35 lines
1.4 KiB
HTML
35 lines
1.4 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Hklscan</TITLE>
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</HEAD>
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<BODY>
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<H1>Hklscan</H1>
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<P>
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Hklscan is a command which allows to scan in reciprocal space expressed as
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Miller indizes on a four circle diffractometer. Prerequisite for this is
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the existence of a scan object and the hkl-object for doing crystallographic
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calculations. Make sure the properties of the hkl object (UB, wavelength, NB)
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have some reasonable relation to reality, otherwise the diffractometer may
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travel to nowhere. Also it is a good idea to drive the diffractometer to the
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end points of the intended scan in reciprocal space. hklscan will abort if
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the requested scan violates diffractometer limits. The commands implemented
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are quite simple:
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<dl>
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<dt>hklscan start fH fK fL
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<dd> sets the start point for the HKL scan. Three values required, one for
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each reciprocal axis.
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<dt>hklscan step sH sK Sl
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<dd> sets the step width in reciprocal space. Three values required, one for
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each reciprocal axis.
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<dt>hklscan run NP mode preset
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<dd>executes the HKL scan. NP is the number of points to do, mode is the
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counting mode and can be either timer or monitor and preset is the preset
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value for the counter at each step.
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</dl>
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Data is written automatically into a slightly modified TOPSI data format
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file. The status display with topsistatus or scanstatus might be slightly
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erratic as it uses two theta as x-axis.
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</P>
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</BODY>
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</HTML>
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