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High Heat Load & Energy DCM Installed At The
Diamond Light Source
IDT have created an original double crystal
monochromator (DCM) design to tackle the
formidable performance criteria required for the
Extreme Conditions Beamline (I15), at The
diamond Light Source (DLS).
The DCM has been designed to operate with heat
loads up to 650W over an energy range of 18 to
80keV.
The high heat load indirect crystal cooling
design incorporates features to enhance the
fluid heat transfer coefficient and novel clamp
design to provide an even clamping force.
The high energy specification required the
development of a new encoder system to reduce
systematic errors and minimise mechanical
influences.
 
General Design Features
The DCM consists of 2 independent crystal cages,
mounted on a common base plate, which in-turn is
mounted through the chamber on to a massive
granite block.
Both crystal cages are mounted on a vertical
slide and utilise a tangent pusher to drive the
Bragg axis.
The 1st crystal support is translated
in the Z direction by a linear slide. Only the
1st crystal possesses the extra roll
and fine pitch degrees of freedom.
The DCM has
successfully undergone a SR beam test @ 20, 40,
60, & 80 KeV. The graphical output as measured
on the 19th April 2007 can be seen
here.
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ASP
(Australian Synchrotron Project) Microspectroscopy
Beamline
