONITOR ID LISTS -->
  <idlist idname="monitors">
    <id start="1" end="4" />
  </idlist>

</instrument>