diff --git a/instrument/V20_4-tubes_150deg_Definition_v01.xml b/instrument/V20_4-tubes_150deg_Definition_v01.xml
index f124bc641ea87c3f4a44f41ad39e96f2a8d04e50..1b270aeaf13d461c0d48798c7af92dbd8341ed7f 100644
--- a/instrument/V20_4-tubes_150deg_Definition_v01.xml
+++ b/instrument/V20_4-tubes_150deg_Definition_v01.xml
@@ -1,6 +1,7 @@
<?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 -->
+<!-- IDF configurations can be gound here https://github.com/mantidproject/documents/blob/master/IDF-Configurations/V20_idf_configurations_v05.pptx -->
<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 ="2099-12-31 23:59:59"
@@ -19,7 +20,7 @@ last-modified="2018-02-09 09:00:00">
</defaults>
<component type="source-chopper">
- <location x="0.0" y="0.0" z="-50.6"/>
+ <location x="0.0" y="0.0" z="-28.9"/>
</component>
<type name="source-chopper"/>
diff --git a/instrument/V20_4-tubes_90deg_Definition_v01.xml b/instrument/V20_4-tubes_90deg_Definition_v01.xml
index f798c1ca10ba3ef246ea8d465661d3a5c2b51c94..e60b04144da4c94225646941f05b950306304906 100644
--- a/instrument/V20_4-tubes_90deg_Definition_v01.xml
+++ b/instrument/V20_4-tubes_90deg_Definition_v01.xml
@@ -1,6 +1,7 @@
<?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 -->
+<!-- IDF configurations can be gound here https://github.com/mantidproject/documents/blob/master/IDF-Configurations/V20_idf_configurations_v05.pptx -->
<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 ="2099-12-31 23:59:59"
@@ -19,7 +20,7 @@ last-modified="2018-02-09 09:00:00">
</defaults>
<component type="source-chopper">
- <location x="0.0" y="0.0" z="-50.6"/>
+ <location x="0.0" y="0.0" z="-28.9"/>
</component>
<type name="source-chopper"/>
@@ -42,7 +43,7 @@ last-modified="2018-02-09 09:00:00">
<location x="-0.070" />
<location x="-0.035" />
<location x="0.000" />
- <location x="-0.035" />
+ <location x="0.035" />
</component>
</type>
diff --git a/instrument/V20_Transm_BeamMonitor_Definition_v01.xml b/instrument/V20_Transm_BeamMonitor_Definition_v01.xml
new file mode 100644
index 0000000000000000000000000000000000000000..9a3777c977f49c2821ab272939074eff43772bf4
--- /dev/null
+++ b/instrument/V20_Transm_BeamMonitor_Definition_v01.xml
@@ -0,0 +1,54 @@
+<?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 -->
+<!-- IDF configurations can be gound here https://github.com/mantidproject/documents/blob/master/IDF-Configurations/V20_idf_configurations_v05.pptx -->
+<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 ="2099-12-31 23:59:59"
+last-modified="2018-02-09 09:00:00">
+ <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>
+
+ <component type="source-chopper">
+ <location x="0.0" y="0.0" z="-25.3"/>
+ </component>
+ <type name="source-chopper"/>
+
+ <component type="wfm-chopper">
+ <location x="0.0" y="0.0" z="-18.45"/>
+ </component>
+ <type name="wfm-chopper" is="Source" />
+
+ <component type="some-sample-holder">
+ <location x="0.0" y="0.0" z="0"/>
+ </component>
+ <type name="some-sample-holder" is="SamplePos" />
+
+ <component name="transmission-beam-monitor" type="monitor" idlist="monitor-id-list">
+ <location x="0.0" y="0.0" z="0.030" />
+ </component>
+
+ <type name="monitor" is="monitor">
+ <cuboid id="shape">
+ <left-front-bottom-point x="0.02" y="-0.0525" z="0.0" />
+ <left-front-top-point x="0.02" y="-0.0525" z="0.040" />
+ <left-back-bottom-point x="-0.02" y="-0.0525" z="0.0" />
+ <right-front-bottom-point x="0.02" y="0.0525" z="0.0" />
+ </cuboid>
+ </type>
+
+ <idlist idname="monitor-id-list">
+ <id val="3" />
+ </idlist>
+
+</instrument>