2018-09-28 11:47:25 +02:00

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<H2><A NAME="SECTION00411000000000000000">
MYTHEN</A>
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<P>
Normally the user can follow these rules:
<OL>
<LI>If the X-ray energy is lower than 8&nbsp;keV the <I>High gain</I> setting should be used. Since it is a slow mode of operation it is necessary to take care that the maximum count rate is lower than 100&nbsp;kcounts/s for all channels (use filters to reduce the beam intensisty).
</LI>
<LI>For energies higher than 8&nbsp;keV, the <I>Standard</I> setting is normally fine if the count rate can be kept lower than 300&nbsp;kcounts/s for all channels (use filters to reduce the beam intensisty).
<P>
</LI>
<LI>In case a larger count rate is required in order to keep the acquisition time shorter, the <I>Fast</I> setting must be selected. However the maximum count rate should never exceed 1&nbsp;Mcounts/s for all channels.
</LI>
</OL>
<P>
<DIV ALIGN="CENTER"><A NAME="fig:settings"></A><A NAME="1148"></A>
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<CAPTION ALIGN="BOTTOM"><STRONG>Figure 3.1:</STRONG>
Plot indicating the reccomended choice of detector settings as a function of the X-ray energy and maximum count rate per channel..</CAPTION>
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<ADDRESS>
Thattil Dhanya
2018-09-28
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