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Proceedings Article

Design of a multipurpose mirror system for LCLS-2 photon transport studies (Conference Presentation)

[+] Author Affiliations
Daniel S. Morton, Daniele Cocco, Nicholas M. Kelez, Venkat N. Srinivasan, Peter M. Stefan, Lin Zhang

SLAC National Accelerator Lab. (United States)

Proc. SPIE 9965, Adaptive X-Ray Optics IV, 996506 (November 2, 2016); doi:10.1117/12.2238784
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From Conference Volume 9965

  • Adaptive X-Ray Optics IV
  • Stephen L. O'Dell; Ali M. Khounsary
  • San Diego, California, United States | August 28, 2016

abstract

LCLS-2 is a high repetition rate (up to 1 MHz) superconducting FEL and the soft x-ray branch will operate from 0.2 to 1.3 keV. Over this energy range, there is a large variation in beam divergence and therefore, a large variation in the beam footprint on the optics. This poses a significant problem as it creates thermal gradients across the tangential axis of the mirror, which, in turn, creates non-cylindrical deformations that cannot be corrected using a single actuator mechanical bender. To minimize power loss and preserve the wave front, the optics requires sub-nanometer RMS height errors and sub-microradian slope errors. One of the key components of the beam transport in the SXR beamline is the bendable focusing mirror system, operated in a Kirkpatrick-Baez Configuration. For the first time in the Synchrotron or FEL world, the large bending needed to focus the beam will be coupled with a cooling system on the same mirror assembly, since the majority of the FEL power is delivered through every optic leading up to the sample. To test such a concept, we have developed a mirror bender system to be used as a multipurpose optic. The system has been very accurately modeled in FEA. This, along with very good repeatability of the bending mechanism, makes it ideal for use as a metrology tool for calibrating instruments as well as to test the novel cooling/bending concept. The bender design and the tests carried out on it will be presented. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Daniel S. Morton ; Daniele Cocco ; Nicholas M. Kelez ; Venkat N. Srinivasan ; Peter M. Stefan, et al.
" Design of a multipurpose mirror system for LCLS-2 photon transport studies (Conference Presentation) ", Proc. SPIE 9965, Adaptive X-Ray Optics IV, 996506 (November 2, 2016); doi:10.1117/12.2238784; http://dx.doi.org/10.1117/12.2238784


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