33 lines
1.2 KiB
HTML
33 lines
1.2 KiB
HTML
<html>
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<body>
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<hr size=4 width="66%">
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<h2>Special POLDI scan command</h2>
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<p>
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Additionally a special POLDI scan command was programmed which offers the
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possibility to scan variables (motor) against detector count rate. For this
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purpose the 400 detector cells are divided into 4 groups (5-100, 101-200,
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201-300, 301-395) where the count rates (stored in the histogram memory)
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are added.
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</p>
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<p>
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The command syntax for the POLDI specific scanning is like this:
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<BLOCKQUOTE>
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scanhm <i>var start delta np preset</i>
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</BLOCKQUOTE>
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All parameters must be specified. The parameters and their meanings:
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<UL>
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<LI><b>var start delta</b> This is how the variables to scan are specified. For
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each variable scanned the name of the variable, the start value and the step wide must be given.
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<LI><b>np</b> is the number of points to scan.
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<LI><b>preset</b> is the preset to use for the counter. As the counter mode,
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the mode <i>timer</i> is predefined.
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</UL>
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</p>
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<p>
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The scan data are saved in ASC-format in the directory /home/POLDI/scan.
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Additionally the typical NeXus-files are available for each step of the scan.
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The NeXus files are saved in the directory /home/POLDI/data/2002.
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</p>
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</body>
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</html>
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