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<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="nxdlformat.xsl" ?>
<!--
# NeXus - Neutron and X-ray Common Data Format
#
# Copyright (C) 2008-2016 NeXus International Advisory Committee (NIAC)
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#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 3 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# For further information, see http://www.nexusformat.org
-->
<definition name="NXtofnpd" extends="NXobject" type="group"
category="application"
xmlns="http://definition.nexusformat.org/nxdl/3.1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://definition.nexusformat.org/nxdl/3.1 ../nxdl.xsd"
version="1.0b"
>
<doc>This is a application definition for raw data from a TOF neutron powder diffractometer</doc>
<group type="NXentry" name="entry">
<field name="title" />
<field name="start_time" type="NX_DATE_TIME" />
<field name="definition">
<doc> Official NeXus NXDL schema to which this file conforms </doc>
<enumeration>
<item value="NXtofnpd"></item>
</enumeration>
</field>
<field name="pre_sample_flightpath" type="NX_FLOAT"
units="NX_LENGTH">
<doc>
This is the flight path before the sample position. This can be determined by a chopper,
by the moderator or the source itself. In other words: it the distance to the component
which gives the T0 signal to the detector electronics. If another component in the
NXinstrument hierarchy provides this information, this should be a link.
</doc>
</field>
<group type="NXuser" name="user">
<field name="name" type="NX_CHAR"></field></group>
<group type="NXinstrument">
<group type="NXdetector" name="detector">
<field name="data" type="NX_INT" signal="1">
<dimensions rank="2">
<dim index="1" value="ndet" /><dim index="2" value="ntimechan" />
</dimensions>
</field>
<field name="detector_number" type="NX_INT" axis="2">
<dimensions rank="1">
<dim index="1" value="ndet" /></dimensions></field>
<field name="distance" type="NX_FLOAT" units="NX_LENGTH">
<doc>distance to sample for each detector</doc>
<dimensions rank="1">
<dim index="1" value="ndet" /></dimensions></field>
<field name="time_of_flight" type="NX_FLOAT"
units="NX_TIME_OF_FLIGHT" axis="1">
<dimensions rank="1">
<dim index="1" value="ntimechan" /></dimensions>
</field>
<field name="polar_angle" type="NX_FLOAT"
units="NX_ANGLE">
<doc>polar angle for each detector element</doc>
<dimensions rank="1">
<dim index="1" value="ndet"></dim></dimensions>
</field>
<field name="azimuthal_angle" type="NX_FLOAT"
units="NX_ANGLE">
<doc>azimuthal angle for each detector element</doc>
<dimensions rank="1">
<dim index="1" value="ndet"></dim></dimensions>
</field>
</group>
</group>
<group type="NXsample">
<field name="name">
<doc>Descriptive name of sample</doc>
</field>
</group>
<group type="NXmonitor">
<field name="mode">
<doc>
Count to a preset value based on either clock time (timer)
or received monitor counts (monitor).
</doc>
<enumeration>
<item value="monitor" />
<item value="timer" />
</enumeration>
</field>
<field name="preset" type="NX_FLOAT">
<doc>preset value for time or monitor</doc>
</field>
<field name="distance" type="NX_FLOAT" units="NX_LENGTH"></field>
<field name="data" type="NX_INT" signal="1">
<dimensions rank="1">
<dim index="1" value="ntimechan" /></dimensions></field>
<field name="time_of_flight" type="NX_FLOAT"
units="NX_TIME_OF_FLIGHT" axis="1">
<dimensions rank="1">
<dim index="1" value="ntimechan" /></dimensions>
</field>
</group>
<group type="NXdata" name="data">
<link name="data" target="/NXentry/NXinstrument/NXdetector/data"></link>
<link name="detector_number" target="/NXentry/NXinstrument/NXdetector/detector_number"></link>
<link name="time_of_flight" target="/NXentry/NXinstrument/NXdetector/time_of_flight"></link>
</group>
</group>
</definition>