ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The University of Wisconsin-Madison Physical Sciences Laboratory (PSL) has developed a new concept patented double-crystal monochromator for instruments operating in the low to medium photon energy range. Presently PSL is engaged in a collaborative project with the Pohang Light Source in South Korea to provide the internal mechanism for such a DCM; Pohang will supply the vacuum chamber and scan drive. The concept utilizes a straight arm linear rotating link called the "broomstick'' that is a cotangent generator. Coupled to the broomstick is a pair of unique half angle mechanisms that rotate the crystals at half the angle of the broomstick while maintaining crystal parallelism during the scan rotation. An external linear drive to one crystal through a bellows assembly provides the only required input for operation of the monochromator other than crystal angular adjustments by manual or piezoelectric means. The instrument is capable of operating at Bragg angles from 8° to 80°. This results in an energy range of 2 keV to 14.2 keV for Si(111) crystals. The instrument is also capable of UHV operation in the 1.0E−10 Torr range. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1147499
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