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Proceedings Paper

Adaptive silicon monochromators for high-heat-load insertion devices
Author(s): Hiroyuki Oyanagi
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Paper Abstract

A new concept of adaptive silicon crystal monochromator for high heat load insertion devices is proposed in order to dynamically correct the thermal distortion by piezoelectric translators as a function of beam power. Shapes and dimensions of cooling channel was optimized by testing various types of grooved crystals using a 27-pole wiggler magnet beamline. The results indicate that the cooling efficiency of grooved silicon crystals can be improved by replacing a conventional semicircular cooling channel with a flat cooling channel with an optimized dimension. The results of rocking curve measurement showed an energy resolution ((Delta) E/E approximately 2 X 10-4). A prototype of adaptive first crystal with grooves was fabricated using a new diffusion bond technique. It was found that the crystal surface was precisely bent to a radius of several hundred meters by a piezoelectric device. An adaptive approach to the second crystal using an inchworm mortor was presented for dynamical sagittal focusing for realizing the energy-independent horizontal focus.

Paper Details

Date Published: 20 January 1993
PDF: 10 pages
Proc. SPIE 1740, Optics for High-Brightness Synchrotron Radiation Beamlines, (20 January 1993); doi: 10.1117/12.138713
Show Author Affiliations
Hiroyuki Oyanagi, Electrotechnical Lab. (Japan)

Published in SPIE Proceedings Vol. 1740:
Optics for High-Brightness Synchrotron Radiation Beamlines
John R. Arthur, Editor(s)

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