“Broomstick” DCM
![[photo of Broomstick DCM mechanism]](/wp-content/themes/default/images/broom.gif)
This double crystal monochromator is a concept developed by PSL. It uses a straight edge ("broomstick") mechanism to generate the cotangent function necessary, and a true half angle mechanism to maintain parallelism and rotate the crystals to the proper Bragg angles. The first of this type of monochromator was completed and delivered in March of 1996.
Features
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Bragg angle:
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8° – 80°
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Beam offset:
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50 mm up or down
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Crystal size:
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60 mm long x 100 mm wide x 3 mm thick (Can accommodate up to 25 mm thick)
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Cooling capacity (via liquid cooled substrate):
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300 Watts
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Crystal adjustment:
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while under vacuum
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UHV construction:
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10-10 Torr
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Bakeable to:
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150° C (except PZT with
125° C rating) |
Only one linear motion feedthrough required to operate entire scan mechanism.