Paper | Title | Page |
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FRAA02 |
Optimizing X-Ray Mirror Thermal Performance Using Variable-Length Cooling for High-Repetition-Rate FELs | |
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Funding: DOE SLAC National Accelerator Laboratory is developing LCLS-II, a superconducting linear accelerator based free electron laser capable of a repetition rate up to 1 MHz. To deliver the FEL beam with minimal power loss and wavefront distortion, we need grazing-incidence plane mirrors with height errors below 1nm rms, under operational conditions. We also need to mitigate thermal effects of a complex photon energy-dependent thermal profile. We discuss a mirror cradle that minimizes figure error using variable length water cooling through a gallium-indium eutectic bath, and curve correction with an off-axis bender. We present thermal and mechanical analysis, design and prototyping results of figure sensitivity under bender corrections. |
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Slides FRAA02 [12.848 MB] | |
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