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SLAC Publication: SLAC-PUB-15708
SLAC Release Date: September 9, 2013
Radiation Safety at LCLS: The Photon Beams Maximum Capability and Material Damage Potential
Bauer, Johannes.
The Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory is pushing with its high-brilliance X-ray beam the boundaries also for Radiation Protection.

One of the factors to be considered during the design of shielding and other safety systems is the strength of the beam that the facility might be capable of. Recent estimates of these capabilities for this new and still evolving facility are being discussed in this report.

Especially close to the Undulator... Show Full Abstract
The Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory is pushing with its high-brilliance X-ray beam the boundaries also for Radiation Protection.

One of the factors to be considered during the design of shielding and other safety systems is the strength of the beam that the facility might be capable of. Recent estimates of these capabilities for this new and still evolving facility are being discussed in this report.

Especially close to the Undulator and after focusing elements, the X-ray beam is challenging to contain, since materials like steel and even strong materials like boron carbide (B4C) can be damaged by the beam. Dedicated experiments to understand the damage threshold of B4C have been performed.

Self-seeded beam and expansion to lower energies (down to below the carbon edge at 280 eV) create further challenges that had not been mitigated during the original design. Examples of recent analyses and mitigations are being described. Show Partial Abstract
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  • Interest Categories: Safety, X-Ray Free Electron Laser