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Manual copied from ANSTO branch and committed to RELEASE-3_0 branch.

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This directory was accidentally omitted from the merge-release branch during the PSI code merge.
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Nick Hauser
2013-10-28 11:22:59 +11:00
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site_ansto/manual/dbSICSch26_magnet_11T.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<?oxygen RNGSchema="http://www.oasis-open.org/docbook/xml/5.0/rng/docbook.rng" type="xml"?>
<chapter xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink"
version="5.0">
<info><title>11 Tesla Magnet</title><author>
<personname>Ferdi Franceschini</personname>
</author>
<date>2008-08-29 16:47</date>
</info>
<sect1>
<title>Configuration</title>
<para>The driver is loaded into SICS by adding the following line in the
<literal>/usr/local/sics/extraconfig.tcl</literal> file </para>
<para><command>select_environment_controller "11TMagnet"</command></para>
<para>Make sure that the other entries are commented out, save the file and restart SICS.</para>
<para>This will set up the lakeshore temperature controller as well as the magnet power
supply control. They will appear as <varname>tc1</varname> and <varname>ips120</varname>
under the <varname>sample</varname> group in GumTree.</para>
</sect1>
<sect1>
<title>Commands</title>
<para>When the magnet power supply is switched on it sets itself to "clamped" mode. This
means that the output is short-circuited. </para>
<para><emphasis> You must unclamp it to set the magnetic field.</emphasis></para>
<variablelist>
<varlistentry>
<term><command>hset /sample/ips120/Control/A 0</command></term>
<listitem>
<para>Unclamps the magnet</para>
<para><emphasis>It will show that it's at zero already, set it
anyway</emphasis></para>
</listitem>
</varlistentry>
<varlistentry>
<term><command>drive ips120_driveable </command><replaceable>n</replaceable></term>
<listitem>
<para>Drive the magnet to <replaceable>n</replaceable> Tesla</para>
</listitem>
</varlistentry>
</variablelist>
</sect1>
<sect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><command>/sample/ips120/sensor/value </command></term>
<listitem>
<para>This reading is taken from the power supply leads while the magnet is
ramping up. </para>
<para>After the setpoint has been reached and the magnet is "holding" the field
then SICS will read the field from the magnet status register of the power
supply.</para>
</listitem>
</varlistentry>
</variablelist>
</sect1>
<sect1>
<title>Description</title>
<para>The magnet is normally in persistent mode (switch heater off) with the power supply at
zero amps. The <command>drive</command> command drives the power supply to the magnet
current, takes the magnet out of persistent mode (turns the switch heater on), drives
the magnet to the new field, returns the magnet to persistent mode (turns the switch
heater off) and ramps the power supply current back to zero. </para>
<para>There are time delays to allow the switch to operate. </para>
</sect1>
<sect1>
<title>Known Issues</title>
<para>If you set the limits to run at maximum magnet field, but do not run the lambda plate,
<emphasis>you will quench the magnet. </emphasis> This driver does not check to see
if the magnet temperature when driving maximum field. The SICS anticollider should be
used to set allowed values.</para>
</sect1>
</chapter>