| Paper | Title | Page |
|---|---|---|
TUPE17 |
The development of CVD Diamond Based FEL Photon Stoppers in LCLSII | |
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| Safety stoppers are required to absorb and stop the LCLS-II Free-Electron Laser (FEL) beam, which has the unique combination of extremely high peak fluence per pulse and enormous average power density. This is unprecedented at the existing 3rd generation synchrotron or current 4th generation low repetition rate FEL source, so that new solutions are required. CVD diamond has been proposed as the absorber material, for its low Z number, high thermal conductivity and high thermal shock resistance. The Photon Stopper design consists of a perimeter cooled CVD diamond absorber, clamped in between two copper (OFHC) heat sinks, with one looped with a water cooling line. The thermal studies include both steady state and instantaneous analysis. Diamond damage test results using LCLS FEL beam will also be reported. | ||
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