FOCUS motors

Physical Motors

MTT

Monochromator two theta. Only readable up to know. Must be moved manually by pushing the detector around.

MSL

Monochromator shielding lift.

MTH

Monochromator theta.

MTX

Monochromator x-translation, vertical to monochromator surface.

MTY

Monochromator y-translation, parallel to monochromator surface.

MGO

Monochromator tilting.

M1CH

Monochromator 1 curvature horizontal.

M1CV

Monochromator 1 curvature vertical.

Virtual motors

Virtual motors are instrument parameters which can be driven with the drive and run commands, though they are not physical motors. Mostly this encompasses coordinated movements of motors around several axis or other lengthy and error prone hardware operations.

lambda

wavelength

ei

incident energy in meV.

fermispeed

fermi chopper speed.

diskspeed

disk chopper speed. This works only when the chopper is NOT in synchonized mode.

phase

chopper phase difference.

ratio

This is the ratio fermispeed/diskspeed. A value of two would mean that the diskchopper is running at half the speed of the fermichopper. Please note that the phase is set to 0 automatically while running this command by the chopper controller software from Dornier.