ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Recently, a new type of cryogenically cooled high heat load monochromator was proposed [Knapp et al., Rev. Sci. Instrum. 65, 2792 (1994)] and developed at Argonne National Laboratory [Knapp et al., Rev. Sci. Instrum. 66, 2138 (1995)] and tested [Rogers et al., Rev. Sci. Instrum. 66, 3494 (1995)] at the European Synchrotron Radiation Facility (ESRF). These tests showed that powers of 153 W and power densities of 450 W/mm2 cause only negligible strain. These powers and power densities are larger than will be absorbed by the first crystal on an undulator beamline at the Advanced Photon Source (APS). In our earlier work, we suggested that the crystal might show strain at much lower values of the powers and power densities. We now can explain the ESRF results in terms of the unique role the negative thermal expansion coefficient of Si plays in minimizing strain. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1147459
Permalink