0fac95ea9b
- The crystal settings calculation in hkl now tried to put omega into the limts by calculating a delta omega. - TRICS data files now include HKL and the UB - The scan module has been expanded to support user defined scans which run a script at any scan point. - A small fix to the PSD code in SinqHM_srv_filler
66 lines
2.5 KiB
HTML
66 lines
2.5 KiB
HTML
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<TITLE>The Four Circle Diffractometer TRICS</TITLE>
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<H1>The Four Circle Diffractometer TRICS</H1>
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<P>
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<h2>Introduction</h2>
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The four circle diffractometer TRICS is used for the study of dynamic
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and magentic structures
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by neutron diffraction at single crystals. TRICS can be operated in two
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modes: 1.) with a single counter very much like a traditional four circle
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diffractometer and 2.) with three position sensitive detectors operating
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like a oscillation camera as used by protein crystallographers.
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This manual describes the operation of TRICS
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using the SICS software.
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</P>
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<p>
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TRICS is situated at one of the beamlines for thermal neutrons at the
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spallation source SINQ at PSI, Switzerland. The incident white neutron
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beam first hits a
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monochromator crystal. The selected wavelength is not variable. A
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monochromator lift with two monochromators and the possiblity to select
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different reflections peaks however make it
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possible to select between a few different neutron wavelength. The sample is
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held in a standard eulerian cradle with the usual angles omega, chi and phi.
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Up to three position sensitive detectors are held on detector holders at
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different angles in gamma and nu. Or a single detector is fixed to this setup.
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The three position sensitive detectors may be moved up and down on a sphere
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around the sample. This allows to access different lattice planes when the
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eulerian cradle has been replaced by some cryostat or other sample
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environment devices to heavy to be used in conjunction with an eulerian
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cradle.
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</p>
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<p>
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The control of a four circle diffractometer requires a tight integration
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between measurement procedures and specialized data anlaysis software. For
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the actual control of the instrument, its movements and the actual
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measurement of reflections the SICS software is provided. Preliminary data
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analysis and special four circle calculations are done with a set of F77
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programs. These are mostly programs which originate from the ILL, France.
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</p>
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<p>
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Given this setup the rest of this manual logically has to have three parts:
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<ul>
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<li> A <a href="tricsgen.htm">general part</a> describing the principal
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operation of the SICS software.
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<li> A chapter describing the operation of TRICS with a
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<a href="tricsingle.htm"> single counter</a>.
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<li>A chapter describing the operation of TRICS with
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<a href="tricspsd.htm">position sensitive</a>
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detectors.
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</ul>
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</p>
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<!latex-off>
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<p>
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<hr size=4 width="66%">
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Download Manual
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<ul>
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<li><a href="tricsman.ps">Postscript Format</a>, 249KB.
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</ul>
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</p>
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<!latex-on>
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</BODY>
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</HTML>
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