Multilayers and Crystal for a Multi-bandpass Monochromator

Conference · Tue Jan 01 04:00:00 EST 2008

OSTI ID:972010

Feng, Renfei ^[1]; Platonov, Yuriy ^[2]; Broadway, David ^[2]; Ice, Gene E ^[3]; Gerson, Andrea ^[4]; McIntyre, Stewart ^[5]

---

1. Canadian Light Source, Saskatoon, Canada
2. Rigaku Innovative Technologies, Inc., Auburn Hills, Michigan
3. ORNL
4. University of South Australia
5. University of Western Ontario, The

VESPERS beamline is a hard X-ray microprobe beamline dedicated to micro-diffraction and micro-fluorescence analysis at the Canadian Light Source; it requires multi-bandpass X-ray beams for different types of samples and experiments. A specially designed double crystal/multilayer monochromator was built for this purpose with three different bandpasses: 0.01%, 1.6% and 10%. The diffraction elements used for the monochromator have a triple-stripe design using Si(111) crystal as a single substrate with two differing stripes of Mo/B4C multilayers deposited thereon. The uncovered Si(111) section provides a 0.01% bandpass, while the periodic and depth-graded Mo/B4C multilayers provide 1.6% and 10% bandpasses, respectively. This paper outlines the requirements and specifications of the diffracting elements as well as the design, deposition and optimization of the multilayers. The performance of the deposited multilayer structures has been tested using Cu-Ka radiation line with a Huber diffractometer.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 972010
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BORON CARBIDES
CANADA
DEPOSITION
DESIGN
LAYERS
LIGHT SOURCES
MOLYBDENUM
MONOCHROMATORS
PERFORMANCE
SILICON
X RADIATION