Publication

A High Precision, High Stability, Four Bounce Monochromator for Diamond Beamline I20

Authors: G. Duller (Diamond Light Source) , J. Kay (Diamond Light Source) , X. Liu (Diamond Light Source) , S. Diaz-moreno (Diamond Light Source) , J. Sutter (Diamond Light Source) , B. Nutter (Diamond Light Source) , B. Dobson (Science and Technology Facilities Council (STFC))
Co-authored by industrial partner: No

Type: Conference Paper
Conference: MEDSI 2008
Peer Reviewed: No

State: Published (Approved)
Published: October 2008

Abstract: A scanning 4 Bounce Crystal Monochromator (4BCM) is being designed for use on Diamond's I20 (versatile spectroscopy) beamline. The instrument will have two independent axes, the first carrying two adjustable crystal sets, the second a pair of channel-cut crystal sets. All will be cryo-cooled. Repeatability of positioning of +/-300nradian is required of each axis to achieve coordination of better than 1microradian to maintain transmitted intensity. We present the development of the design of a high precision goniometer and describe a prototype we have constructed. Test results for a prototype goniometer supported on an air bearing and driven by a direct-drive motor are shown alongside specifications for the operational monochromator.

Subject Areas: Engineering


Instruments: B16-Test Beamline