Speaker
Description
The LCLS-II is a superconducting linear accelerator that can generate 4 GeV electrons at repetition rates up to 1 MHz and is used at SLAC to generate a free electron laser (FEL) ranging between 200 eV and 4 keV for a variety of user experiments at the LCLS science hutches. As the FEL beam has very high brightness and can operate at high repetition rates, understanding its interactions with various materials is crucial for adequately developing and deploying radiation safety systems that can mitigate the primary hazard of the FEL beam, which is burning materials meant to contain the beam, and exposing a person to radiation. The design of radiation safety systems was performed using conservative assumptions and modeling; however, there is still uncertainty in the response of the system. To gain confidence in the system, a series of tests referred to as “bootstrap tests” has been developed for LCLS-II.
This talk will summarize the results of the bootstrap testing and provide experimental data related to FEL interactions with matter that are important to radiation safety. Some key experimental results include the confirmation of the tunneling effect for high repetition rate FEL beams in air, and characterization of the drill speed and hole formation of FEL beams burning materials relevant to radiation safety.
A look forward will also be presented to LCLS-II-HE, which extends the electron beam energy to 8 GeV while maintaining the high repetition rate capability, and the bootstrap plan that has been developed to address new hazards and the analysis that has been developed to mitigate hard x-ray beam hazards. Specific focus will be placed on new testing related to the ability of materials to withstand certain FEL exposure conditions and testing specific to hazards from hard x-ray diffraction.
This work was supported by Department of Energy contract DE-AC02-76SF00515.
The LCLS-II is a superconducting linear accelerator that can generate 4 GeV electrons at repetition rates up to 1 MHz and is used at SLAC to generate a free electron laser (FEL) ranging between 200 eV and 4 keV for a variety of user experiments at the LCLS science hutches. As the FEL beam has very high brightness and can operate at high repetition rates, understanding its interactions with various materials is crucial for adequately developing and deploying radiation safety systems that can mitigate the primary hazard of the FEL beam, which is burning materials meant to contain the beam, and exposing a person to radiation. The design of radiation safety systems was performed using conservative assumptions and modeling; however, there is still uncertainty in the response of the system. To gain confidence in the system, a series of tests referred to as “bootstrap tests” has been developed for LCLS-II.
This talk will summarize the results of the bootstrap testing and provide experimental data related to FEL interactions with matter that are important to radiation safety. Some key experimental results include the confirmation of the tunneling effect for high repetition rate FEL beams in air, and characterization of the drill speed and hole formation of FEL beams burning materials relevant to radiation safety.
A look forward will also be presented to LCLS-II-HE, which extends the electron beam energy to 8 GeV while maintaining the high repetition rate capability, and the bootstrap plan that has been developed to address new hazards and the analysis that has been developed to mitigate hard x-ray beam hazards. Specific focus will be placed on new testing related to the ability of materials to withstand certain FEL exposure conditions and testing specific to hazards from hard x-ray diffraction.
This work was supported by Department of Energy contract DE-AC02-76SF00515.
| Topics | T6. Radiation damage to materials |
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