58 lines
1.4 KiB
HTML
58 lines
1.4 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>FOCUS motors</TITLE>
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</HEAD>
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<BODY>
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<H1>FOCUS motors</H1>
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<P>
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<h2>Physical Motors</h2>
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<DL>
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<DT>MTT
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<DD>Monochromator two theta. Only readable up to know. Must be moved manually
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by pushing the detector around.
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<DT>MSL
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<DD>Monochromator shielding lift.
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<DT>MTH
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<DD>Monochromator theta.
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<DT>MTX
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<DD>Monochromator x-translation, vertical to monochromator surface.
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<DT>MTY
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<DD>Monochromator y-translation, parallel to monochromator surface.
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<DT>MGO
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<DD>Monochromator tilting.
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<DT>M1CH
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<DD>Monochromator 1 curvature horizontal.
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<DT>M1CV
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<DD>Monochromator 1 curvature vertical.
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</DL>
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</P>
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<h2>Virtual motors</h2>
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<p>
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Virtual motors are instrument parameters which can be driven with the
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drive and run commands, though they are not physical motors. Mostly
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this encompasses coordinated movements of motors around several axis
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or other lengthy and error prone hardware operations.
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<dl>
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<DT>lambda
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<DD>wavelength
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<DT>ei
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<DD>incident energy in meV.
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<DT>fermispeed
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<DD>fermi chopper speed.
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<DT>diskspeed
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<DD>disk chopper speed. This works only when the chopper is NOT in
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synchonized mode.
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<DT>phase
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<DD>chopper phase difference.
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<DT>ratio
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<DD>This is the ratio fermispeed/diskspeed. A value of two would mean that the diskchopper is running at half the speed of the fermichopper.
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Please note that the phase is set to 0
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automatically while running this command by the chopper controller
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software from Dornier.
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</dl>
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</p>
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</BODY>
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</HTML>
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