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SANS2D_Definition_Tubes.xml
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SANS2D_Definition_Tubes.xml
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<?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 http://schema.mantidproject.org/IDF/1.0/IDFSchema.xsd"
name="SANS2D" valid-from ="2014-02-01 23:59:59"
valid-to ="2100-01-31 23:59:59"
last-modified="2014-02-02 00:00:00">
<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>
<!-- BRIEF DESCRIPTION OF SANS2d INSTRUMENT:
Data provided by Richard Heenan (and Freddie) for the SANS2D instrument
12/06/09 this version has X & Y coords detector swapped so orientation
is correct for temporary wiring table.
18/06/09 better distances for detectors and both at L2=4m, front at X=-1.1m
26/06/09 swap front & rear as names wrong, translate front in opposite direction
21/07/09 remove the 150mm sideways shift (i.e. back to symmetrical detector coords)
to simplify manipulations in Mantid and help allow for detector mapping not quite
as expected.
01/02/10 very small change to pixel size 191*5.1=974.2=2*487.05 (was 487.4)
- note have to swap x= and y= in Anders output list !
02/04/12 Put in 'no shape monitors' for possible in the future monitors
with ID 5-8
04/02/14 start again with gas tube arrays
14/03/14 correct the active tube length to 1041.4mm, zigzag offset 3mm
-->
<!-- 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>
<type name="monitors">
<component type="monitor-tbd">
<!-- better positions and shapes will be defined later -->
<location z="7.217" name="monitor1"/>
<location z="17.937" name="monitor2"/>
</component>
<component type="Moderator-Monitor3">
<!-- transmisssion detector, either in or out of beam -->
<location z="19.497" name="monitor3"/>
</component>
<component type="monitor-tbd">
<!-- better positions and shapes will be defined later -->
<location z="30.0" name="monitor4"/>
</component>
<!-- Putting in monitors, which are defined in raw/nexus
files, and have detector IDs, but currently not physically present
on the instrument. Defined with no geometric shape, as they do not
physically exist, and with a dummy position -->
<component type="no shape monitor">
<location z="0" name="placeholder monitor"/>
<location z="0" name="placeholder monitor"/>
<location z="0" name="placeholder monitor"/>
<location z="0" name="placeholder monitor"/>
</component>
</type>
<type name="monitor-tbd" is="monitor">
<cylinder id="some-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>
<type name="Moderator-Monitor3" is="monitor">
<percent-transparency val="99.9" />
<cuboid id="shape">
<left-front-bottom-point x="0.0125" y="-0.0125" z="0.0" />
<left-front-top-point x="0.0125" y="-0.0125" z="0.005" />
<left-back-bottom-point x="-0.0125" y="-0.0125" z="0.0" />
<right-front-bottom-point x="0.0125" y="0.0125" z="0.0" />
</cuboid>
<algebra val="shape" />
</type>
<type name="no shape monitor" is="monitor" />
<!-- default position is at 4m with rear detector exactly centred on beam and fron detector 1.1m sideways -->
<component type="detector-bank" idlist="FrontDetector" name="front-detector">
<location x="1.1" z="23.281" />
</component>
<component type="detector-bank" idlist="RearDetector" name="rear-detector">
<location z="23.281" />
</component>
<type name="detector-bank">
<!-- the horizontal tubes are spaced vertically at 8.1mm intervals, with left and right sets ~3mm displaced -->
<component type="SANSLeftTube">
<locations y="-0.48195" y-end="0.47385" n-elements="60" name="left" />
</component>
<component type="SANSRightTube">
<locations y="-0.473855" y-end="0.48195" n-elements="60" name="right" />
</component>
</type>
<type name="SANSLeftTube" outline="yes">
<component type="pixel">
<locations x="-0.5192" x-end="0.5222" n-elements="512" />
</component>
</type>
<type name="SANSRightTube" outline="yes">
<component type="pixel">
<locations x="-0.5222" x-end="0.5192" n-elements="512" />
</component>
</type>
<!-- the length of one pixel is assumed 1041.4/512 = 2.033984375mm, the internal radius is less then given here, more like 7.8mm/2 -->
<type name="pixel" is="detector">
<cylinder id="cyl-approx">
<centre-of-bottom-base r="0.0" t="0.0" p="0.0" />
<axis x="1.0" y="0.0" z="0.0" />
<radius val="0.00405" />
<height val=" 0.002033984375" />
</cylinder>
<algebra val="cyl-approx" />
</type>
<!-- Monitor & Detector ID Lists, note the "left" tubes are followed by the "right" tubes,
in the same order as the y locations list, starting at the bottom
they are numbered dgttppp where d=1 for rear, 2 for front
g= 1 to 5 for boards/cables
tt= 0 to 23 for tube number on that board
ppp=0 to 512 for pixels
There are 5 boards of 24 tubes,each 1m long, for each detector.
note that the spectrum mapping will normally reduce the number of pixels to 256 or 128
[note also that the wiring table inverts the raw 0 to 511 pixel numbers to 511 to 0 so we get the correct direction] -->
<idlist idname="monitors">
<id start="1" end="8" />
</idlist>
<idlist idname="RearDetector">
<id start=" 1100000 " end=" 1100511 " />
<id start=" 1102000 " end=" 1102511 " />
<id start=" 1104000 " end=" 1104511 " />
<id start=" 1106000 " end=" 1106511 " />
<id start=" 1108000 " end=" 1108511 " />
<id start=" 1110000 " end=" 1110511 " />
<id start=" 1112000 " end=" 1112511 " />
<id start=" 1114000 " end=" 1114511 " />
<id start=" 1116000 " end=" 1116511 " />
<id start=" 1118000 " end=" 1118511 " />
<id start=" 1120000 " end=" 1120511 " />
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</idlist>
<idlist idname="FrontDetector">
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</idlist>
</instrument>