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Design and performance of the Advanced Light Source double-crystal monochromator

Journal Article · · Review of Scientific Instruments; (United States)
DOI:https://doi.org/10.1063/1.1145838· OSTI ID:6863534
;  [1];  [2];  [3];  [4];  [1]
  1. Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
  2. Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States) Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154 (United States)
  3. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  4. National Institute of Standard and Technology, Gaithersburg, Maryland 20899 (United States)
+ Show Author Affiliations
A new Cowan type'' double-crystal monochromator, based on the boomerang design used at National Synchrotron Light Source (NSLS) beamline X-24A, has been developed for beamline 9.3.1 at the Advanced Light Source (ALS), a windowless ultrahigh vacuum beamline covering the 1--6 keV photon-energy range. Beamline 9.3.1 is designed to simultaneously achieve the goals of high energy resolution, high flux, and high brightness at the sample. The mechanical design of the monochromator has been simplified, and recent developments in technology have been included. Measured mechanical precision of the monochromator shows significant improvement over existing designs. In tests with x-rays at NSLS beamline X-23A2, maximum deviations in the intensity of monochromatic light were just 7% during scans of several hundred eV in the vicinity of the Cr [ital K] edge (6 keV) with the monochromator operating without intensity feedback. Such precision is essential because of the high brightness of the ALS radiation and the overall length of beamline 9.3.1 (26 m).
DOE Contract Number:
AC03-76SF00098
OSTI ID:
6863534
Journal Information:
Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:2; ISSN 0034-6748; ISSN RSINAK
Country of Publication:
United States
Language:
English

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Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ADVANCED LIGHT SOURCE
DESIGN
ENERGY RESOLUTION
MONOCHROMATORS
PERFORMANCE TESTING
RADIATION SOURCES
RESOLUTION
SYNCHROTRON RADIATION SOURCES
TESTING